[[quoteright:170:[[VideoGame/{{Minesweeper}} http://static.tvtropes.org/pmwiki/pub/images/minesweeper.JPG]]]]
[[caption-width-right:170:[-[[Film/IndianaJonesAndTheLastCrusade You must choose...but choose wisely!]]-] ]]

->''"If no mistake have you made, yet losing you are... a different game you should play."''
-->-- '''Yoda''', ''Franchise/StarWars: Literature/{{Shatterpoint}}''

The Luck-Based Mission is a bane to many gamers because if luck is not with you, you'll lose. The worst examples are when skill is completely removed as a factor. Regarded as frustrating at best and often an infuriating stumbling point, the games that actually feature this as a requirement are thankfully few, but still, they're present. SaveScumming is a requirement.

A particularly repellent form of Luck Based Mission is one where the game ''[[TakeThatAudience mocks you]]'' for failure. As if it's ''your fault'' that the RandomNumberGod is displeased. Then again, inciting the AtomicFBomb tends to help a few types of people vent their frustration on anything other than an unrelenting computer. (Others threaten it with the junkyard.)

This trope is particularly vexing for {{speedrun}}ners; gamers can pour as much practice as they want into perfecting skill-based portions of the game, but that won't stop their speedruns from being ruined by one bit of bad luck. Ditto with [[ScoringPoints score attackers]], who find that a significant portion of their points come from luck-based elements.

A subtrope of FakeDifficulty. Sister trope to TimedMission and EscortMission. Cousin trope of TrialAndErrorGameplay. Has a very high chance of being ThatOneSidequest, and might be rewarded with ThatOneAchievement.
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!!Examples

[[foldercontrol]]

[[folder:Action Adventure]]
* The last boss in ''VideoGame/DragonsDogma'' can only be beaten if you grab him & your pawn finshes him off or your pawn grabs him & you finish him off. If your pawn doesn't feel like fighting, you can't win.
** There's also an optional quest that requires you to kill a dragon very early in the game. Doing so at that point would probably take around 30 minutes but he can suddenly fly away at any time even if his wings are broken or he's stunned & he does so often that you probably won't even have enough time to take the first of his several health bars. If that happens the quest is labeled as failed. You can come back & try again later though.
* One particular Heart Piece to be found in ''VideoGame/TheLegendOfZeldaOcarinaOfTime'' where the player must pay a slowly moving grave digger 10 rupees to dig in certain areas he walks across. What the grave digger finds when he digs is completely random, from a few rupees, to the valuable Heart Piece, and even nothing at all. Due to the nature of this, getting this Heart Piece can be a quick and painless walk to the graveyard at night or an extremely long and arduous affair that wastes all of your rupees.
** This is still better than the buried Heart Piece in ''VideoGame/TheLegendOfZeldaALinkToThePast'': 80 rupees for 30 seconds of digging in a vast field. Thankfully there ''is'' a good source of income in the Light World version of the nearby village, and it's not uncommon to find more than your 80 rupees back.
** Also two such heart pieces in ''[[VideoGame/TheLegendOfZeldaOracleGames Oracle of Seasons/Ages]]''. One of them drops randomly when you [[CrashIntoHello run into]] Maple the witch; the other comes from a Gasha Tree. There are rings that can be worn to increase the chances of these [[RandomlyDrops random drops]], but they're still rare.
*** Try to collect all 64 rings in these games and keep your sanity intact. Probably more than half of them are gotten sheerly through blind, dumb luck--even some that are won as prizes from mini-games. Not to mention a few that are so rare you'll have a better chance of winning your local lottery than obtaining the particular ring in these two games.
** Another Oracle of Ages example. To get the Boss Key, the player has to pull the correct lever in a certain room; the wrong lever makes a bunch of snakes fall from the ceiling. Each lever pull also resets which lever is the "correct" one, such that the player could theoretically have to attempt the lever-pull indefinitely.
** In Oracle of Seasons, to get to the 4th floor of Ancient Ruin, you have the same puzzle as Oracle of Ages above but with a pair of floor switches instead of levers.
** ...and shortly after that, you have ThatOneBoss, Manhandla, whose body moves in random directions, and whose only vulnerable spots are the mouths that randomly open to shoot at you and are only vulnerable to the boomerang... the slowest weapon in the game.
** If you're a completionist, ''VideoGame/TheLegendOfZeldaTheWindWaker'' can drive you insane with the battleship-esque minigame. It's bad enough that you have to win it once to get a heart piece, then a second time to get a treasure map. But if you want to get a second treasure map, you have to beat the game in less than 20 moves. Be prepared to run out of rupees very quickly.
** While not required to get anything useful, ''VideoGame/TheLegendOfZeldaSkywardSword'' has the Thrill Digger minigame, which functions just like Minesweeper... except that with a single exception, the indicators tell you ''two'' possibilities for how many traps are around. Two blue rupees next to each other could mean they share a bomb, they share a bomb but one also has one to the side, they share two bombs...
* Laura's final quest in ''VideoGame/CastlevaniaOrderOfEcclesia'' requires you to complete one of the games super-hard bonus dungeons, at the end of which the needed item MAY spawn. If you don't get an Alexandrite from the final chest, you have to run the entire bonus dungeon again...unless you exploit a ludicrous glitch to get to the chest which is mere inches from the entrance, but tantalizingly out of reach.
* The freeware game ''VideoGame/LaMulana'' has one in its hidden bonus dungeon the Hell Temple, success in three of the final rooms depends on both luck and high levels of skill; it could take one try or 5 hours to complete and if you mess up on any of the three you have to restart, after you defeat a couple of annoying enemies of course. Luckily, there are a few, uh, "strategies" to get through the first room without actually doing the luck parts. You're still screwed with the second one though.
* ''VideoGame/MetroidPrime 2: Echoes'' has the infamous [[ThatOneBoss Boost Guardian]]. The thing ricochets around the tiny arena it's in like a pinball. It's completely impossible to predict where it's gonna be next, and you're constantly taking damage from being in the DarkWorld. In addition, the health refills for the fight are located in four pillars around the room, which can only be destroyed by the boss. Beating it requires that it not hit you excessively, and that it break open the pillars when you need health refills rather than breaking them all right away and wasting the health pickups.
* In order to get one of the life containers in ''VideoGame/{{Alundra}}'', you need to guess the correct color in a roulette game five times in a row. To get one of the gilded falcons, you need to do this three more times. Even understanding the algorithm that the game uses to select the color (The opposite location to where the light ended up last round, plus or minus up to 2), you still only have a 40% chance of guessing right on a typical round. Fortunately, once you pull it off once, you'll have all the money you need for the trial and error needed on the later attempts.
[[/folder]]

[[folder: Action Game]]
* ''VideoGame/{{Pandemic}} 2'' plays like a luck-based mission most of the time. You can play more or less perfectly, but whether you can win or not will come down to whether one or two isolated regions seal themselves off before they get infected. They usually do, and apart from trying again (and hoping you ''start'' in one of these areas) there's nothing you can do about it. The most isolated area, Madagascar, has achieved MemeticMutation status. The Kongregate-hosted version of this game acknowledges the fact with a President of Madagascar Badge.
* The Top-down shooter stage from ''GunstarHeroes'' on the Game Boy Advance can be placed in this category. The damage you take is high already, but even if you make it to the attack helicopter at the end of the section in that stage, it all boils down to whether or not the missiles, laser, and submarines fire anti-air shots hit you, and if you get hit once, the entire screen will be flooded with bullets and you'll die as your helicopter is such a large target. This makes the only possible strategy for this boss be spray and pray, hoping that you will have a little energy left for the last section of the stage.
* The Russian indie game ''{{Hammerfight}}'' features the unfortunate addition of "siege bombs", which are an instant kill if they touch a character (including you), and even if they miss, they have an insanely ''huge'' blast radius and can easily take off half the players health from a half screen away. Their power is balanced out by their high price (making it TooAwesomeToUse). The [=NPCs=], however, have no such qualms about throwing one at you, especially when you are an inch from their face and cannot possibly dodge it in time. It is especially infuriating in Arena, where at higher levels you must fight a constant stream of enemies, any one of which could end your game immediately through a single suicidal siege bomb toss.
* ''VideoGame/CaveStory'' has a corridor in the BonusLevelOfHell where blocks, both large and small, rain down upon you dealing ten damage each completely randomly. [[FromBadToWorse As if that's not enough,]] there GoddamnedBats are flying around, too. It's probably safer to take five damage from the bats and use the Booster 2.0 to blast across the area while you still have MercyInvincibility.
[[/folder]]

[[folder:Adventure Game]]
* Particularly remarkable was a casino in ''VideoGame/LeisureSuitLarry 1'', where you were actually expected by the game designers to use SaveScumming to defeat the slot machine (there is no other way to make progress in the game).
** A similar situation occurs with a video poker machine in ''VideoGame/LeisureSuitLarry 5''. SaveScumming is not required (if you lose your money you can hit for a little more) but definitely encouraged (the total you need to advance is very high compared to your starting amount).
* One of many, many examples in a long line of evidence that [[{{Sierra}} Sierra personally hates you]], the original EGA version of the original ''SpaceQuest'' has one segment where you need to turn $30 into about $240, and the only way to do it is to be really lucky with the slot machine in the bar. Aside from you being just as likely to lose money as to win, there's one special configuration which, when hit, ''[[EverythingTryingToKillYou makes the machine shoot a laser and kill you.]]'' You ''have'' to save scum to get past this part.
** The VGA remake added an item picked up during the opening sequence (a magnet) that can be affixed to the slot machine that forces a jackpot enough times to meet the $240 goal and then breaks.
* Because the behavior of [=NPCs=] in Addison-Wesley's ''VideoGame/{{The Hobbit|1982}}'' PC game (in the 1980's) was randomly determined, the whole game could be considered a Luck-Based Mission. There's a possibility the roaming vicious warg could be captured by the wood elf long before you get to the wood elf's dungeon. And if said warg kills the only person capable of unlocking the jail door and you end up on the wrong side of that door, the game's unwinnable. Even worse, [=NPCs=] will sometimes randomly refuse to obey your orders [[FakeDifficulty for no good reason]]. Bard the bowman is the only one who can kill the dragon, but if you order him to do it and he says 'No', the dragon will kill you right away.
* The lava pit in Broderbund's ''Mask of the Sun''. At a certain point in what had previously been more or less an illustrated text adventure, the player is confronted with a pool of lava, with a stepping stone that rises and sinks into the lava rapidly. You're given a choice between jumping to the stone, and then to the other side of the pit ... or retreating back to the poison gas room you just escaped and die. But even if you choose to jump, there's still a VERY good chance you'll end up with "splash and burn" and die. The stepping stone moves so rapidly (much like rapid eye-blinking) that timing doesn't even enter into it ... it's dependent on luck. Furthermore, it became clear that it was the only way to proceed.
* ''VideoGame/KingsQuestV''. Just [[http://www.youtube.com/watch?v=kvXjlRdoids look what happened to this guy!]] Mordack ''randomly'' shows up in his castle to kill you, and if he appears you're dead, no matter what.
* ''VideoGame/KingsQuestVI'' did this with the Cliffs of Logic. Usually if you are a little bit off on your clicking, you will almost lose your balance, but right yourself. However, if you did not save just before trying to climb the cliffs, then you would instead fall to your death when you inevitably misclicked!
* Similar to the ''King's Quest V'' example, {{Infocom}} (a designer which otherwise knew better) had the Crown Jewels puzzle in ''VideoGame/{{Zork}} III''. In order to steal what you need from the museum, you have to wait until the guards leave. But there's a chance that a guard will randomly walk in and kill you. There's no way to hide, and there's no warning that it's going to happen. And if he kills you during this sequence, it's 'Game Over', since at this point the player is out of the Dungeon Master's reach (the Dungeon Master usually gives the player another chance when dying).
** In the game's predecessor, ''Zork II'', the game's antagonist, the Wizard of Frobozz, often randomly shows up to cast spells on the player. These spells are annoying, but harmless ... usually. The exceptions to 'usually' are what turn this into a luck-based mission, as it's possible for the Wizard to cast 'Fall' (causing you to fall) or 'Float' (causing you to float) while you're in the hot-air balloon. If he shows up at the wrong moment and casts these spells, the player will lose the hot-air balloon forever and be unable to complete the game.
*** Not to mention that some spells in some situations are just plain instant death, like 'Fear' when you're on a cliff or 'Fierce' when you're in the same room with the dragon, and that no matter what if the Wizard happens to cast enough spells that hold you in place for too long ('Float', 'Freeze', etc.) your lantern will run out of batteries before you have time to complete the game.
* ''VideoGame/GoldRush'', one of the lesser-known Sierra adventures, has a few places where you can randomly catch a lethal disease, or get swept away while crossing a bridge. The death message even informs you, "there was nothing you can do; sometimes terrible things happen." And indeed, there is no way to prevent this other than to restore. Thankfully the chances of it happening are rather low.
** When it does happen, though, the only recourse - as EVERY guide out there will point out - is to load a game from BEFORE you made the action that results in you leaving Brooklyn and leaving town on a different frame. Restoring from before the last action that you were healthy won't cut it [unless you catch the disease right after leaving Brooklyn].
* The bomb-disarming Mastermind puzzle in ''TheJourneymanProject''. You have to solve three levels, with an extra color added each level. If you miss too many times, you go back to square one. If you take too long, the shield generator's radiation kills you.
* To get to the last challenge of the Big Fish hidden object game ''VideoGame/MysteryCaseFiles: Ravenhearst'', you need to collect seven keys hidden around the mansion and take them to the cellar. The keys are easy, there's one in every room, you just need to be able to find it. The difficulty is that the game will randomly select which rooms you may go into for the keys. If none of these randomly-selected rooms are in the basement, you have no way to get to the cellar. The game auto-saves as you go along, so when you reach the end of the game after hours of playing and you can't win there's nothing to do but start over from zero and play all the way through again.
* The poker section from the original ''PoliceQuest''. You do badly, it's game over. Fortunately, the VGA remake makes it skippable.
[[/folder]]

[[folder:Driving Game]]
* The final mission leading to the [[MultipleEndings best ending]] of the original ''{{Driver}}'' videogame involves driving [[InvisiblePresident The President]] across UsefulNotes/NewYorkCity while dozens of hitmen and {{corrupt cop}}s in [[TheComputerIsACheatingBastard nigh-indestructible uber-fast cars]] try to ram your car off the road and reduce it to a wreck. Since the hitmen cars are so much faster and tougher than yours, the only way to complete the mission is if you're lucky enough that the AI cars wreck ''themselves'' as you scream across town. The mission is nearly impossible without an invincibility cheat (and you can still die by flipping over with invincibility on).
** Every time-based mission requiring you to evade the cops while reaching your destination (Read: The majority) was luck-based. If a cop spawns too close to your destination, you have to detour and will run out of time.
* Almost any street racing game where traffic motion is random. Particularly noticeable in the ''{{Burnout}}'' series, where a long vehicle like a bus pulls out in front of you, there's nothing you can do to prevent a crash. On time trials, this can make a track {{Unwinnable}}.
** As of ''Takedown'', however, all traffic in hotlap-based races is completely scripted every time, in career at least. You can still get pretty boned in other modes, though.
*** Sometimes the Signature Takedowns that appeared in ''Takedown'' and ''Revenge'' are still an example of this, though. Some of the ones involving crashing opponents into static bits of the environment are easy enough: you find your landmark, you happen upon your hapless victim, you push said victim into the landmark. Bingo, the game gives you credit for the Signature Takedown. Your weapon is timing-which you don't have when you're tasked with Signatures involving crashing opponents into, say, trams or buses. Both are moving, neither are alone in traffic, and both are interspersed in obstacles. Even if you and your opponent are in the right position for a takedown, should another car or a lamp post or something get in the way and the car crashes into THAT? Regular takedown, back to square one. In Revenge, particularly, there was one involving crashing an opponent into a tram-a tram that liked moving into a little chute in between two narrow walls a lot. Finally, because their appearance isn't scripted (they're just coded so that they appear down certain roads on certain tracks, not precisely where or when) they might not show up with the main pack of cars at all.
* It could be argued that the higher difficulty levels in ''VideoGame/MarioKart Wii'' qualify, as no matter how well you race, [[GangUpOnTheHuman the AI opponents will inevitably gang up on the player]]. Making matters worse is their tendency to fire off the POW Block (which stuns everyone in front of the user) and the Lightning Bolt (which stuns ''and shrinks'' everyone except the user) in quick succession, and since any items you're carrying are dropped when hit by these items, even being hit by only ''one'' of the two is virtually a death knell.
** Not only that, but the game suffers from ArtificialStupidity if you decide to play Battle or a team VS race with the AI. Your computer allies will either do as good as you or be extremely stupid and not do anything to help your team win, leaving you to do all the work. How well your computer allies play is random, thus, luck based. It is possible to place first in all four races and ''still'' lose because of your AI teammates.
*** This is probably because, like a standard non-team race, each AI kart is randomly assigned a place before the first race ever really starts. If most of your team is on the lower end of the spectrum, better luck next time.
** Mario Kart Wii also rubs acid deep into your cuts by giving you a ranking after completing a cup based on how "well" you drove. Holding first for most of a race and running afoul of few traps nets you a high ranking. Getting assaulted by the computer constantly and only winning by the skin of your teeth through sheer luck and determination nets you a low ranking. On the higher-difficulty cups, the latter happens far more often than the former. Thus, not only does it require a herculean effort on your part even to place first, but it's most likely that you'll then be slapped with a D or C ranking ''for being such a poor driver''. Oh, yeah. Did we mention that getting some of the best characters and vehicles requires you to get two gold stars (the highest rank) on the hardest cups at the highest difficulty levels?
* One of ''VideoGame/{{Kirby}} Air Ride'''s objectives involves getting all 3 pieces both the Hydra AND the Dragoon in a single City Trial session. The session can only last 7 minutes max, so good luck finding a SINGLE piece of EITHER machine.
* ''RadRacer'', a cross country racing game on the NES, falls under this due to when and where other cars spawn and if they swerve into your lane. Touching them from the side will send your car flying sideways and into an obstacle off road, costing you time.
* In ''VideoGame/WipEout Fusion'', there is an elimination challenge where you have to destroy a large number of enemy ships on the racetrack. The tools given to every ship to fight this battle: grenades (weak), rockets (beyond weak), quakes (massive damage to '''EVERYONE''' in front of you). Weapon pads rarely provide a quake, but there are 15 ships rolling the dice so quakes will go off every few seconds, obliterating your opponents. After half a lap, the pack of 15 ships will have been reduced to about 2 or 3. Which would be nice, if you didn't have to kill 5 enemies to win this challenge. Your only chance is to get a quake from pretty much the first or second weapon pad, and happen to use it at the right moment so it finishes off 5 ships. You get no second chance.
* A lot of the faster races in ''RidgeRacer 3D'' took advantage of fixing the much-maligned ancient collision mechanics of previous Ridge Racer titles, [[GoneHorriblyRight then took advantage of it]] [[NintendoHard way too much.]] Since everyone now loses very little speed when colliding with each other or not scraping walls for a very long time, even mid-game races can turn into outrageous three-or-four-machine melees wherein cars are overtaking one another, going [[RubberBandAI far, far faster than they should]]-[[TheComputerIsACheatingBastard which you can't do in kind]]. This means you may keep some nitrous for yourself to break away from the pack and win a race...only to have the rubber-banding kick in and have a truck twice as tall as you zip past at what must be 300 MPH.
* An interesting example in GranTurismo. In some restricted events there can be a car far superior to the rest of the grid and your own. For example, in the World Classic Car Series (where most cars have 100-200HP) you could be driving a respectable 2000GT knowing you'll certainly win, but if you're unlucky you could find an AC 427 S/C has arrived to ruin your day.
** In Gran Turismo 5, a lot of the seasonal challenges feature a single lap to a difficult track (Nurburgring Nordschleife or Suzuka are the regulars) in which you start last and have to finish first. This can become, either {{Unwinnable}} if the car starting first is a fast one or EasierThanEasy if it's a turtle, helding back all the others.
[[/folder]]

[[folder:Edutainment Game]]
* ''VideoGame/TheOregonTrail'' is one whole luck-based game. Characters will randomly get sick, and may even die immediately, giving little time to allow for recovery. Crossing the rivers is luck-based, too; fording a river isn't, as you shouldn't really ford a river more than three feet. Floating a wagon across carries the risk of tipping over, causing the loss of your items (and some of your people!). Even the ferry carries a very small risk -- it can break loose from moorings or tip/sink. In other words, as in history, ''nothing'' is guaranteed in this game.
** In ''Oregon Trail II'', if you're unlucky enough, the wagon can tip and drown a person in as little as ''a foot and a half'' of water. You can tip even on "not too steep" hills. And hunting carries the risk of an (sometimes instantly fatal) accidental gunshot or animal attack for your leader. [[WeCannotGoOnWithoutYou If he/she dies, it's game over]]. God help you if you get caught in a blizzard with "no progress", low/no food, few draft animals, and nothing to trade.
*** While frustrating, this is very much [[TruthInTelevision Truth In Video Gaming]]. A number of soldiers in Iraq and Afghanistan were drowned when Humvees flipped into shallow water. If you are underneath something extremely heavy like a wagon when it flips, you really will drown in 1 foot of water before they can get it off you.
* In ''VideoGame/TheClueFinders Search and Solve Adventures'', one mini-game you find early on involves TrialAndErrorGameplay, since that is after all, the entire ''point'' of the minigame. You have to guess the rows and columns, represented by colours and shapes. (The points on the grid are coloured shapes) And you have to get certain points so you can get past the game and get a reward to continue on. Problem? All it's randomized...all the spaces on the grid you have to hit could be all clustered in one corner, and the first choice you pick happens to be right on the other side, in a row and column that won't help you. You'd also be surprised how ''hard'' the 9-guess levels can be.
* ''[[BuzzyTheKnowledgeBug Let's Explore the Airport with Buzzy the Knowledge Bug]]'' got '''very''' carried away with this. It has an arcade-styled minigame called Lost Luggage, where the goal is to get each correctly colored suitcase into its matching bin. You would do this by taking control of conveyor belts and other mechanisms. The last level, Level 99, has six chutes all of the same kind, where if you put a suitcase down a chute it could come out of any of the other five in any four directions. There are several unchangeable conveyor belts that will lead it into a bin. If the wrong color lands in it, you have to restart the level. The problem is, you have no control over where it goes, and every odd is stacked against you in every possible way. Didn't think this could get worse? You have to be this lucky ''four times''. Even worse, if you do get past it somehow, your only prize is [[BraggingRightsReward being sent back to Level 1]].
* ''Lionel Trains Presents: Trans-Con!'' is an EdutainmentGame dealing with the building of the Transcontinental Railroad. The player has a choice of which side to start building from: Central Pacific or Union Pacific. Central Pacific has a much shorter route, however the player is required to blast through mountainous terrain with dynamite to place the tracks. Using said dynamite has a very high chance of injuring workers in the blast, and you have to make multiple blasts to cut through even one bit of terrain. It's entirely possible the player will lose all his workers (and therefore lose the game) in the first level, before even ''finishing one tunnel''.
* ''OdellLake'' has the insects and insect larvae and the chub, if you can eat that. There is always a small chance that one of those items will conceal a hook. Fillet of mackinaw trout, anyone?
[[/folder]]

[[folder:Fighting Game]]
* In ''VideoGame/SuperSmashBros. Brawl'', getting all the trophies requires you to use trophy stands on every kind of enemy in the adventure mode, including bosses. Of course, these stands are rare, and (just like Pokémon) you have to weaken the enemy in order to catch it, so it doesn't always work. Raising the difficulty level and using certain stickers will raise the chance of getting a stand, but it's still annoying when you hit a boss too hard, kill it, and you have to go through the whole level again for another chance, not to mention if the stupid bastards hit a conveniently-spawning Koopa Shell or a Blast Box with a stray attack of their own and thus end up suiciding without you being able to do a Goddamn thing about it. Playing with a friend can greatly help: one keeps the trophy stand and keeps distractions away, while the other whittles down the boss's health.
** You know what IS luck-based though? The Trophy Lottery. Brawl does away with that annoying feature in favor of a shooter game that's just as addictive in order to get trophies and stickers. However, it is still random whether or not new trophies even show up. [[ThatOneSidequest The Mew Trophy is an especially bad case]]. It's bad enough you have to fight multiple characters at once while getting worn down, but the combinations are random and can range anywhere from easy peasy to downright lethal.
** Items in general make some tasks this. If a bomb spawns in front of your attack that's another multi-minute attempt at the 100-man-melee down the drain. For this reason, competitive players and tournaments often shut off items.
** Gameplay itself devolves into this, with people needing to exploit the map hazards, map terrain, or item spawns in order to gain an advantage against their opponents.
* Clearing the tutorial in ''SoulCalibur 3'' requires the player to guard impact (counter) the instructors moves while he randomly switches between high and low attacks 5 times in a row (getting hit makes you start over). The problem is that the medium attacks he uses are too quick to guard after it starts (so you need to guard before he starts) and all but a handful of characters are too slow to get out of that block and counter in time when he DOES execute a low attack, meaning the mission requires the player to be lucky enough to make a correct "prediction". To add insult to injury, the characters that ARE quick enough have this mission stupidly easy. (note:Completing the tutorial with a character unlocks their Ancient weapon. [[GuideDangIt The only other way to unlock the weapon involves reaching and beating Olcadan with that character.]] Which means you'll fight [[SNKBoss Night Terror]].)
* ''VideoGame/MortalKombat9'' has a mode called "Test Your Luck", where a slot machine determines what additional stipulations are added to a match. These extra rules range from inconsequential (rainbow blood, Zombie Kombat) to game-changing (no arms, poisoned health, disabled super meters). These missions appear at regular intervals in the Challenge Tower, where they also determine your opponent.
** Additionally, fighting [[SecretCharacter Reptile]] in the original ''MortalKombat'' (and the reboot as well) not only requires a double flawless victory followed by a fatality, but the player must "Look to la Luna"; there's a random chance of seeing objects fly across the moon. The player can only challenge Reptile if the this occurs.
** Although luck isn't strictly required to win the fights against [[BigBad Shao Kahn]] or [[TheDragon Kintaro]] it certainly helps. Both have tremendously powerful and versatile movesets that can allow them to hit you for massive damage from all the way across the arena with very limited ability to dodge or block. They both also have a tendency to stop and taunt in the middle of combat. If you're lucky they'll stand around taunting like idiots the whole battle, allowing you to [[DeathOfAThousandCuts slowly chip away at their health bar with ranged attacks]]. If you're unlucky they'll charge in immediately and spam their most powerful moves at lightning speed until you die.
* ''DissidiaFinalFantasy'' has some of these, mostly relating to the Battlegen system. Crash course: Battlegen produces unique items for synthing weapons/armor/accessories based on what the player does in battle, the "standard" set of 'gens are five items made in four ways: inflicting [[BreakMeter Bravery Break]], landing an HP attack, using an [[LimitBreak Exburst]], and damaging the stage/[[PunchedAcrossTheRoom slamming the opponent into the wall, ground, or ceiling]]. However, battlegen is never guaranteed--you only ever have a ''chance'' of generating the item when performing the above actions. That's the luck-based, here's the mission: In campaign mode, there are enemies who demand, if the player wants the highest score possible, that the player cause battlegen to occur ''within ten seconds of starting the match.'' Not even factoring in the SpitefulAI who seems to know the player's motivations and will run away instead of fight and give you a chance--the player can still do everything "right" and just be out of luck. If you're going for HundredPercentCompletion, time to restart that board!
** Much like the above example, there's an achievement for battlegen-ing five items in one match--and you can only ever generate one of each individual item per match. Thank ''God'' for the Stiltzkin opponents and their unusually long list of possible battlegen items, as they turn this achievement from "nigh impossible" to merely "hugely aggravating."
*** The sequel makes battlegening a lot less frustrating: getting generic opponent-based items is a lot easier and there's only 3 of them per character, you don't need to battlegen the more common items first to be able to get the rarer ones and there's no DP anymore, meaning nothing requires you to succeed in a battlegen within a time limit.
** If the player is deep in the Lunar Whale or Blackjack course, that is to say, running gauntlets of random enemies 20 to 50 levels above the level cap, the player's survival can quickly wind up luck-based: Did the computer give the opponent the best equipment in the game, or merely a motley assortment? Do they have accessories that complement their strengths, or worthless ones? Is their summon godly, or horrible? Is their CPU-behavior set to a playstyle the player can counter reliably? There's no way of knowing unless you fully commit yourself to fighting the opponent. Start praying.
* The fight with Jinpachi in ''{{Tekken}} 5'' comes down to this. Jinpachi has an attack that comes out almost too fast to block, interrupts any attack you perform, stuns you, and forces you to stand. He also has a fireball that takes off massive amounts of your health and which he can use multiple times in a row. The only way the player can win the fight, [[OutsideTheBoxTactic short of spamming Forward-Forward+Square]], is if Jinpachi's AI decides not to use the "stun palm" - if it does, it will always chain the stun into waves of fireballs and wipe the player out.
[[/folder]]

[[folder:First Person Shooter]]
* Many [[FirstPersonShooter first-person shooters]] task you with defeating a certain number of enemies in a given [[TimedMission amount of time]] (such as ''VideoGame/TimeSplitters''), and this often comes down to how often and near enemies [[RespawningEnemies spawn]].
* In ''[[VideoGame/GoldenEye1997 GoldenEye]]'' for the N64, unlocking the Invincible cheat requires finishing the second level, Facility, within 125 seconds. Being able to do this is largely dependent on where Dr. Doak (with whom you must speak in order to finish the level) randomly spawns. This is not a question of looking in the right place. Only one specific place renders it possible to finish the level in time.
** Not to mention the Statue level. While nowhere near as difficult as the above, if the player looked in the wrong place for the randomly generated flight recorder, he would run out of time to unlock the cheat.
* Witches in ''VideoGame/Left4Dead'' are randomly placed (if at all) each time a level begins (which means two times per map in Versus Mode). There is an achievement for successfully clearing an entire campaign without disturbing ANY witches. Guess how frequently witches are placed on choke points where hugging the wall (or worse, ledge) still gets you too close to the witch to avoid alerting her?
** Even worse if you are playing single player mode. You can go through the entire game avoiding witches. If a witch spawns in a finale, an NPC team member WILL disturb the witch without fail.
*** Made [[SarcasmMode a whole lot more fun in the sequel]] where the Survivor bots will gladly stop 2 feet in front of a Wandering Witch and let her anger rise till she freaks out and attacks. Naturally, the bots will most likely ruin your chances in getting the Sob Story achievement, where you are not allowed to kill (you can disturb every single Witch you like as long as one does not get killed) any Witches in the sugar mill map. Even worse, [[SpitefulAI they'll then try to position you between the Witch and themselves in the hopes that it attacks you instead.]]
** Sometimes a witch will be placed at the top of a ladder that you must go up in order to continue the game, and she is placed in a spot where it is pretty much impossible to shoot or see her until you get to the top of that ladder, then it only takes half a second for her to get angry and rip your face off. This is especially horrible in one player mode when you are basically forced to sacrifice yourself just to continue.
** And then there's the items like first aid kits or special ammo. Usually, if the team is doing well, you will usually just find molotovs or pipe bombs off the beaten path, but if the survivors are crippled and have nothing to heal with, the AI Director ''MAY'' spawn more health kits or other healing items, which can sometimes make or break the game.
** The entire game itself can be a luck based mission at times no matter how careful your team is. Sometimes you can go an entire game without any incaps/deaths/restarts and other times you may have to restart several times due to being overwhelmed by the infected.
*** Especially evident if you're playing with bots on any difficulty above Normal. Bots will always heal to 80% hp before leaving the saferoom. However this means by the last saferoom, you could be walking out with one or no extra medkits at all. Good luck surviving the Finale, as the bots will almost always get incapped or killed before the second tank, leaving you alone hoping that a smoker or hunter doesn't come out and ruin your day.
*** The bots themselves can also make or break the game. Either they will quickly save you if you get in trouble or they will watch you die before deciding to do anything. Especially fun when the player is grabbed by a Smoker or Hunter, and the bot is melee hitting the ''normal'' zombies around them instead of the actual threat.
** The Sacrifice campaign for the first game is like this during the finale where you have to jump off the bridge and kick start the generator. If a Smoker grabs you while he is on a rooftop, the bots won't shoot the tongue or bother to snipe the Smoker, so you'll die and have to restart, thus you have to hope a Smoker doesn't spawn when it's time to do the sacrifice act. This is somewhat avoided in the sequel in the same campaign due to having more weapons and items to defend yourself with and having more special infected types so your chances of a Smoker grabbing you is lower.
* Many levels in the ''Franchise/{{Halo}}'' series on Legendary difficulty are luck based missions due to the randomization of enemy spawns and random unavoidable death situations. Well, that's why you've got plenty of save points.
** Jackal Snipers, with their {{one hit kill}}s and near-perfect accuracy on Legendary, often create luck based situations, particularly where they spawn randomly.
** That or TrialAndErrorGameplay, whichever is more appropriate. Basically, at least in ''Halo 2'', the odds are dramatically stacked against you, and even if you play very well, you're still fairly likely to die. So you just do any given hard segment over and over again, doing pretty much the exact same thing each time, until the one time when all the chips fall just so, and you make it through. It's certainly not skill-based: if you use an optimal strategy and execute it flawlessly each time, you'll still die ten times and succeed once.
** what IS luck based is whether dying a couple of times on legendary will send you back a checkpoint. The system is meant to send you back if you find yourself in an unwinnable scenario, however, you put yourself in danger so much in legendary the game struggles to tell.
* The final battle in ''{{Killzone}} 2'' has elements of this; [[spoiler:the final boss has a teleporting ability that lets him constantly FlashStep all around you. It does make a lot of noise and give off an easy-to-detect blue light, but he moves very fast when he decides to attack and absolutely LOVES to teleport BEHIND you or directly in your path if you try to run. There's simply no telling if he'll suddenly materialize three inches from your back or if you'll run smack into him and (in either case) end up being gutted by his knife of doom.]]
** Heck, just put in the whole of the battle leading up to that fight; [[spoiler: the player is attacked by what amounts to a battalion of elite soldiers, numbering up to at least 40 vs 2. Your partner is stupid. And the Helghast have the smarts to flank you from almost every direction with not only machine guns, but also flamethrowers and rocket launchers...just ''try'' to survive all that in one go on Elite difficulty, if at all.]]
* A number of combat-oriented shooter missions - such as in ''Men of Valor'' and ''VideoGame/CallOfDuty'' (or thereabouts) - where you have to run through an artillery barrage to a foxhole or somewhere to get to the next stage, and it's up to chance whether you go down or not while running. Such as the second half of "Heat" in ''VideoGame/ModernWarfare'', where you go from [[HoldTheLine holding the line]] to running back through it.
* In H.P. Lovecraft-based FPS ''VideoGame/CallOfCthulhuDarkCornersOfTheEarth'', the fourth mission has the player riding in the back of a pickup truck while the driver navigates the streets of Innsmouth. As firearms are extremely inaccurate (and you're shooting at things that don't take that much damage from them), there's very little point in shooting back, and if the game decides that the swarms of inhuman monsters taking potshots at you are accurate enough to overwhelm your first aid supplies, you're going to be doing the level over. And over and over and over...
* The first three PC ''VideoGame/RainbowSix'' games can be a crapshoot with the semi-random positioning and movement of the tangoes, espcially on Elite difficulty, where they often headshot you as soon as you poke your head around a corner (sometimes even on the "normal" difficulty setting), and during {{stealth based mission}}s where you have to avoid being detected. Cases in point: in ''Rogue Spear'''s Arctic Flare mission, if the two tangos outside the control room are facing towards the stairs as you come up them, they WILL alert the bridge guards, resulting in the ship being blown up or hostages being killed. Often, [[TheAllSeeingAI they seem to already know you're coming]]. On "Perfect Sword", sometimes the tangos will come downstairs after the sniper fires, sometimes they won't. If they stay holed up upstairs, you're more or less fucked, as its nearly impossible to clear the room without a hostage being killed.
* On ''MedalOfHonor: Allied Assault'''s Hard (read HarderThanHard) difficulty setting, many levels are practically impossible to pass without SaveScumming, particularly where there are randomly RespawningEnemies, and with [[TheComputerIsACheatingBastard the computer being a cheating bastard]]. For example, Omaha Beach, where even if you flawlessly dodge the machine guns, you'll still get randomly killed by artillery shells. And Sniper Town, with its randomly-placed hitscan snipers. Earning some of the medals is also luck based, particularly the Sniper's Last Stand and Storming Fort Schmerzen levels, where a certain number of RedShirt comrades must survive.
** The exact same applies to the missions in ''VideoGame/CallOfDuty'' where you have to outrun artillery.
** Same for most ''COD'' games on Veteran difficulty, with the random enemy spawning, near-instant death shots with pinpoint accuracy, and {{grenade spam}}ming. Especially the original, which lacked {{regenerating health}}, and removed all medkits on Veteran.
* The first boss of ''{{Descent}}'', between the boss's random {{teleport spam}}s and {{Macross missile massacre}}s, and the population of DemonicSpiders (Super Hulks and Class 1 Drillers) in its lair. Especially if you're trying to save the hostages on Insane skill. In fact, many of the levels are this on Insane due to the [[RoamingEnemy random roaming nature]] of many enemies.
* ''Sniper: Ghost Warrior'' features an escape sequence in which you must swim across a lake while being shot at by at least 3 enemies with near-perfect accuracy and no way to fire back at them. Surviving the segment boils down to winning enough of their accuracy coin-flips to reach the other side. Did I mention you can't dive under the water? This is one of [[NonindicativeName many escape scenes you WILL be shot repeatedly during]] but it stands out for offering absolutely no way to retaliate.
* ''VideoGame/{{Receiver}}'' has two sources of this: the level is generated randomly, and your starting loadout is generated randomly. Given that there is no EmergencyWeapon, therefore, starting with exactly ''one bullet'' is a major handicap.
* ''PAYDAYTheHeist'' can be either smooth sailing or a nightmare to trudge through thanks to the special units of the SWAT teams. Tasers will use said weapon to shock you to death, which freezes you in place and makes you fire your gun uncontrollably. Shields will use said shield to flank you and require to be hit from behind. Cloakers can instantly down you. Bulldozers have high firepower and can only be shot in the face. There has been many cases where a single cloaker wiped out all four players and bulldozers plowed through even the most hardened players. And you can get multiples of the same special units coming after you.
** Any level that requires you to use a saw, drill, or hacking device. The items will jam or stall at some point, but how many times they stall is random.
** Several levels are mostly or purely luck based:
*** Diamond Heist forces stealth upon you if you want to get to the diamonds without trouble. If a guard spots you before then, you're forced to install the hacking devices on the alarm boxes and make sure they don't jam as the SWAT team come rushing in. Even if you get to the vault without being discovered, it's randomized on whether or not the codes work. If the codes work, great. If not, you're then forced to find the CFO (and your cover is blown by then), take him to the roof and have Bain pick him up for some negotiations. The CFO himself is also luck based on whether or not he gives up the code. If he does, then you can get to the vault. If he refuses to give up the codes, then Bain kicks him out of the helicopter to his death and you will have to find another person who can give the code. You will get the diamonds no matter what, but how you get them depends on whether or not the game wants you to succeed.
*** No Mercy also has a ton of randomization in nearly all of its objectives. In the first part, you have to destroy several cameras, but they are in random locations and the more players there are in the game, the more cameras you will have to destroy and you only have 7 seconds to destroy them either way. Once you do, you then have to keep the civilians down and make sure they don't run off to trigger the alarm and yes, where some of them are located are also randomized. When you are going through the computer and then searching for a specific file, you may get some events where someone may come up to the hot zone, to which you will have to yell at them to stay down, or if they are a guard, kill them.
*** Should the alarm go off in the No Mercy level, the ICU gets sealed and you have to hack it away with a saw, and then use the saw again on one of the 3 isolation booths and hope the first one you picked has the patient you are looking for. On top of this, even when you get the blood samples, you have to get them validated and it's randomized on whether or not they will be successfully validated. Even worse, when you call the elevator, how many times the cops cut the power is random.
* Many of events in ''VideoGame/ModernWarfare'' on Veteran depend on luck to some extent to overcome, but [[ThatOneAchievement Mile High Club]] is above and beyond the call of duty, so to speak, with the combination of a [[TimedMission one-minute time limit]], cramped quarters combined with swarms of tangoes, unpredictable enemy behavior, ArtificialStupidity by your teammates, and the tendency for enemies to NoSell your flashbangs half the time.
** Even on Regular difficulty, there are still a few sections of the games where your survival depends more on how accurate the enemy's shots are rather than any skill on your part - "Bag and Drag" from the third game in particular, where you're in a car chase and as such have no option to hide from the barrage of enemy bullets being fired at you. Dying seconds after moving to the back of the van for the first half without being able to do a thing about it is extremely common.
*** The Car Ride stage in the first ''Call of Duty'' had similar fake difficulty.
* ''VideoGame/{{RAGE}}'' gives the achievement [[ThatOneAchievement "JACKPOT!"]] for rolling four kills on your first roll in the Tombstones MiniGame. Yeah, an achievement for getting a particular result on a dice roll. The odds are 16:1 against on the face of it, and that's assuming Creator/IdSoftware didn't weight particular rolls. Likewise the achievements for completing the other minigames (e.g. an in-universe trading card game).
* Several ''VideoGame/{{Borderlands 2}}'' Badass Rank Challenges and achievements depend on luck. For instance, the "Jackpot!" challenge requires playing the slot machines in Sanctuary until you win either a big pile of Eridium bars or an ultra-rare weapon. Statistically, you have a roughly .25% (about one in 404) chance of either of these spins coming up. Another achievement requires a natural 20 or a natural 1 during looting in Tiny Tina's RPG session, but at least that one's less frustrating than the slot machine challenge, in that you're not obligated to spend anything.
[[/folder]]

[[folder:Miscellaneous Games]]
* ''{{Action 52}}'' is notorious for its enemies spawning in random places and shooting at random times.
** Especially Micro Mike where sometimes a screen will be flooded with so much enemies that slowdown and death is unavoidable. There's also a small round bullet type of enemy which spawns randomly at random part of the screen, sometimes appearing ''behind you'', making a hit unavoidable. It's even worse, given the Action 52 collision detection. Chances of even completing the first level is about 1/50 while the rest is up to skill.
** Bad enemy combination can result an almost instant game over in ''Hambo''.
* The fan remake of ''StreetsOfRage'' has this for the final level if you defeat Robo X. You have 3 minutes to disarm a bomb in the building or ignore it and try to escape and beat Shiva before the bomb explodes. To disarm the bomb, you have to find a room with a computer console which you can destroy to disarm the bomb. To get to the bottom floor, which is your escape route, you have to find a key card. The 3rd and 2nd floors each have 3 rooms. 4 of them are trap rooms filled with mooks and electrical traps. The other 2 contain the computer console and a treasure room filled with money, health items, and the key card. However, don't be fooled into thinking that once you know where the rooms are that you can go to them every time you play this level. The game ''randomizes'' what rooms will have the key card and computer every time you play this level. Oh, and don't forget you only have 3 minutes to actually figure this out before you're blown to bits and get the BadEnding.
* The iOS game ''Lego Minifigures'' is a game where you need to match up a minifigure's head, legs, and torso. The problem? ''All of it is luck-based''. It plays exactly like a slot machine, and the only way to add a minifigure to your collection is to hope that it will somehow get it right. If not, you have to keep spinning.
* The ''Find Mii'' minigame on the VideoGame/StreetPassMiiPlaza. Each Mii you find or hire with play coins has a different spell depending on what color of shirt they wear. The 12th room of the tower is completely dark and the only way to progress is to have a hero with a white shirt so he can use his spell to light the room, all other heroes just leave when they see the darkness. Meaning you'll have to wait until you come across someone with a white Mii or until the game gets generous enough to give you one when you're hiring. Oh, and all other heroes before the white one will be lost. Thankfully, you only need to light the room once.
** This has been somewhat averted in Find Mii II, since now you can re-hire people you've tagged with Street Pass. You still need to have found Miis of the color required in order to do it, but once you have at least one, it becomes a lot easier (especially since the new obstacle rooms may now require 2 Miis instead of one).
[[/folder]]

[[folder:MMORPGs]]
* See also: "TwentyBearAsses"
* There are several ''VideoGame/WorldOfWarcraft'' raid bosses that are luck based. Kel'Thuzad in 25-man mode Naxxramas will periodically Mind Control two raid members at a time, and frequently picks healers. Other examples are bosses that require strategic movement but rather then using a timer to time their abilities, have a cooldown, and free choice whether to use an ability or not. The most annoying aspect of this is Akil'zon in Zul'aman, where you must collapse to avoid his Electric Storm, but often, he will instead use several Static Discharges, annihilating your group.
** A better example might be the Valentine's Day "Be Mine!" achievement, which required you to create eight candies from an item that generated one at random ten times. The random number generator was fickle that week.
** Holiday achievements in general can be these sometimes, especially the infamously aggravating Hallow's End holiday, which requires no less than three achievements that are completely reliant on the RNG to gain progress towards (Getting toothpicks, getting enough tricky treats to eat yourself sick, and getting an impossibly rare drop of ''both'' a pumpkin vine companion pet and a jack-o-lantern helmet.)
** The "How to Win Friends and Influence Enemies" quest in the Death Knight area requires the player to extract information from Scarlet Crusaders. This is done by equipping a pair of pokers and attacking the mobs, with a chance on a hit that they'll talk. The enemy talking is so completely random that the quest can take anywhere from a few seconds to over an hour.
** [=WoW=]'s end-game consists of your raid doing one dungeon or group of dungeons until you gear up enough to do the next higher difficulty. Early on, the gear was class-specific and [[RandomDrops dropped completely randomly from bosses]], meaning you could have Molten Core on farm but still not be able to move on because you keep getting hunter gear and your tank just can't get that helmet he needs. This has been improved since then, with gear/class homogenization making you more likely to be able to use a drop and tier sets being bought with looted tokens that can be used my multiple classes.
** One of the best and still most relevant examples of luck in WoW are mount drops. Certain raid or dungeon bosses have a very small chance to drop a rare mount, the odds of you winning the mount are even less than that due to there usually being anywhere between 4 - 24 other people who can all lay claim to it. The most (in?)famous example being the Rivendare Deathcharger, it used to have a 0.1% chance of dropping (now has a 1% chance) and guilds were known to have split up over who got to have it. Right now it is solo-farmable, but people still often hill him several ''hundreds'' times and get nothing. Honorable mention being the Ashes of Alar, which still has a 0.1% drop from a boss that can only be defeated once per week (and still requiring at least some teammates) as opposed to Rivendare who could be fought several times per hour.
** Some of the daily quests are based on random drops, particularly the fishing dailies in which players must catch a certain type of fish that can only be caught on the quest. In the Icecrown daily Slaves of Saronite, the player must talk to and free slaves, who will either 1)run to freedom, 2)[[DrivenToSuicide commit suicide]] or 3)[[BrainwashedAndCrazy attack you]]. Only the first counts toward your total.
** Halfus Wyrmbreaker was this in the early stages of Cataclysm, depending on your raid configuration. He would have a random set of three out of five drakes each week, which would influence what abilities he would use, and would have to be released and killed to weaken his abilities and put a damage increasing debuff on him. General consensus is that the Slate Dragon (who gives him the abilty to inflict a healing debuff) and the Storm Rider (which gives him the ability to launch a powerful AOE that is cast too quickly to be interrupted until the Storm Rider is released) gave him the most deadly abilites out of the five, and the presence of either would make winning nearly impossible for a group just starting Cataclysm raiding.
** Lord Rhyolith cranks this ''UptoEleven''. Success on this boss is entirely dependant on where he chooses to spawn and then ignite volcanos that he must then be guided to break by stepping on. These volcanos apply a constantly stacking debuff that increases the raid's fire damage taken. Basically, he can spawn and activate a volcano right in front of him and then step on it causing minimal damage or he will spawn it on the other side of the map which he won't get to any time soon as he moves very slowly. This sheer luck based fight earned the ire of many players who considered him harder than Ragnaros (the final boss of this raid) depending on how lucky they were. It also earned him the nickname Lord Random. Since his release he was toned down various times and is now more managable, but can still wipe a raid with an ill-placed volcano or two.
* ''MUD II'', descendant of the very first MUD (Multi-User-Dungeon) requires the player to touch the touchstone in order to obtain the ability to use spells. Failure means instant death, with the chance of success being a function of the player's level. Since the use of magic becomes almost essential in later levels, most players touch it with an approximately one-in-six chance of dying, having spent a not-inconsiderable amount of time grinding to that level.
* ''EveOnline: Apocrypha'' introduces reverse-engineering which is doubly luck-based. You have approximately 30% chance of a successful job, then a 25% chance of that job producing the desired result. That's right, a net ''7.5%'' chance of getting the desired result.
* ''KingdomOfLoathing'' is full of {{Fetch Quest}}s that require you to obtain [[RandomlyDrops randomly-dropping items]]. Sometimes you can plan things so you're levelling up decently while searching for that elusive item, but sometimes you'll find yourself looking for it in an area several levels below where you "should" be.
** Also parodied with one subquest which consists entirely of "press a button until you roll an 11 on 2d6. If you roll anything else, you take damage". Of course, a 10-leaf clover, which has already been introduced by that point as an item granting the player luck for an adventure, will make you always roll an 11. (Except in one mode where clovers aren't available - so loaded dice are substituted.)
*** However, if you're in Hardcore and want to go to Bad Moon, you must not use 10-leaf clovers. Including the above. What used to be harmless is now not so harmless.
** There have been multiple incarnations of delay features implemented; completely divorced from the whims of the RNG, you ''won't'' find the thing you're looking for for a certain number of adventures in the appropriate area after you've been told to find it. Of course, once you've expended those adventures, you still have the RNG to contend with, and it is a fickle beast indeed. The delay system has met with varying levels of outrage, so the devs rigged the formula for determining the delay so that it's always "5" until they can come up with a better solution.
** The RNG got so famous/infamous that it became [[http://kol.coldfront.net/thekolwiki/index.php/The_RNG a character.]] It sometimes applies "blessings" or "curses" to players for being polite or rude to it, though these effects don't actually do anything. [[ParanoiaFuel Probably.]]
** To get the [[DepartmentOfRedundancyDepartment Brass Bowling Trophy Trophy]], all you have to do is pick it up during the [[spoiler:Strange Leaflet Quest]]. Problem is, it isn't always there. There's 4 other items that can appear in its place, all of which are useless [[note]]Well, they provide a clue to a hidden sidequest within said Quest, one which is unavailable if the Brass Bowling Trophy Trophy is there[[/note]]. If the trophy isn't there, you have to ''play through the entire game again'', which takes a few days at the very least, for another 1-in-5 shot at getting it.
* Back around Christmas 2011 a Steam promotion for ''VideoGame/ChampionsOnline'' involved a gathering mission. The basic idea was that players had to get through the tutorial mission and then go around the main HUB finding Christmas gifts in typical packaging, and take the items from said packages after taking 5 seconds to open them. The main problem was that straying too far from the hub would probably get you killed instantly by mooks at a higher level than you. Most of the gifts appeared in areas right next to combat zones, so coming down in an area with a gift and waiting for it to be picked up would probably get you slaughtered before you could retrieve the quest items. Add to the fact that gifts may not contain the required item 100% of the time, and also add to the fact that other players would be going around looking for the gifts too, and ALSO add that you might be attacked from one of these crates as well, made this a slog that could take well over 3 hours to finish.
* In one high level RuneScape quest, you confront TheDragon with a companion, who enrages said Dragon and gets attacked. The luck comes in when you realize your companion has fairly low HP, and can easily get trashed by the boss in a few good hits. Since you can't give your companion food, it all comes down to whether or not you'll whittle the boss' health down before he kills your companion.
* The crafting in VideoGame/FinalFantasyXI is entirely based on equations depending on your level in a particular craft, the level of the recipe you're trying to make, and luck. And there is a cap on your success rate below 100%. So your level 110+3 Cook could catastrophically fail to boil a carrot, though the chance is very slim. Whether or not you "HQ'ed" a synth was also dependent on certain factors plugged and a random number generator.
* VideogGame/FinalFantasyXIV crafting is slightly different. You essentially have a progress bar and an quality bar. When the progress bar is filled, the synthesis is successfully completed, and if the quality bar is filled, it's a 100% high quality chance. If the quality bar is less than full, you get a certain percentage chance for an HQ result based on how full the bar is. However, the abilities you use to fill these bars, particularly the ones used to fill the quality bar, have a chance of failing. Gear and actually ability has no effect on the failure rate of these abilities. So it's still mathematically possible (though if you're smart with your abilities, it's less than .0001%) for a capped crafter to botch a level 2 synth. It doesn't help that [[TheComputerIsACheatingBastard players swear that 98% chance of HQ synths result in NQs more often than 2% chance of HQs actually HQ.]]
** Worse in FFXIV is Atma Farming. You need 12 Atma as to upgrade a relic weapon past a certain point. These Atma drop from completing Full Active Time Events (FATEs), which are little scenario battles that pop up in the overworld. The Atma dropping is entirely luck based, and your luck is going to absolutely '''suck.''' It's entirely common to spend 5 hours FATE grinding to not get a damn thing. Not helping the "I'm Not Having Fun" factor is the fact that FATE grinding is widely believed to be the most sole crushingly tedious thing in the game. Also, you have to do this for ''every'' relic weapon you want upgraded, and every job has their own relic weapon.
[[/folder]]

[[folder:Party Game]]
* ''VideoGame/MarioParty'' is one, big Luck Based GAME. This is especially evident in Mario Party 3 - The mini-games Stacked Deck and Merry-Go-Chomp are entirely based around luck, so much that the player has absolutely no input.
** Two [=LPers=] of the game - in their third round - came up with a hidden block on the first turn. Containing a star. [[http://www.youtube.com/watch?v=hOMdwC8fKZ0 It went downhill from there.]]
*** LetsPlay/TheRunawayGuys had what is arguably the biggest stroke of luck in regards to hidden stars ever recorded: LetsPlay/ChuggaaConroy has found 2, LetsPlay/NintendoCapriSun has found 1, and LetsPlay/ProtonJon found THREE STARS IN ONE 20-TURN GAME. He only needed to buy ONE star in the entire game, at which point he ended up with SIX.
*** [[http://www.youtube.com/watch?v=tVsgOKu7uZk Watch]] [[http://www.youtube.com/watch?v=sCqKF3pqj5Y this]] [[http://www.youtube.com/watch?v=WzxekOFa6ew game]] [[http://www.youtube.com/watch?v=cvkczDuLVdI here]]. Rawrzaur wins the ENTIRE game without EVER buying a star himself. He won through nothing but sheer dumb luck, and the reactions of his friends who were playing alongside him are as would be expected.
** Get a Rope from ''Mario Party 5'' is the literal version of luck based mission. Pull a rope, hope you get the better result than the opponent. Completely luck based; you don't even have to press a button.
** And, of course, there's the board games themselves. Then again, board games in real life are oftentimes Luck Based Missions.
** Really, some people think that the reason the ''VideoGame/MarioParty'' series began to decline is because more and more of the minigames became luck based.
** At the end of Mario Party 9's solo mode, it's you, an AI partner that hates you, and two smarter than your partner AIs that, if they win, make you start the level ALL over! The kicker, the Boss minigames(the ones with the most mini-star value) are pure dice rolling.(okay, the Bowser requires dodging but still,) Expect Shyguy and Magikoopa to have improbable luck and win both of these while your "partner" ruins your chances of winning by getting you fourth and then getting third itself.
** It's debatable if skill can be used, but Mario Party 2's Chance Time can change who wins in one turn because one of the outcomes is ''swapping stars''. Did you happen to choose who was in first and who was in fourth? Sucks to be that guy.
** Special mention goes to the Bowser's Big Blast minigame in the second game which is pretty much the Mario Party equivalent of RussianRoulette.
* Family Game Night 3 featured video game versions of various Hasbro games, one of which was Mouse Trap. ANY achievement related to Mouse Trap was innately luck-based as Mouse Trap is simply rolling dice until someone wins.
** In addition, the game featured a Yahtzee-like card game which is basically making poker hands until someone wins. While this game allowed for SOME strategy, the achievement for making 6 hands in a single game is essentially luck based as all you can do is HOPE you are dealt better cards than your opponents.
** The achievements for winning Spin-To-Win (in the Game of Life) and pulling over another player for speeding (rolling a 10) are innately luck-based as well.
** One of the Wii games has a minigame that quite literally amounts to "Russian Roulette with catapults".
[[/folder]]

[[folder:Platform Game]]
* The last encore level of ''VideoGame/BattleBlockTheater'' is made almost entirely of exploding platforms. There are tons of cannons firing down at you at all times & their shots move fast enough to come on screen during a jump & kill you during that same jump. Dodging a projectile usually requires you to stop or jump at which point you usually either get hit by a line of projectiles from out of nowhere or fall in acid because the platform under you exploded. The timing of the shots is randomized to some degree too.
* {{Fishing minigame}}s, such as that in the GBA port of ''VideoGame/DonkeyKongCountry'', often have a luck component to some degree. The worst ones are almost entirely luck-based.
** Also from Donkey Kong Country, there's a DK Coin in the second game, towards the end of ''Web Woods'' that's at the end of the target barrel cycle (only in the SNES and GBA versions; the GB version, Donkey Kong Land 2, has this coin elsewhere). The catch? It's only there for one micro-second. If you are even a frame late, you won't get the coin. Oh, and the level is quite long. Mudhole Marsh in the fourth world has a similar situation, but you have a bit more time before it goes to the next item.
* The game ''AlexKidd and the Enchanted Castle'' for Sega Genesis takes place on Planet Paperrock. Accordingly, the player has to play Rock, Paper, Scissors to gamble for power up items, at a highly increasing cost over the course of the game. Each boss fight is a series of Rock, Paper, Scissors matches.
** ''PrincessTomatoInTheSaladKingdom'' also revolves boss fights with Rock, Paper, Scissors, but goes a step beyond. If you win a round, your opponent's head starts spinning and for the round to count you have to guess which way they'll be looking when you press the D-pad. I think they had to do the same thing if they won a round, but still...
*** There was at least one case where they dropped you a hint: a character tells you that another character in the game "hates scissors," meaning that he'll always choose Paper in the first part. Though you still have to randomly guess which direction he'll look in the second part.
* In ''VideoGame/MegaManX5'', there are two ways to prevent the space colony Eurasia from crashing into the Earth, but their odds of success can only be manipulated to a point. The laser will almost never succeed no matter what you do, and the space shuttle will sometimes fail even if you gathered all its parts. You can also affect it with who you've been playing as for most of the game, someone who uses Zero a lot has a better chance of him [[spoiler: not succumbing to the virus, as the game won't remove him due to how frequently he's used.]]
* An already NintendoHard freeware game by the name of ''[[http://www.superfundungeonrun.com/dungeon.zip Dungeon]]'' (download link) is this taken to its logical extreme. [[spoiler: Depending on your computer's name, your username, your RAM, and your hard drive (and maybe even your Operating System), the game picks a bug to inflict on you. This can range from merely changing level names around to making the game completely unwinnable due to fast enemies or spikes being one pixel taller. "Bugless" version is [[http://www.superfundungeonrun.com/dungeonv2.zip here]]]]
* The first special stage of ''KaizoMarioWorld'' requires the player to perform a leap of faith over (essentially) a BottomlessPit and hope that a fish jumps up at the right place for them to bounce off and continue. There is no set pattern to how the fish appear at all, meaning the jump comes down to pure luck. As Wugga said during his LetsPlay of the level:
-->''"How is this good gaming design?"''
* The emerald/key hunting missions in both games of the ''VideoGame/SonicAdventure 1'' and ''[[VideoGame/SonicAdventure2 2]]'' can come down to this, especially in the latter title. The worst case is Security Hall. In any other hunting levels, if you take too long, you just don't get as good a rank, at least on the first mission. Here, if you take too long, you lose a life. The fourth mission imposes a time limit with the same penalty on ''all'' stages, making the hunting stages a definite example of this. At least the fourth missions are optional with regard to finishing the stories, but you still have to beat at least one hunting stage with a time limit in order to progress.
** Ironically this is averted for the 5th Hard Mode missions which makes them cake walks. In line with being harder, the emeralds are kept in very hard to find and difficult to reach locations... however said locations are always the same, so you could easily take a huge amount of time to complete with an abysmal rank your first time, then retry and get a fast 'S' now that you know where to go.
* ''VideoGame/IWannaBeTheGuy'' has [[Franchise/{{Castlevania}} Dracula]]. He's the only completely randomized boss, and can be an incredibly difficult fight, even by ''IWBTG'' standards.
* The boss of the Asteroid Coaster in ''VideoGame/SonicColors''. Beating him isn't hard, but you have only a ridiculously small chance of netting a high enough score for an S-Rank. To maximize your score, you have to use the Rocket Wisp every time the boss warps away (and the Rocket Wisp randomly appears from crates the boss throws at you and sometimes doesn't show up at all). And destroy all of the component parts of the boss before destroying his core (using the finicky homing attack). And collect lots of rings (and ''keep'' them to the end of the fight, which means you can't get hit at all). And rack up the quick step bonus as much as possible (constantly jerking Sonic back and forth whenever he isn't attacking). And, of course, be quick about it (take longer than 2 minutes and you may as well start over). The odds of all that coming together is astronomical, and has next to nothing to do with your skill.
* ''Impossible Mission 2'' had an infamous ending sequence: in the final room of the game are 3 identical computers. Using one of them will win you the game. The other two will instantly end the entire game regardless of remaining time or lives. Which computer is correct is randomised each game and There are no clues, in the game or in the manual, to tell you which is the correct computer. And you can't restore, so you'll have to start again from the beginning. This was likely done to hide the fact that, as with many Commodore 64 games, the ending was awful.
[[/folder]]

[[folder:Puzzle Game]]
* In ''{{Minesweeper}}'', since the boards are psuedo-{{randomly generated|Levels}}, you can easily end up with situations where there's no way to [[http://www.bbc.co.uk/dna/h2g2/A337097 logically determine]] where the remaining mines are, and whichever square you click has an equal chance of containing a mine. Since the board is fixed after the first click of the mouse, you don't even get the mercy of SchrodingersGun. On top of that, some versions of the game are luck-based ''right from the very beginning''. As the field is entirely obscured at first, it's perfectly possible to step on a mine in your first move.
** In the standard Windows version of Minesweeper, the game is configured so that you cannot possibly hit a mine on your first move (i.e. the playing field is generated based on your first move to avoid generating a mine there). This is easy to see when the number of mines greatly exceeds 50% of the playing area when custom fields are generated, yet you still can never lose until the second click. Other renditions, however, are not always so fortunate. Regardless, any moves other than the first can easily be luck based.
** Some incarnations of Minesweeper go the other way and avert this trope entirely: they generate the board based on your first click and ensure that there is a logical solution.
* Perhaps this is not the experience all players will have, but ''ResetGeneration'' feels as though the entire game is built around luck and coincidence. If the right items drop in the right place, it's easy for anyone to completely wipe out the other players. Much of the time there seems to be very little strategy required at all; if a particularly useful item drops into your territory and you're able to defend it from being destroyed by cannon shots (an easy task), your opponents won't stand much of a chance... Unless an equally useful item falls into THEIR possession.
** Plumber is actually a very [[GameBreaker broken]] {{character|SelectForcing}} in this regard. Items are usually the difference between victory and defeat, and his power allows him to fetch nearby items without actually walking to them, basically giving him weighted dice as far as item drops go. Basically, he's the High Priest to the RandomNumberGod. It certainly doesn't help that he can grab a full-power-charge item, taking away his opponent's chance to grab it, and then grab another one as he pleases.
* The latest version of Solitaire (Klondike, specifically) that comes ensuite with Windows Vista has the audacity to inform you that you've lost, even when it deals you a literally unwinnable game. It doesn't help that it now keeps a running tally of wins and losses.
** Free Cell, in contrast, has only one UnWinnable game out of the ~32000 it will randomly deal.
* The item crafting and spell learning mini-games in ''VideoGame/PuzzleQuest: Challenge Of The Warlords''. You are almost completely at the mercy of the board's configuration when it comes go gaining the requisite number of anvils or scrolls to gain the sought item, and if you run out of legal moves, the game ends and you have to start over.
** The final battle with Lord Bane - especially if you're primarily a magic user: Bane literally gets stronger as the match goes on, thanks to his ludicrously low-cost stat buffing spells. You basically have to pray your spells don't get blocked (too much) and you don't get uber-cascaded into oblivion. If Bane gets rolling early, you're pretty much meat, not matter what class you play as.
** The sequel, ''Galatrix'', runs with this: adding time limits to the Gate Hack mini-games (and the cascades that would help you in battle work against you, since the clock keeps running and you can't make a move until they stop) and junk blocks to the rest or the mini-games.
* The entire game of ''TrashPanic'' on PSN is luck based. It is a physics based Tetris style game, but the objects do not have uniform dimensions like the blocks of tetris, but consist of things like guitars and toilet bowls, making this game [[NintendoHard very very difficult]].
* The independent game ''Osmos'' is built entirely out of this trope. While the developers claim that the [[AlwaysABiggerFish eat-blobs smaller than you and avoid bigger ones that eat you]] gameplay has a strategy to it, in reality (especially in the later levels) the only strategy involved is to reload the game constantly until you get a starting position that has blobs you can actually eat.
* ''PuyoPuyo'' can be this at times, especially with higher levels where the pieces drop almost instantaneously and the AI is ruthless.
* ''VideoGame/ImmortalSouls'' is a sort of cross between ''VideoGame/PuzzleQuest'' and ''VideoGame/{{Bejeweled}}'', where you have to match up colored tiles to take down matching color armor on your enemies. Meanwhile, using the wrong color on the wrong armor is much less effective. As a result, getting the right tile/armor matchup can make a battle a breeze, while getting the wrong one can make a battle drag out over multiple turns. And unlike you, your enemies never miss and always deal the same amount of damage. Then add on some enemies which have two or more different armor colors (usually bosses or the Templars), and it can take either grinding your attack stats or repeated attempts at getting good luck to win. Argh.
* ''VideoGame/CandyCrushSaga'', a game that is also similar to VideoGame/{{Bejeweled}}, has some levels which can be incredibly frustrating, but later levels introduce [[TimeBomb Candy Bombs]] that will go off after a set amount of moves. However, some levels have them so tightly set up that it is almost impossible to take out the bomb in the set amount of moves unless if the candies are there.
* Many a run of ''VideoGame/{{Tetris}}'' has ended because the game denied a piece crucial to recovering out of an otherwise-unmanagable stack, something that could've been avoided with a different roll of the RNG. This is why newer games, such as ''VideoGame/TetrisTheGrandMaster'' and official ''Tetris'' games falling under the "Tetris Guideline" use [[AntiFrustrationFeatures randomizers tailored to curbing piece droughts]].
* ''Videogame/TheImpossibleQuiz'' is virtually unwinnable on a first playthrough for even the cleverest thanks to it's InsaneTrollLogic questions. And then some of the questions have a different answer every time, making it a luck based mission even if you memorized the answers.
[[/folder]]

[[folder:Real Time Strategy]]
* Pikmin 2's Challenge Mode has a luck-based level called Concrete Maze. It has 3 floors. You have a strict time limit on each floor. The first floor is a maze with randomly placed destructible walls blocking most of the dead ends, a key behind one of the randomly placed walls, & a buried exit behind another one of the randomly placed walls. The buried exit will only emerge after you get your pikmin to take the key to the ship (which takes a really long time if the key is really far from the ship). The second floor is like the first floor but it's bigger, it has way more paths, & bomb carrying spiders randomly fall from above to suicide attack you & your pikmin. All you have to do on the third floor is throw your pikmin into flowers to get more pikmin & have your pikmin get some treasure for you that's laid out for you. That floor is really easy if you don't assume you need to be careful about which colors of pikmin you get from the 3 flowers (which change colors every few seconds so going for specific colors takes a while).
* Certain missions in ''VideoGame/CommandAndConquer: Tiberium Wars'' depend heavily on chance. One of the most painful ones is Operation Stiletto, a Nod mission where you have to capture the Construction Yards/Drone Platforms of four separate bases, all intact. If any of the Yards/Platforms are destroyed, you automatically lose. The problem is that the GDI and Scrin forces are fighting each other, and will gladly destroy their opponents' bases, including the buildings you need to protect, forcing you to simply hope they don't break through each others' lines until you can build up your forces enough to stop them.
** Another example was the [[ScrappyLevel 6th Nod mission]] in ''Tiberium Dawn''. You had to do a suicidal run into the middle of an enemy base in order to pick up a package with a small, fragile strike team with no reinforcements, and then reach an evac helicopter on the other side of the map - ''all while being harassed by enemy patrols''. It basically came down to praying that the enemy would ignore at least one of your units while you make the escape to the helicopter, or else it'd be gunned down helplessly.
** There was another Nod mission similar to that in Tiberian Sun. You had to send a small force through GDI infested territory to recapture a Scrin ship, then storm Vega's base to retrieve the Tacitus. Getting the Tacitus was a matter of sending your two Attack Buggies in, praying all the forces attack them, then sending a Scout Cycle in to destroy the train car and finish the level. If any of the enemy units opened fire on the Cycle, you were screwed.
* The underrated game ''{{Constructor}}'', upon reaching certain stages in house construction, would make certain demands of you to build X number of houses/facilities on one estate with X features. However, it also imposes varying arbitrary quotas on how many houses of each type you're permitted to build. If, upon reaching the penultimate stage in the game, it asks you to build the wrong type of house, the quota will forbid you from building enough and you'll be sacked (Read: Taken out of your headquarters in a coffin while you're sleeping and buried alive).
* ''EuropaUniversalis III'' lets the player play ANY nation that is implemented into the game and existed historically during the time period. This includes historical strategy gaming mainstays like France, England and the Netherlands, but also tiny minor nations like the Irish kingdoms of Leinster and Connaught. Playing one of the Irish minor nations basically depends on little other than whether England will want to annex all of Ireland early on, and whether England gets into enough trouble with the French, Scottish and Burgundy.
** This is valid for ''any'' country in any given game made by Paradox team. There are almost '''no''' certain things here, even for mainstays. From the moment you start the game, it's alternative history of humankind. Random events can make or destroy continent-spanning empires in few years (or weeks in HeartsOfIron). RandomNumberGod is one of most important factors in battles, sometimes more powerful than technological, numerical and tactical advantages and God help you if you ''don't'' have those advantages. Later add-ons for [[EuropaUniversalis EU3]] takes it to extreme in terms of succession. It's entirely possible to inherit half of the continent via sheer luck and single, long-forgotten pact... or see how powerful empire is balkanized into bunch of laughtable weak states after succession mess or revolt created by [[MemeticMutation sighted comet]].
** Playing as weak or very minor country tends to be SelfImposedChallenge not because the skill needed to succeed, but because it's usually sheer luck that allows you to stay afloat for first century or two.
* ''{{UFO After|Blank}}math'' base defence missions, which randomly scatter your men. How does trying to take on whole squads of laser-toting aliens with your weakest member because the rest of the team is in a different room sound?
* ''LeagueOfLegends''. It is similar to ''{{D|efenseOfTheAncients}}otA'', which means it is a 5v5 real-time tactics game. It is not designed to have significant random elements. However, if you do not bring a full premade team of 5 people, the automatic matchmaking system will roll the dice - and god knows who you will get as your teammates. They may end up being terrible players while the enemy team may well consist of a perfect composition of the five best champions at their respective roles playing together like clockwork, pushing straight to your base and stopping only to fling a quick 'gg noobs I ***ed your mom' at your head. If this happens, there is absolutely nothing you can do no matter how skilled you are: you lose.
** Matchmaking has gone through enough changes so that players are at least attempted to be matched with others of the same hidden skill ranking. What this does not account for are players that leave the game, players that intentionally feed, players that troll, or players that are [[CripplingOverspecialization highly skilled in only one role/champion]] and play like someone of a much lower skill rating if they try anything else. It's worth noting that while you may end up with ''mostly'' good teammates, all it takes is one bad apple to effectively turn it into a 4v5 which, going by how the game works, is almost always a foregone conclusion (assuming the enemy is equally competent).
* VideoGame/{{Age of Empires|I}} has what may be one of the most awful instances. In the Babylonian mission Lost, you start on an island with several archers and a priest. You have to go to the north of the island, use the archers to kill all but one archer on a second island, use the priest to convert a priest on the other island, immediately use that priest to convert the remaining archer that opens fire the moment the priest is converted, hope the priest can convert the archer before the archer kills him, ''then use the archer to attack a transport at the northern end of the second island to send it towards the first so the two priests can work together to convert it!'' I don't seem to recall ''that'' little bit ever making it into the history textbooks...
** Or, just use your own priest to directly convert the Transport Ship. It might only work on the expansion, though.
* DarkReign has several:
** In mission 5, as the Imperium, you have to destroy a Freedom Guard base while preventing them from destroying the Water Extraction Compound, located in their base. They attack it when you breach their defenses, so you have to be ready to charge in and destroy everything quickly. However, you have no way of knowing what they've got in the way of units, so you have to pray they don't have half an army ready to destroy it.
** In mission 8, once again as the Imperium, you have to flee your base, which is hopelessly overrun, and take a MacGuffin to an extraction point to receive reinforcements. However, the only way to do this is to hide out on the lake west of the base, wait for the Freedom Guard to finish destroying the base and leave, then move back through the wreckage. However, if the Freedom Guard army catches a glimpse of the transport or any other units heading out onto the lake, the army won't leave the area. Considering the MacGuffin is both sluggish and armored with tinfoil, it's almost impossible to get through. And god help you if you run into a marauding Spider Bike.
** In the final level, the Tograns' survival is dependent entirely on what the Imperium does. If they attack your base too early, you'll be obliterated. If they attack the Freedom Guard too aggressively, they'll punch through and destroy the Orbital Defense Matrix, which is the only thing preventing the activation of an Imperium KillSat (read: NonStandardGameOver). If they don't attack the Freedom Guard ''enough'', the Guard will attack you. And if the Guard and Imperium attack ''[[CurbStompBattle at the same time]]''...
* ''AtomZombieSmasher'' is a grand example of this. The game randomly places zombie infestations, spawn points, and even what mercenaries at at your disposal during a given battle. The game could be over before the it even started.
* In ''PyramidRising'' every level has a goal called "gold time" that gives your city some new building or enhancement. In some levels, meeting this goal is only possible if the correct purchases show up at the right times at the port.
* In the primitive strategy game ''Bokosuka Wars'', combat wins and losses are based on what is essentially a dice roll.
[[/folder]]

[[folder:Rhythm Game]]
* ''PumpItUp'' [=NX2=] and [=NXA=] have a World Max mission with the song Deja Vu. At specific parts of the song, the chart can change into one of multiple patterns. Unlike most instances of this trope, this chart is actually a popular one.
* In ''GuitarHero 3: Legends of Rock'', there are a few segments called "Guitar Battle" in which you face off against a computer (or player) opponent and play for power-ups to use on one another. These power-ups, ideally, are used to make the other person fail the song or at least prevent them from obtaining power-ups of their own. The luck-based success is against the final boss on the Expert difficulty - if one is lucky enough to both have a non-fatal power-up used against them at first and then acquire a 'whammy attack' power-up of their own, the boss can be promptly defeated much, ''much'' more easily than via any other power-up combination.
* ''VideoGame/{{DanceDanceRevolution}}'':
** ''[=DanceDanceRevolution SuperNOVA=]''[='=]s Stellar Master mission mode often has mission requirements that are entirely luck-based--i.e., playing multiple songs in a row with a (randomly-selected) onscreen character of the same gender.
** The end of the song "Tohoku EVOLVED" has a jump that comes at the end of the song, preceded by a sudden spike in scroll BPM to 1020, and is always randomized to be one of four "corner" jumps[[note]]L+U, U+R, R+D, or D+L[[/note]]. Because the chart is scrolling so fast, hitting it boils down to predicting the correct jump. For those who played the song as an Encore Extra Stage in ''[=DanceDanceRevolution X3=]'', with a [[OneHitPointWonder one-point lifebar]], this means that no matter how well one played up to this point, you had a 75% chance of failing the song.
* ''{{Sound Shapes}}'' has Death Mode, in which you must collect notes spawned one by one randomly over a map, within a ludicrously tight time limit, to go along with the instant-death enemies, projectiles and inability to touch most surfaces. One attempt can see three or four notes spawn right next to one another, others having notes appear on the other side of the map. Even a perfect run of certain spawning patterns cannot possibly be done within the timer.
* The whole point of the Vegas character in ''VideoGame/{{Audiosurf}}'', whose powers are the ability to shuffle the board and generate random powerups.
[[/folder]]

[[folder:Roguelike]]
* ''[[VideoGame/AncientDomainsOfMystery ADOM]]'' has a number of subquests that are uncompletable if the RNG decides it doesn't like you. For example, the dwarven elder asks you to kill a random creature, which may be disgustingly rare or far more powerful than you can handle until much later in the game - this locks out most of the rest of his quests as well. The road to the [[MultipleEndings Ultra Endings]] and the [[InfinityPlusOneSword Trident of the Red Rooster]] is especially infuriating: Gaab'Baay wants a boar skull which first requires a rare wilderness encounter with a boar and then a [[RandomlyDrops random corpse drop]], then she wants a scroll of danger which is also quite rare, and [[spoiler:Khelevaster needs an Amulet of Life Saving]].
* DwarfFortress, on the whole, is a strange fusion of luck and skill, with luck most noticeably determining just how stupid your dwarves will act (EG: dodging by leaping off a cliff). However, the truly luck-based missions enter when either noblemen make demands or someone has a strange mood; will you be lucky enough to have the requisite materials on hand? Will you be lucky enough for them to ''exist within the world''? It is quite possible to generate a world with next-to-no iron in it and have someone demand steel furnishings. And if none of your neighbours have iron, you can forget about trading for it...
* While most {{roguelike}}s (like say ''{{Nethack}}'') have a fair bit of luck involved in winning, ''VideoGame/DungeonCrawl'' takes this to the extreme in the early portions of the game. All classes start out woefully under-equipped (mages don't even carry a backup weapon) for a long expedition, and worse, survival early on relies heavily on two things: being lucky enough to find some special equipment (finding something like a dagger of venom can help immensely), and being lucky enough not to encounter any of the many unique enemies you can encounter from level 2 of the dungeon onward (it would not be unusual to see Sigmund as well as another unique enemy on the same level). Once you've levelled up a bit and built up equipment, it gets a bit more manageable, but the early game can be outright unwinnable if it decides to screw you over because of how limited your options for escape are.
* VideoGame/FTLFasterThanLight:
** Don't come across any weapons during your playthrough? It's possible and it make the end boss nearly unwinnable.
** It's also possible to come across a fleeing ship and fail to hit its before it escapes, resulting in accelerated [[AdvancingWallOfDoom Rebel advancement]].
** The Crystal Cruiser is absolutely notorious for this. It requires you to find an event that is exclusive to certain sectors, followed by another event that is also exclusive to certain sectors, then finding a specific sector so you can jump to the hidden sector to unlock the ship. This is because the unlock is considered a colossal GameBreaker.
* The toughest dungeons in the ''VideoGame/PokemonMysteryDungeon'' series qualify. They allow only a single party member, reduce your level to 1 (Or 5 in Gates To Infinity), prevent you from bringing money or items, and deny the use of IQ/Team skills. Your success thus tends to be heavily dependent on whether or not you're able to locate the right items to help you stay alive, plus you also need to worry about the ever present threat of traps and monster houses, which can occasionally appear in positions that make it completely impossible avoid them if you want to reach the next floor.
[[/folder]]

[[folder:Role Playing Game]]
* Certain {{Role Playing Game}}s have aspects of the Luck-Based Mission to them, particularly in battles with powerful enemies. If an enemy uses an especially powerful attack twice in a row (which is sometimes rare, sometimes distressingly frequent -- Luck), it could mean the death of your party, regardless of how strong you are at the time. Sometimes random damage can also affect the gameplay when fighting against tough enemies.
** ''VideoGame/FinalFantasyI'' had Necromancers, ''VideoGame/FinalFantasyII'' Cockatrices. If a group of them got to strike you first (which is completely random), and you didn't equip an item to protect your party from debuffs (which you usually get late in the game, short of SequenceBreaking) ...Poof! The whole party gets [[OneHitKill killed]] or turned to stone (which is pretty much the same) without even getting the chance to fight back or attempt to escape.
*** There's also Echidna, in the Dawn of Souls and Anniversary edition of Final Fantasy 1, whose earthquake spell can inflict instant death on your entire party, even with protection against instant death.
** The ''VideoGame/DragonQuest'' series takes this idea to a new level, especially in ''VideoGame/DragonQuestVIII''. Pretty much ''every'' attack every random encounter has is remarkably powerful. On the other hand, almost all of them (even the most badass bosses) have certain moves in their repertoire that more or less boil down to staring off into space and wasting a turn. The fact that they're stupidly powerful when they hit you with their best shot but sometimes don't hit you with any shot at all is supposed to balance out in the end, but of course, this is random....
*** And if you should want to resurrect someone who just died, good luck: Even most resurrection spells have a random chance of failing.
*** Even navigating a map or a dungeon without losing much HP is a chore per se. [[EncounterRepellant Encounter Repellants]] like Holy Water or certain abilities are highly unreliable, monsters always have a chance of doing the first attack and devastate you before you can act, and what's worse, failing to run away (which is entirely luck-based, and harder to do against stronger monsters, which '''are''' the ones you want to run away from) gives the whole enemy party a free turn, leaving your party in an worse shape that's even less likely to win a battle, forcing you to keep trying to run away until you either succeed or die.And because of the above-mentioned flaw in resurrecting spells, your healers will burn through their MP like nothing after few such encounters, barring succeeding at every resurrection at the first or second attempt.
*** Success in reaching the Dragonlord in ''VideoGame/DragonQuestI'' is almost entirely decided by how often you run away successfully and how many enemies put you to sleep. If you're downright unlucky, a monster can put you to sleep with his first turn and then wail on you until you die. Even if you survive the gauntlet of downright unfair enemies on the way down the floors of the Dragonlord's castle, you still need enough MP left over to kill him too. Also, his first form can silence your healing spells, though it is possible to run away from him and re-engage him with your spells enabled again. Yes, you can actually run away from the ''final boss'' in this game, but it's just as luck-based as anything else.
*** ''VideoGame/DragonQuestII'' had an enemy spell called Sacrifice, which is an instant party wipe that never misses. If a random encounter knows this spell (although very few do), and it goes first, you are completely fucked. Have fun redoing the entire Road to Rhone.
*** ''VideoGame/DragonQuestVIII'' also features a very annoying random encounter enemy that has Death Dance, a move that can kill 3 members of your party in one turn, if you're unlucky, leaving you prey for a quick party wipe even if normally you'd be at no risk.
*** You think 8 is bad? Try ''VideoGame/DragonQuestIX''. Oh, the main game doesn't invoke this trope. And neither does most of the post game. But high level Legacy bosses get 3 turns. Even with a maxed out party if they attack the same person twice or critically hit them once they will die. One character can use an item that will protect against the latter, but the other three have no recourse except to rely on an evade rate that caps around 20-25%. Most of them also have an [=AoE=] move that will do about 300-350 to you. Your max HP is in the 810-900 range if you don't farm 1/256 drops repeatedly and 999 if you do. Either way if they do that move three times in a round, instant Game Over. They also have the dreaded Disruptive Wave. However there is another side to them being luck based fights. The easier Legacy bosses can be soloed with sufficient farming, provided they don't Disruptive Wave too often.
**** Beyond battles, IX has MANY quests that are completely luck based. You simply have to wait for an item to drop. Sometimes it'll happen the first battle...sometimes it'll take forever. "Kill 3 [[MetalSlime Metal Medleys]] with a certain Spear skill that only has about 10% chance of working"?"Kill a certain DemonicSpider with a CriticalHit, and skills that give you an automatic crit don't count"?"Kill certain monsters with the elements they're most resistant to"?
*** And really, the series as a whole has LEVELING a part of this. For the most part you will not gain any reasonable experience outside of finding metal slimes and their ilk...which are both very rare and LOVE to run away.
** The third ''Monster Girl Quest'' installment, the first half in particular, is largely based on luck. You have to rely on the techniques ''Fallen Angel Dance'' and ''Serene Mind'' to block/dodge some of the attacks of foes which would otherwise [[CurbStompBattle curb-stomp you]]. Since luck plays a huge part in how often these techiques protect you, battles can range from complete cake-walks to NintendoHard to actually impossible depending on how many times the RandomNumberGod decides to let you dodge attacks.
* ''VideoGame/BlackSigil'' has the main quest being the removal of a curse on the main character, which in gameplay terms results on him getting random status ailments at the beginning of battles. It's not much of an issue as you'll usually have two more party members to back him up, but if you get Cripple, Slow or Blind during one of the more difficult battles, or worse the DuelBoss, you'll enjoy restarting from the last save point.
** The Physica Absorbus spell can turn any simple fight into a hair-tearing game of chance. Contrarily to how drain attacks usually behave, it heals the user for ''eight times'' the damage caused, meaning even a weak hit can completely heal the monster who used it. Throw in the fact that all monsters have a decent chance of countering any hit with a random spell, and a whim of the RandomNumberGod can turn any damage you cause into a free shot at you and healing back all the damage you caused, and then some.
* ''BreathOfFire2'' has the fight with Habaruku. Depending on which spells the random AI picks, he'll either completely waste you in two turns, or not hurt you at all.
** Also, in Highfort, you only have one character in your party and have to deal with random encounters with enemies who have an instant death spell in their repertoire. Your character isn't a powerhouse so you can always count on an enemy launching an attack. Just hope it isn't a Death spell.
** A certain fishing spot can only be accessed if you travel from one point to another without running into a random battle. As they are random, and often frequent in that area, this is a luck-based sidequest. You can skip random encounters using the game's flight power, but that's gained several chapters after the sidequest is first available, and can be LostForever well before the end of the game.
* ''VideoGame/FinalFantasyMysticQuest'''s first fight (which also begins the game) pits Benjamin against a Behemoth. Both characters can only attack, and their attacks naturally have a chance of missing. If you miss more often than you hit, or if the Behemoth lands lots of criticals, you're selecting "Try Again", no questions.
** Any battle featuring enemies with petrification or instant death attacks, which become more frequent later in the game, can be this. Many times they can spam these moves and wipe out both party members before you have a chance to get back on your feet. Good thing DeathIsASlapOnTheWrist in this game.
* ''VideoGame/FinalFantasyVI'''s Auction House. There are 2 magicite items you can get there to learn some nice spells, but they have pretty low odds of showing up (3/16 chance for the first and 1/8 for the second), and the auction takes quite a while to finish each time it's the wrong item.
* The likelihood of succeeding at the chocobo racing mini-game in ''VideoGame/FinalFantasyX'' is highly dependent on the number and locations of the balloons and hazards, which can vary widely and appear to be randomized.
** Most notably, in the first turn. If a bird nails you there, you're done.
* In ''VideoGame/PokemonGoldAndSilver'', tracking down the Legendary Beasts (Raikou, Entei, Suicune) is largely luck-based. Spending hours chasing these three Pokémon around by looking at the map to see where they are, moving to another area, checking the map, moving to another area...repeat ad nauseum. It never worked, either. Thankfully avoided for Suicune in Crystal version (and in the remakes, Heart Gold and Soul Silver), but Latias and Latios take up their mantle in ''VideoGame/PokemonRubyAndSapphire'' and ''Emerald'', and the aforementioned remakes; Mesprit and Cresselia go walkabout in ''VideoGame/PokemonDiamondAndPearl'' and ''Platinum''; and the first-generation Legendary Birds (Articuno, Zapdos, and Moltres) do this in Platinum.
** Made even worse by having to run into each one of them at least once before you can track them your map. That's right, you need to be lucky enough to run into one of them by chance, before you can start actually hunting them.
*** At least in Gen 4 (including the remade versions of Gen 2), the map on the Pokétch/Pokégear has a tracking feature on it, so you don't have to worry about the luck aspect of the initial finding anymore. Gen 5 was also kind enough to have its roamers come with storms that track on the electric signs in the gatehouses (and, better yet, you only have to worry about ''one'' in ''Black'' or ''White'', and ''none at all'' in ''Black 2'' or ''White 2'').
** While we're at it, catching pretty much any legendary. Sure, you can give it status effects, whittle its health down to a sliver, etc., but ultimately it boils down to "Will the game decide that I've caught the legendary before I run out of Ultra Balls?" (it helps that the catch rate is subject to [[http://bulbapedia.bulbagarden.net/wiki/Catch_rate a lot of variants]]; [[http://veekun.com/dex/gadgets/pokeballs calculating them is possible]], but not guaranteed to suceed). Even in the optimal situation for catching one, most have a success rate of about 18%. And even if you do not run out of balls, the Pokemon you are trying to catch will eventually run out of PP and knock itself out with Struggle if you don't manage to catch it in time.
*** Beldum may possibly be even worse to catch than the [[OlympusMons Legendaries]], at least in Platinum. As if the incredibly low catch rate AND [[CastFromHitPoints Take Down]] weren't bad enough, you have to wait for a swarm of them to appear, which could take days, possibly even weeks, so you'd have to be patient to even get the opportunity to confront one. This also means that if you miss out on the swarm day, or simply fail to catch one in time, you're boned and have to wait ''again''. Then they only appear on the route that causes constant sandstorm damage to most of your pokemon. ''And'' Beldum's only attack inflicts damage on itself, so you could do everything right and it could still kill itself.
** And on the topic of Pokémon, Battle Revolution has a few luck-based coliseums. In the first, you have a roulette wheel to determine whether you get to use one of your own Pokemon, or one of your opponent's far less useful ones. In the second, it's a 100-battle endurance match, where the roulette is used to determine if any of your Pokemon get healed. The roulette can actually be controlled with good timing, though, since it decelerates at a fixed rate rather than randomly, but learning the timing will require a few spins of it.
*** Not to mention that the 100 battle match has fog on most of its stages, which makes all pokemon's accuracy drop. Sure it's totally ''fair'', as it affects both sides equally, but over 100 battles, the probability approaches 100% that you will eventually be horribly screwed while the computer is unaffected. Remember that you need to win 100 battles with no losses, while the computer can lose 99 battles and still beat you at the 100th.
** Catching Feebas is this in Generation III and especially IV. In both generations, Feebas can only be found in one area in the game. In Gen III, they appear in a river that consists of hundred tiles in total and Feebas only appears in six of them. ''SIX''. Thought that was bad? In Gen IV, they only appear in a lake and only in four tiles, ''which are randomized every day''. Want to catch a Feebas? You either need a lot of patience... or a lot of luck.
** The Honey Trees on Gen IV. If you're lucky, you'll be able to catch Pokémon like Aipom, Heracross and Cherubi that can't be found anywhere else. If you're not lucky, you'll get Wurmples. On every single tree. Adding to the luck factor is that it takes six hours for a pokémon to appear and save scumming doesn't work, as the pokémon you will encounter is determined the moment you slather the tree. At least the level and gender ''are'' randomized before an encounter, though, making it a little bit easier, yet still frustrating, to catch that elusive female Combee.
*** As an added batch of fun, Munchlax is found on precisely four trees, which require the use of a calculator and knowledge of a value found only by hacking shiny Pokémon to determine which of about a dozen are those trees. It's still a 1% chance once you know which trees it is.
** ''Platinum'' also has the "5 {{M|eido}}aid Knockout Exact-Turn Attack Challenge" in the (Sinnoh) Pokémon Mansion. You have to beat five trainers in a row (itself pretty easy since they're all using one Clefairy each at level 25-33), but in an exact number of turns. The "luck-based" part comes from the fact that the total number is usually only one or two more turns, and ''every single Clefairy knows Endure'', so not only do you have to be able to knock them out, you have to hope they don't use Endure at the wrong time or it becomes completely impossible (and the little bit of control you can get is with Taunt, which can only work for the last match). Just to rub salt in the wound, what's actually worth taking this challenge for is the chance to fight one of two trainers holding a RareCandy (thus this is one of the only ways that item can be farmed) that you need Thief or Trick to get and have to use before the enemy destroys the item by using Fling. And you only get to take this challenge once a day. [[SaveScumming Hello, soft reset!]]
** In Contests in 4th Gen there is no way, repeat ''no'' way to beat the Master Rank unless you're incredibly lucky.
*** This is merely an improvement from the 3rd Gen Contests, which were comparably worse due to jamming moves.
** A good chunk of the dungeons in the VideoGame/PokemonMysteryDungeon games qualify as well. Purity Forest and Zero Isle South, for example. Not only did they have 99 floors, but you could not take any items, money or teammates with you, you could not recruit anything inside, your level was reduced to one and you were forced to save before going in, meaning that essentially whether you made it through or not depended on how quickly you could locate the stairs and what items you could find.
** The Battle Pike of the Battle Frontier. No wonder your reward for completing it is the Luck Symbol...
** A few rare trainers love using evasion-increasing moves like Double Team, which are actually banned in competitive play for being too luck-based. The worst offender is probably Janine in ''VideoGame/PokemonStadium 2'', whose entire strategy revolves around using Baton Pass with several layers of Double Team. And every one of her Baton Pass targets have either Swagger or Confuse Ray, dropping your percent chance of landing a hit to the single digits while she slowly tortures you to death with Toxic and blocking your escape with Spikes and Mean Look. Either you come fully prepared with a team that packs Haze and Heal Bell, or prepare for a ridiculously long fight.
** The first Stadium game wasn't above using luck-based challenges either. The fourth battle in the final round of the Prime Cup throws the Gambler at you, who has possibly the most aggravating strategy of all the opponents you'll face; paralyze your Pokemon with either Body Slam or Thunder Wave so his mons outspeed yours, then spam one-hit KO moves nonstop. What makes this even worse is that his team is actually of varying types of Pokemon who are all pretty durable, and he's actually smart enough to switch them out when faced with a bad matchup. You could either sweep him effortlessly or get completely annihilated; it's all up to luck. And considering how Pokemon Stadium is with giving your opponents fantastic luck....
** [[TwoWordsObviousTrope Two words: Safari Zone.]] It's pretty much either catch the Pokémon instantly with the crappy Safari Ball(Which you'll eventually swear is just a normal Pokéball painted over), or watch that Chansey with a 1% chance of appearing ([[MeaningfulName Hence the Japanese name Lucky]]) run for the hills. Your only aid in helping with this? Pebbles/Mud that [[BlatantLies really helps raise the catch rate]] and make it easier for the Pokémon to run away or Bait that makes it harder to catch the Pokémon, but lowers the likelihood of the Pokémon running away. Naturally, this is in every game before Gen V.
** In ''[[VideoGame/PokemonXDGaleOfDarkness Pokémon XD]]'', there is the "Metronome Cup." You fight two Pokémon with two of your own. All of the Pokémon have only one move - Metronome, a move that summons any other move at random. Winning or losing is literally and entirely based on luck. There is no strategy involved in the least. [[HilarityEnsues It's rather fun, however]].
** Voltorb Flip in the Heart Gold/Soul Silver games is basically Minesweeper with much more random guessing. The higher levels especially so.
*** The game Voltorb Flip is otherwise quite deep. But some boards are really unsolvable, like ones with something close to "Sum 5/Voltorb 2" on every row and column. Boards like those always require 2 to 4 guesses, which translates to a 1/4 to 1/16 chance of winning, given perfect play. And there's always the chance of landing on a Voltorb on the first turn, even when the row says 7/1 and the column says 8/1 ... And a first turn Voltorb means back to Lvl 1.
*** They have online calculators for Voltorb Flip. However, every one of them has a disclaimer that basically amounts to "Voltorb Flip is a Luck Based Mission. This calculator can only give you a reasonable idea of which tiles are safe."
*** Like RealLife Casinos, Game Corners in general are a Luck Based Mission. Compared to the outrageously rigged slots in the other generations, Voltorb Flip is downright forgiving. Some actually preferred the luck-based slots, though, since it was much faster-paced and you could just buy casino coins if you were rich and impatient.
** How about the Battle Frontier? You have to win 49/100/170 consecutive times without losing once, and without any continues (and you can't save and reset, you get disqualified). And the game can be brutal about luck sometimes. Say, you meet an opponent with Brightpowder (held item that increases evasion), and has a one-hit KO move, which hits 30% of the time. It's extremely common in the Frontier that both Brightpowder and the one-hit KO move takes effect. Sometimes 3 times in a row, and the matches are 3 vs 3. Say goodbye to your hours of winning. Oh, and the game does mock you if you lose, as if you played bad.
*** The Battle Factory is the worst, because you don't even get to play with your own team, instead, you are given random Pokémon to fight, and it resets every 7 matches (there are 49 matches to be won). So unless you get strong Pokémon in all 7 sets, you are screwed.
** ''Stadium 2'''s Challenge Mode is probably the worst offender. The game is already [[TheComputerIsACheatingBastard heavily rigged in the computer's favor in every match]], but Challenge Mode makes it worse by forcing you to use 6 randomly generated Pokémon that are almost guaranteed to be complete crap, and then use them to fight the (much better) random Pokémon the computer gets in 4 difficulty levels. The description of the mode says "This mode tests your ability as a trainer", but it would be more accurately described as "This mode tests your ability to resist carpal tunnel syndrome from how many times you'll have to reload the game upon getting a terrible team".
** The Vermilion City Gym could also count. In order to deactivate the electric gates blocking your path to Lt. Surge, you need to flip a pair of switches. Said switches are randomly located in two of the 15 trash cans in the room, but they would always be next to each other; if you pick the wrong can after hitting the first switch, they would reset. The problem with this is that guessing incorrectly would, for whatever reason, ''change which trash cans the switches were in''. You could spend hours trying to get to Surge, since the absolute "best" you can do is a 50/50 chance of finding the second switch.
*** Technically, there are 3 trash cans which are surrounded by 4 trash cans, giving 1 in 4. 8 which are surrounded by 3 other, giving 1 in 3 And 4 with 2 surrounding, ie. 1 in 2. That would give a total of (54/15)/12*100%=(3.6/0.12)%=30%; yes, about 30% of success.
** The very battle system itself is luck based to an extent. You can plan and strategize as much as you possibly can, but if the game decides it doesn't want a move/item/ability/side effect with a less than 100% chance of working to succeed, there's absolutely nothing you can do about it. Then there are critical hits, which are possible for almost every move but are also almost always random. Some moves choose targets at random in double and triple battles and others (and a hold item) force the opponent's to switch out at random. Even damage itself has a random variance range rather than being entirely fixed by stats. There are still some other luck based factors not yet mentioned here.
** The Dream World from VideoGame/PokemonBlackAndWhite was intended as a successor to [[VideoGame/PokemonGoldAndSilver Heart Gold and Soul Silver's]] Pokewalker in that it's an alternative means to obtain Pokémon and items for your game. While it does do that, it prefers to send players to random locations rather than letting the player pick the location to explore for themselves. Add the fact that you can only take ten steps each visit before leaving and that Pokémon will stop coming to you after so many visits in a day, [[ScrappyMechanic and it can be pretty aggravating]].
** So can trying to get certain rare Pokemon from Hidden Hollows in the sequels. Half the time it's an item you find, or a Pokemon you have/don't want.
** Breeding in any game, if you aren't an [=RNGer.=] Getting one aspect isn't too hard. You can control inherited moves easily as long as your breeders don't level up too much in the daycare (before Gen VI) and getting the right nature is easy with one parent holding an Everstone, and with only one or two abilities, it isn't hard getting the right one, but getting all at once can be aggravating.. And good stat parents help your IV chances but do not guarantee good stat offspring. Even worse is trying for shiny Pokémon. The Masuda method of using one parent from a foreign language game helps, as does Gen V's and VI's Shiny Charm, but the chance is still low. Arceus help you if you're breeding for shiny, good stats and correct nature all at once.
** [[VideoGame/PokemonXAndY Gen VI]] introduces Wonder Trade. You offer one Pokémon, and you get a random Pokémon in return. You won't know what you get until it comes. It could be anything from a [[OlympusMons legendary]] to a starter to a ComMon to anything in between.
*** It also brings back the exact-turn battle challenges from ''Platinum ''in the form of restaurants, although going a couple turns above or below the par will merely give you a smaller prize, giving you some leeway. The higher-level restaurants, though, will actively try to screw you up by throwing everything they can into defense. And the last one squares the whole luck factor by engaging you in rotating battles, in which the Pokémon you target is completely random. Fail too many guesses and you're guaranteed to get a dent in your wallet.
* ''VideoGame/FinalFantasyXII'' seems to be entirely made of randomness. Most of the best equipment is based on [[RandomlyDrops enemy loot]], which drops very VERY randomly. The chests that are the backbone of exploration? They appear randomly, and contain random contents. The high-powered rare enemies for completionists? Go figure, most of them ''also'' appear randomly. It would be one thing if you had somewhat of a chance, but many of these "random" chances can range from 10% all the way down to ''0.1%''.
** And then there's pulling off the most powerful Concurrence in the game, which is required to earn a specific achievement and complete The Sky Pirate's Den, which is required to earn the highest clan rank. Successfully pulling this move off depends on 98% luck and 2% twitch reflexes. The reward for earning the highest clan rank? A BraggingRightsReward.
* In ''VideoGame/FinalFantasyXIII'', if the leader you're controlling gets KO'd [[WeCannotGoOnWithoutYou you lose]]. This means some boss battles and even random encounters boil down to praying to god that they don't all decide to gang up on your leader, because even some of the Mooks will do enough damage to kill a character in one round if they concentrate their attacks.
** Not to mention enemies that use attacks with an instant death property. Fortunately, most of those attacks have a piddling 1% chance of success, so it's not too bad...until you get to the first form of the final boss, who uses an attack with a ''50%'' chance of success, meaning that even with Death-resistance accessories there's still an ever-present chance that it will instantly cause a Game Over wthout you being able to do anything about it.
* Pretty much all the optional boss battles in the PS2 ''Franchise/ShinMegamiTensei'' games (''VideoGame/DigitalDevilSaga'', ''VideoGame/{{Persona 3}}'', and ''[[VideoGame/ShinMegamiTenseiIIINocturne Nocturne]]''). ''Devil Summoner: [[RaidouKuzunohaVsTheSoullessArmy Raidou]] [[RaidouKuzunohaVsKingAbaddon Kuzunoha]]'' is exempt from this, as its optional fights are much more forgiving. Largely because DS isn't NintendoHard.
** In ''Nocturne'', sometimes you're going through an area you're +10 levels over, and you'll get ambushed. The enemy then uses your weaknesses for extra rounds, gets a few lucky crits on the hero and BAM! Game Over. And you didn't even get a chance to counter attack.
*** Furthermore, if merely the main character dies, it's Game Over. There's two different elements full of nothing ''but'' instant kill spells that work startlingly well, and if you want to resist or null one of them, you become weak to the other, until really rather late to the game where you start getting better Magatama. Naturally, a large number of random encounters pack at least one of the two instant kill elements, making most random encounters with them a Luck Based Mission.
** Be happy, because ''VideoGame/{{Persona}}''[='=]s Thanatos Tower is a luck based dungeon.
** ''VideoGame/{{Persona 3}}''[='=]s PSP version has Maniac Mode. The enemies hit twice as hard, the AI is better, and the enemies are much more likely to get the advantage if a battle starts with neither side ambushing the other. This is bad, because an ambushed party, no matter what level, always has a chance of being taken out once you've gone about halfway through the game's one dungeon. Made even worse by the fact that only the player character has to be killed for a game over, and the enemies will often gang up and expose weaknesses. Making it even worse is that in order to save you have to stop what you're doing and exit the dungeon, only able to re-start at select pit-stop floors that are spaced ever 15-20 floors apart. So if you're unlucky enough to get ambushed on any floor above 70, chances are you're about to lose 1-2 hours of gameplay.
** ''VideoGame/{{Persona 4}}'' features a luck-based mission that requires playing the fishing mini-game until you catch a big fish, and then trading that in so you can try and catch an ''even bigger fish''. This mission must be finished if you want to max the Hermit Social Link.
** ''VideoGame/ShinMegamiTenseiStrangeJourney'' has a luck-based '''FinalBoss''' at the end of the Neutral path. Its second form has an attack that is a guaranteed instant kill against whoever it hits, with no way to protect against it. Yes, it can target you. This essentially means every time the boss casts it, you have a 1 in 4 chance (AT BEST) of dying. ''Even if you're at level 99.''
** While the game is overall more forgiving than past SMT games, Demon Negotiations in ''VideoGame/ShinMegamiTenseiIV'' are almost entirely luck-based as the Demons give no indication as to what the correct response is, and even if you do everything correct they may choose to leave with your items anyway. Additionally, enemy reinforcements can show up after any battle, and may automatically have priority. Given the game's RocketTagGameplay, this can be a very, very bad thing.
* [[ThatOneSidequest Mushroom #VIII]] in ''VideoGame/KingdomHeartsII Final Mix+.'' True, this is only a sidequest required for OneHundredPercentCompletion, but then again, the type of people who play the Final Mixes ''are'' completionists. Anyways, this sidequest, no matter what strategy you use, requires a complicated setup and can be resource-intensive--so you ''will'' be SaveScumming. The point is to keep the mushroom in the air by hitting it and never allowing it to touch the ground; what makes it luck-based is the completely random direction the mushroom will jet off to every few rounds of hits. It requires as well very fine-tuned timing and hand-eye coordination, yet if luck is not with you, you will lose. Oh, and how many times must the mushroom be hit? ''Eighty-five times, minimum.''
** Some of the bosses in ''BirthBySleep'' also qualify, most notably the [[BonusBoss Mysterious Figure and Vanitas' Lingering Spirit.]] To specify, neither boss has any sort of recognizable pattern to their attacks; their actions are determined almost entirely by an RNG, so MF may just spam his X-Beam attack, in which case he's not very challenging, or he may randomly decide to create clones of himself, fire lazers from all directions, turn invisible, and use his "[[FanNickname rape]]-[[GameBreaker rope]]", all at the same time, in which case you might as well put your PSP down. Another factor that comes into play is that both of these bosses have a random chance to avoid all damage. VLS will teleport away from an attack before it connects and counter, while MF takes it a step further, actually ''turning back time'' to before he was hit and attacking the player before they launch their attack. Whereas most action games (including the other ''KingdomHearts'' games) will give enemies a threshold of damage that they can take before they break out of the player's combo, these guys simply have a random percent chance to avoid all damage, every single time they're struck, and even if the player catches them while they would otherwise be vulnerable, meaning that the player's actual ability to deal damage (and thus defeat the boss) is determined entirely by chance.
* A hint that the ''VideoGame/{{Wizardry}}'' series of RPG's are luck-based can be found in the "terminate game" battle order in ''Wizardry VII''. Taking a step-equivalent (a single step, turning around, etc) has a percentage chance of triggering a fight-so you could theoretically finish off one group of enemies, turn ninety degrees to the left, and get attacked again. Then, once an encounter started, the computer picks from a list of different enemies for that area-each has a given percentage chance to show up. Then each enemy type has percentage chances to determine how many appear, and how many other groups are with them. So a given fight could consist of two hostile birds, or two groups of five hostile birds with a squad of bugs to help. And then, your spells' chances of working, the chance an enemy will cast a spell (and then, what kind of spell they cast), the chance of any given attack being used when they physically attack, and the chance of any given attack poisoning, paralyzing, or instantly killing a character... you guessed it. All determined by the random number generator.
** Simply put, to play the later games, you ''had'' to save, and you had to get used to the save game and Quit/No Save commands. Watching the party die because a should-have-worked spell didn't, the enemy instant-killed two party members, or you got a full screen of the nastiest enemies in the game generally falls under the heading of "shit happens".
* The BonusBoss Ozma in ''VideoGame/FinalFantasyIX'' can just as easily wipe out a level 99 party as he can be beaten by a level 1 party; winning or losing depends entirely on what attacks Ozma decides to use.
* ''VideoGame/FinalFantasyX2'' features the Sphere Break mini-game, necessary for acquiring the Lady Luck Dress Sphere. Aside from other issues, it is entirely impossible to progress when your core number comes up 1. (The objective of the game is to combine one of your four base numbers with one or more of the twelve other numbers on the board to create a multiple of the core number, with points being awarded for using more of the other numbers at a time; since each of your four base numbers is already a multiple of 1, the round is over before you get to use any of your scoring tiles.) If this happens even one round, out of the twenty rounds you have to win the only important match, it can ruin your combo bonus and make winning impossible, and [[TheComputerIsACheatingBastard the closer you came to winning, the greater the odds that the computer would start doing this]].
* Ooh, boy, ''VideoGame/FinalFantasyIV''. Where to start? Rydia's additional summons (Bomb, Cockatrice, Mindflayer, and Goblin), the Pink Puff Tail that gets you the best armor (that one even more so because the enemies that drop it only appear in ''one room in the entire game.''), and in the DS version, the additional tails and the Rainbow Pudding. The Rainbow Pudding is particularly irksome, because it's the only way to complete the DS-exclusive Namingway sidequest. Speaking of the DS version, the BonusBoss, Geryon, and the other BonusBoss, Proto-Babil. General strategy for those two bosses are: Equip the Adamant Armor on all characters (not an easy feat itself, because of the aforementioned Pink Puff Tail), and '''pray.'''
* In the DS game ''MasterOfTheMonsterLair'' (that's ''Dungeon Maker'' outside the US) the boss of the 5th floor is an Iron Golem who takes 1 damage from nearly all attacks. The only way to deal significant damage to him is to hope that your sword randomly triggers its one-hit KO attack. And even then, it only deals 100 of the 300-or-so HP the boss has, so you have to get really lucky 3 times before the boss's strong attacks kill you.
* Look The Other Way, a luck-based minigame found in the MinigameZone of VideoGame/SuperMarioRPG, gives you exactly a 50/50 chance of winning, and the prize is randomly chosen and nearly always junk. However, you have a very small chance of winning powerful items like the party-healing Kerokerocolas, invincibility-granting Red Essences, and the game's real prize, the Star Egg, which deals 100 damage to all enemies and can be used unlimited times for no cost (fortunately, the Egg itself is always given out with the 100th win, so getting it is only as random as winning 100 times is). Playing the minigame is fortunately free, but expect to spend a very long time playing it if you want to nab that Egg.
* In ''VideoGame/TheWorldEndsWithYou'', on the 5th day of The Game, a Reaper asks you to bring him a 'Supply Factor' pin to access a particular store. Even on Hard, with your level set low enough to let you fight the Noise that drop these pins, it is dependent on a) Letting the Noise spawn in-battle, and b) rolling a low chance of these pins dropping.
* In one mission of ''ValkyrieProfileCovenantOfThePlume'', the player has to save a girl from monsters. While there are abilities that can draw the attacks away from her, sometimes the monsters will all decide to [[TheComputerIsACheatingBastard ignore the taunts]], gang up and kill her in one turn anyway--meaning you have to pray that she can dodge the attacks.
* ''IcewindDale 2'' proper was somewhat about this, featuring some bosses who use "x% chance your party all dies" spells, but the tactics mod is absolutely brutal. The dragon in the snake/amazon level is immune to all hold spells (as in, anything that would render him immobile), all death spells, it has 300 hp, resistance to every type of damage. Oh, and he has 99 damage attacks 4 times a round while every so often hitting your party with ~100 damage [=AoE=] acid attacks. Mind you this is when your party's tank has a grand total of, at maximum, 250 hitpoints. The only way to beat him is to hope your pre-placed delayed blast fireballs and skull traps take out enough of his hitpoints to let your tank take him out in 2-3 rounds or else its all over. Did I mention his attacks also stun and he constantly casts fear? The myriad ways you can be fucked over beyond recovery each round with a single throw of the dice make it the pinnacle of luck-based mission.
** BaldursGate and BaldursGate2 had this problem with enemies that used any of the various instant-kill effect spells like [[TakenForGranite Flesh to Stone]] or Disintegrate, especially since the game was over automatically if the main character was killed. Probably the worst offender in this regard was Imprisonment, which automatically killed the target and removed them from the party with no saving throw. Once a character was hit by it, the only way to get them back was to use another spell in the same room, and because they were considered to have been removed from the party it could cause other problems like automatically ending your relationship if you were pursuing the romance side-quest with the target. The only defense against Imprisonment was to try to kill any enemies capable of using it before they actually had the chance to get it off; [[spoiler:the protagonist has the Slayer form, which is immune to Imprisonment, for some of the battles, but short of sending one's allies to a different room there was no way to protect ''them'']].
*** This was actually so bad that the improved AI scripts of the Sword Coast Stratagems II mod by default [[MercyMode do not allow enemy mages to use Disintegrate or Imprisonment on the main character]]. These scripts otherwise make enemy mages brutally efficient, but the mod's author thought the potential for an instant GameOver was just too unfair.
*** In any case, low level characters in these games are so weak that a single lucky hit or spell from an enemy can mean game over. Since you don't have many options early in the game, you are often reduced to watching your characters and the enemies trade blows, hoping that your dice rolls will be luckier than the AI's. A perfect illustration of this trope.
* The 8-bit computer game tie-in to the film ''{{Willow}}'' was ill-conceived, badly executed and features a blatant example of this. Remember the part in the film where the eponymous Willow releases Madmartigan from his prison cage? In the game, you have two blank cages: one random cage contains Madmartigan, the other contains Death (yours). Heads you proceed, tails you lose a life.
* How can you tell if someone plays ''BatenKaitos''? Mention [[ThatOneBoss Fadroh]] to them and see if they break down crying. Unless you want to spend days farming wind magnus for Xelha, Gibari, and Mizuti, the whole boss battle hinges upon when that [[ThatOneAttack Orb of Magical Offense]] comes up in his hand; if you haven't had at least three or four good turns to wear him down, you're ''done''. The whole card-based battle system comes with luck elements, but this battle just cranked it UpToEleven.
** [[DuelBoss XELHA VS. THE ICE GODDESS GRAAAAHHHHH]]. It's basically a card flip minigame. You get a choice of seven or eight cards, and have to match it with the card chosen by the Ice Goddess. Get it wrong? Xelha takes a hit.
*** [[FromBadToWorse And then there's the fact that there's a Camera magnus hidden in there.]] And you need to at least take one picture for OneHundredPercentCompletion. It's ''entirely'' possible to easily win the battle but ''not'' take the picture, which is just as, if not more, frustrating for people seeking to achieve perfection in this game (which is a very hard task, given this game doesn't have a NewGamePlus and there's ''plenty'' of items that can be LostForever, including Boss pictures). [[OhCrap And then it repeats all over again for the Wizard Shadow battle...]]
** And while we're at it, getting [[RandomlyDrops Rare Portraits]] of your characters. Sure, they have ''very'' low chances of dropping per camera shot, but since you can simply equip someone with all the cameras you have and waste away your turns [[FirstPersonSnapshooter taking pictures]] while [[ScratchDamage fighting Shawras in Moonguile Forest,]] they're not bound to be a bother, right? '''Wrong.''' There's two particular Rare Portraits that can only be taken in the grand total of '''''ONE''''' specific boss battle ([[spoiler: Malpercio in Algorab Village]], in case you're wondering). This is the ''only'' time in the '''entire game''' (sans the epilogue, that is) where Mizuti's mask is off. [[RandomlyDrops If you don't get]] ''both'' the Maskless and Mega Rare Mizuti Shots in this battle, then they're LostForever. It doesn't help that this is a ''very'' easy boss (at least, compared to the [[ThatOneBoss hell you've been through]]), and that this is a GuideDangIt because there's ''no'' indication in-game (other than the missing blanks alongside the other portraits in the Magnus List) that there's something missable in this battle, and by the time you've realized it, there's a fair chance it's too late by then.
** And there's also the accursed Trail of Souls, which is ThatOneLevel for those aiming perfect completion. It basically amounts to you playing a forward-scrolling third-person shooter in which you have to shoot down waves of enemies as they approach your ship so you don't have to deal with them (shooting down full waves gives you reward magnus or a speed boost, as you're not supposed to fall too far behind your guide). The problem is, these enemies are ''unique'' to this area, and you cannot revisit it, which means that if you don't ''purposely'' leave at least one wave alive and let it attack you, you won't be able to take the picture''s'' of the '''two''' different types of enemies in the area. Moreover, one of these guys is ''the only enemy in the entire game that drops Frost Caps'' (otherwise mediocre armor), and there's one item that can ''also'' be LostForever if you don't blow the wave to oblivion. In other words, ''unless you're lucky enough to encounter '''both''' enemy types in a single sacrifical wave, have the '''one''' enemy type who drops the missable item drop it, have the enemies last long enough for you to take pictures of '''both''' of them '''and''' make sure to kill the wave that drops the missable Secret Recipe magnus,'' you will '''not''' see that perfect Magnus List. There's OneHundredPercentCompletion, and then there's ''BatenKaitos.''
* The Bunny Races in ''StarOceanTillTheEndOfTime'' is completely based on luck. All you can do is pick one bunny (or two "perfecta") and hope for the best. Getting at most 100 points is required to trade in for a key item needed to recruit a powerful inventor.
* A scary number of battles in ''TheLastRemnant'' can turn into this, due to the fact that the AI [[RandomNumberGod randomly]] [[AIRoulette assigns]] what each union is allowed to do at the start of each turn. Including heal. This can result in a unit getting beaten down to critical HP and starting the turn without the sensible option of trying to heal their HP, usually resulting in them getting wiped and usually a game over.
* Getting your OnlyMostlyDead PlayerCharacter resurrected in ''InfiniteUndiscovery''. Since you can't give orders while dead and there is a very short time window before getting a GameOver, it's entirely up to luck whether your friends' ArtificialStupidity manages to fit reviving you into their busy schedule fast enough.
* DayOfTheIdea: Piizu is an entirely luck based mission, he can read your mind to predict your attacks, so what must you do to damage him? Confuse your entire party and hope you attack him instead of your own party. He has only 200 HP, so one hit should take him down rather quickly.
* In ''VideoGame/WildARMs1'', the only way to get into the BonusDungeon "The Abyss", you had to use a teleporter and hope it malfunctioned and sent you there, which happened rarely. Since the Abyss is a BrutalBonusLevel, you'd naturally have to go back and heal outside of the Abyss at some point. Good luck getting back in!
* ''VideoGame/ClaDun'' 's Rangeon (random dungeon) has the monster level, item drop rate and chance of items having rare titles change based on the type of gate you enter at the end of each floor. Regular Gates have little to no effect on these three variables. Angel Gates never raise the monster level by more than 1 and never lower the drop rate or rare title rate. Demon Gates and Hell Gates are guaranteed to raise the monster level, and lower the drop rate and rare title rate, with Hell Gates having more severe effects. Gamble Gates can go either way. There's always at least one gate at the end of each floor of the dungeon, but it's random which gate or gates are there, as well as whether or not there's an exit portal. All the gates' effects become greater as you reach deeper floors of the dungeon, and at the point where an Angel Gate is able to raise the drop rate and rare title rate by 40 or 50 each, a single Hell Gate can ramp up the monster level by '''hundreds'''. Even though your characters can only be level 99 at the max, enemies aren't subject to that level cap, and a Hell Gate late enough can pit you against level 300-400 monsters, leaving you no option except to run for the exit...if there is one.
* Minor example in ''VideoGame/MassEffect2'' on Insanity difficulty. At one point during Archangel's recruitment mission, you need to close a couple of doors. However, enemies are running at the doors and if one reaches the threshold, the door reopens and you have to start again. If you do not have the right class and weapon or power combination, it is entirely possible for an enemy krogan to run all the way to the door without dying no matter what you throw at it. Basically, the only way you can win this mission in a lot of cases is if the krogan AI randomly decides to stumble or doesn't spawn until it is too late to reach the door before it closes.
* ''VideoGame/TalesOfPhantasia'' has [[UnderwaterRuins the Abyss of Thor]], where to get to the TimeMachine, the party has to find a skeleton key in one of 8 chests (which is chosen randomly) and use it on one of 8 doors (chosen randomly as well), which ''may'' lead to the destination, but will often as well lead to a room with a spell for [[BlackMagicianGirl Arche]] or ''back to the entrance'' (so yes, even ''trying to leave'' may become a challenge of nerves if you're unlucky). And to make matters worse, the puzzle is resetted every time you enter the chamber.
* Some bosses in ''DarkSouls'' can be this, your survival dependent on whether or not they choose to use their large, damaging nuke attacks.
* The Son of Sun in ''VideoGame/ChronoTrigger''. If you have fire-resistant armor, this is an easy fight. If not, then prepare yourself for a wall of pain. The boss itself is immune to your attacks, and doing so results in a devastating counterattack. Around the boss rotate five flames. One of these flames will damage the boss if attacked, the other four will result in another nasty counterattack. Also, every now and then, the boss will shuffle the flames so you have to find the weak one all over again. And if you try to smartass your way around it by using a tech that hits everything, they'll destroy your whole party with counterattacks. The good news is, the boss itself has very little HP, so a few good turns without a shuffle will generally finish it.
* ''Battle Slots'' makes every battle a Luck Based Mission, in that both you and your opponents use slot machines to do battle.
* Learning spells from scrolls in D&D-based games, like ''VideoGame/BaldursGate''. It has a % chance of failure, presumably you read a scroll and either learn the spell or not, the scroll disappears anyway. SaveScumming kills the whole idea, however.
* The browser based ''VideoGame/BillyVsSnakeman'' is chock full of this to the point that the game's major antagonist is literally "[[RandomNumberGod RNG]]". This may be because the majority of the game mechanics are based around dice rolls.
* {{The War Sequence}}s in ''VideoGame/{{Suikoden}}'' are literally glamorized [[TacticalRockPaperScissors Rock Paper Scissors]] matches. Later installments expanded upon this with map-based TurnBasedStrategy combat, however much of these battles were also heavily luck-based to the point that sometimes even a supposedly winning matchup would still fail; ''SuikodenII'' in particular was an extreme offender in this regard.
* Gambling in ''VideoGame/FalloutNewVegas'', obviously. While there is some skill in Caravan and blackjack, roulette and slots are completely hit or miss, although the LuckStat can increase your odds of winning. Furthermore, as an "anti cheating measure", you have to wait a minute after reloading a save to gamble again.
* The Battle of Bucket Hill in ''VideoGame/{{SaGaFrontier2}}''. Unlike every other strategy segment where you're either heavily favored or at least just slightly disadvantaged, this is brutal. Victory hinges on 1 - Killing the Dragon's unit fast. 2 - Suffering very few if any casualties. and 3 - Making a wall of Meat Shields just out of range of the ''BigBad'' before the turn counter triggers his script to go insane. 4 - Walk straight up to the freaks on the turn the script triggers. 5 - For the love of God defend. 1 and 2 are narrow but doable odds, but doing them AND keeping your units within range of the remaining enemies and not making a mistake of crossing the line in the sand tanks the odds completely.
[[/folder]]

[[folder:Shoot Em Up]]
* In the original SNES ''VideoGame/StarFox'', there is a secret boss in the form of a slot machine. It can only be defeated by hitting three lucky 7s. And even if you do win, your reward is essentially a perpetual "[[AWinnerIsYou THE END]]" screen.
* ''SigmaStarSaga'' has this bad with its random encounters, in which you are beamed into one of several different ships for battles. The problem is that there are a few larger ships that are difficult, and in some cases, impossible to navigate between enemy fire and yes, even natural terrain. There are even a few encounters throughout the game where it takes place completely within a very small corridor, [[TheComputerIsACheatingBastard roughly half the height of the larger ships]].
* ''HeavyWeapon'' has multiple "waves" for each level. Each type of wave contains a fixed set of enemies, and lasts for about half a minute. The luck part comes on the fact that each "wave" is chosen at random, so you may be fighting DemonicSpiders over and over again if you're really unlucky.
* In ''VideoGame/{{Parodius}}'' for the MSX, the second stage ends in a game of RockPaperScissors. Lose, and you're back to the beginning of the stage.
* ''E4: VideoGame/EveryExtend Extra Extreme''. Getting high scores, especially in the timed mode, depends largely on getting enemies to randomly spawn in fortunate enough positions that you can rack up chains in excess of 2,000.
%% [See discussion page] * ''VideoGame/{{Touhou}}'' has a mild example of this, in that the exact layout of the danmaku during certain attacks depends on the whim of the RNG, though due to the way they work, there is always an opening somewhere. Early title ''Lotus Land Story'' is particularly bad about this, though - not only does it not have the limit of later games that ensures there is always an opening (thus potentially giving you completely unavoidable waves), it has an entire Luck Based ''Boss'' in the form of Marisa in stage 4 - she has a ton of attack patterns, and which one she uses at any given time is entirely up to the whims of the RNG. She's the only boss in any Touhou game apart from the spinoffs that is completely impossible to memorize. Marisa can either be a pushover or a brutal, brutal fight - and if you think you can just avoid her by playing as Marisa instead, the game responds by giving you a straight-up ThatOneBoss.
[[/folder]]

[[folder:Simulation Game]]
* Several GUILT missions in ''TraumaCenter: Under the Knife'', due to the wildly unpredictable behaviors of some of the parasites.
** Deftera is prime example of this trope, because if the like-colored guilt refuse to separate, you will lose.
* ''VideoGame/WingCommander IV'' had this built into gameplay in the form of missiles, which 1) could ''maybe'' be distracted from you by judicious use of decoys, and 2) if they hit you, were either a whole lot of damage or a OneHitKill. This meant that a large part of whether you won a particular mission depended on how lucky you were with the Decoys you dropped: be lucky and you won, be unlucky and you could easily run out of Decoys and die; and both times you were piloting your fighter just as well.
* ''AceCombat5'''s Mission 12b, "Four Horsemen," is pretty much this, the ScrappyLevel, ''and'' FakeDifficulty all in one little horrible, possibly insurmountable package. Even if ''you'' actually pull off your anti-radar site attack runs flawlessly, there's no sure 100% guarantee that your wingmen will -- and if they don't, everyone's attack run has to be aborted and started over. (At least you're the only one who can directly cause a mission failure here.)
** The above mission is rendered somewhat more trivial if you know to take the A-10 in advance, since it's capable of flying low and slow enough to give you a window to abort the attack run and turn clear without getting spotted if one of your wingmen fails. A large amount of the difficulty of this level stems from the vast majority of the game's supersonic jet fighters being too fast to pull away from an attack run at the last second without either pulling up (and thus getting spotted) or shooting past the radar (ditto) - both of which are problems avoided by the A-10.
** ''AceCombat6'' carries on the tradition with Mission 13, "The Liberation of Gracemeria". The bulk of the mission is a long and difficult air-to-ground mission, but that's only to sap your strength in preparation for fighting [[ThatOneBoss Ilya Pasternak]]. Ilya flies the game's super-fighter, which has 12-shot swarm missiles that are sometimes literally undodgeable, and your low health by the end of the mission means that even one of the missiles will probably kill you. And on top of this he takes about five times the damage of any other opponent in the game, is faster and more maneuverable than you [[TheComputerIsACheatingBastard even if you're flying the same fighter he is]], and surrounds himself with dozens of tiny, lightning-fast drones that confuse, distract, and fire at you. On top of that, his fighter is stealth, which means you will randomly lose radar lock on him and target one of the UAVs instead. It's almost impossible to win unless you catch him away from the UAVs.
*** Sure, TheComputerIsACheatingBastard there and any player can only wish their Nosferatu performed like his, but the fight isn't luck based at all. It's quite possible to reliably evade the missile spam every time if you're good enough, even on the highest difficulty.
* ''RuneFactory 2'' has the following quest: [[ExactlyWhatItSaysOnTheTin Super Training Plan: Luck!]] (thank you, Cammy, for making my non-existent luck stat go up in a game of ROCK-PAPER-SCISSORS)
** ''RuneFactory 3'' has Monica in a similar minigame, although it isn't necessary for any quest.Win three games in a row and you get some gold. Win four in a row and you get an useful item. [[DoWellButNotPerfect Win five in a row, and you get a black eye.]]
* ''AnimalCrossing'' games have paintings, and generally the only person who will sells them is [[HonestJohnsDealership Crazy Redd]]. And guess what? Half the time the painting is a fake. Know what's worse? You don't find out until you've tried donating it to the museum. And of course, don't expect a refund.
** Thankfully averted in ''New Leaf'', where fakes have subtle differences separating them from the real ones. However, it makes an old one stand out far more, namely having the piece you need be the real one. To make matters worse, only one out of Redd's four pieces of art are real, making the chances even lower.
** The other collections can be this as well, of course; fossils, insects and fish all have different degrees of rarity per individual specimen, and are more or less randomly selected.
* Mission 8 in ''VideoGame/{{Startopia}}'' has two goals: Hire 12 Zedem Monks and convert 12 other aliens. You ''will'' lose the mission a few times because the game won't give you 12 Zedem Monks before your opponent does.
** This assumes you make it past Mission 2, which requires you to cure 100 patients from diseases without accumulating over 10 deaths. Pray to [[RandomNumberGod The God]] you don't get a flood of infected aliens or get an endless supply of low-skill greys with no decently-skilled ones, or else you'll invariably accumulate 11 deaths and fail the mission ridiculously fast. fortunately, the next 5 missions are less luck-dependent.
* In ''VideoGame/VirtualHorseRanch'', the results of Gymkhana events have one rule: horses with higher training level place higher than horses with lower training level. Otherwise, it's completely random. In a rare [[TropesAreNotBad not really bad example of the trope]], it's a decent way to make money if you're no good at training for the skill-based events.
* In ''VideoGame/TheSims 2'', career chance cards can be like this. The player is presented with a scenario and must choose between two choices or ignore it.
** This is a literal Luck Based Mission: although you're presented with two choices (along with ignore), neither one is ''necessarily'' correct: when you make your choice of the two options, you have a 50% chance of succeeding. ''TheSims3'' continues the tradition, but there's a lifetime bonus available that changes chance card options to an 80% chance of succeeding.
* The ''[[VideoGame/{{X}} X-Universe]]'' games have the [[http://x3wiki.com/index.php/Retrieve_Stolen_Ship "Retrieve Stolen Ship"]] mission category. The idea is, somebody's ship was stolen from dock and they're paying you to retrieve it. Trouble is, any time the ship in question isn't a corvette or frigate, recapturing the ship requires you to force the pilot to bail out ... which is a completely random event.
* In ''VideoGame/HarvestMoon:The Tale of Two Towns,'' triggering date events (called "flower events" here) reaches this level. Whereas in previous games, triggering date events could come down to being [[GuideDangIt in the right place, at the right time, under the right conditions]], ''Two Towns'' adds the modifier of having a choice of locations for your "dates." There's a chance the proper option to trigger the flower event, rather than a regular date, won't come up. (Though since dates are the best way to improve your relation with a bachelor/ette, it's feasible to brute-force the events.)
** In the same game, [[FetchQuest villager requests]] - especially those of A or [[RankInflation S-rank]]. Often, the request will be for items you don't have, can't get in time or simply can't get period (like asking for gems or metals before the mines are open or asking for processed items when you don't have any of the Maker Sheds yet). Presumably, the player is intended to use the online connection to get the items from someone else, but that presumes you can find someone who has what you need, when you need it.
* ''DragonVale'', a dragon-zoo-simulator for the [=iPhone=], has some rather nasty luck-based gameplay where dragon-breeding is concerned. Most pairings have more than one possible result, and which you get is entirely random - with the really desireable and rare dragons often having very low odds. If you don't get the one you need, you still have to wait several ([[InUniverseGameClock real-life]]) hours for the breeding to be completed so you can try again. You can somewhat increase the odds of rare dragons being born by purchasing the Epic Breeding Island, but for the really rare ones, you're still chasing some very low percentages.
** In the most obvious cases, however, it CAN be seen as a Perseverance-Based Mission instead - if you keep at it, you WILL get an ultra-rare Rainbow Dragon sooner or later. But where the time-limited Seasonal dragons are concerned, luck becomes a very real factor - if your bad luck stays that way for long enough, time will run out on you and the seasonal dragon will be Lost Forever. Or at least for a year. Unless, of course, you were trying to breed the ultra-rare Leap Year Dragon, which was only available for about a week around Leap Day... in which case your next chance will come around in 4 years or so. Shoulda' sacrificed a goat to the RandomNumberGod, better luck in 2016...
[[/folder]]

[[folder:Sports Game]]
* Likewise in ''WiiSports'', how many errors you get (either not catching the ball, or not pitching what you inputed) will determine who the winner of Baseball is more than actual ability.
[[/folder]]

[[folder:Survival Horror]]
* ''VideoGame/ResidentEvil4'' has a few items in preprogrammed locations. The rest of the items dropped by enemies and hidden in boxes or barrels are somewhat random. The game keeps track of how much ammo, money and health the player has left and decides what defeated enemies drop accordingly. The game even keeps track of how well the player is doing; defeating a lot of enemies without damage will make it more likely that the game will spawn more and harder enemies, keep taking a beat down and the game takes pity on you. One part that is completely random are the eye gems that the Novistadors drop; for a while it was thought that the colour dropped depended on the colour of the monster's eye at death, but this has been proven false.
* [[DeadSpace Those. DAMNED. Asteroids.]]
[[/folder]]

[[folder:Third Person Shooter]]
* Every bot-battle (except space-battles) in ''StarWarsBattlefront'' is very luck based. No matter how much you pwn the enemy, your chances of winning are still kinda slim. This is mostly based on the sudden incompetence shown by your teammates.
** Another harsh example is the ''Jedi Academy''. You spend all the time covering the last three bookshelves, and, in the last minute, get overwhelmed by Jedi popping up out of nowhere, and, if you get hit once, you lose, if not, you win. The Jedi respawn in that last minute at random, too, meaning one time, you are safe in the middle of the room, the next, you get a saber through the heart from the guy spawning behind you.
* ''DarkVoid'' allows you to hijack the enemy {{Flying Saucer}}s by boarding them, ripping off an access panel and then beating the pilot. This takes some time, as you have to periodically dodge turret fire and avoid getting shaken off. This would be a pretty straight-up test of skill, not even that hard, but... The luck aspect comes from the fact that if the ArtificialStupidity collides with something while you're doing this, you get hurt, and there is no way to abort the boarding sequence if you're about to die. This means you essentially have a random chance of dying without any way to stop it, especially on higher difficulties that make you easier to kill.
* ''VideoGame/GearsOfWar'' has the first Berserker fight. Berserker is faster than you and has charge instant kill to start with. In one third of playthroughs, she'll immediately charge over Dom after the cutscene, leading to a Game Over. If this doesn't happen, you have to lure her to run into the doors, opening them for you. ''Not'' dodging the charge leads to instant death. You have to do this three times. Then you get her in the graveyard, where you have to kill her - a''charging'' enemy - with a satellite which takes five seconds to align and fire (at least, it stunlocks her). You have to do this three times as well. And the ''whole mission has [[RaceAgainstTheClock a time limit]]''. Well, it is the hardest segment of the game, not counting the final boss. And there are three Dog Tags scattered around. Good luck getting them with that monster breathing on your back.
* Completing all objectives in par time on the second Belarus mission in ''SyphonFilter: The Omega Strain'' is a coin toss, since Ivankov's papers are in one of three randomly chosen locations. Sometimes, the guard with the papers can [[GameBreakingBug completely fail to spawn]].
* ''VideoGame/{{Warframe}}'' is rather notorious for this. Want to build a new weapon? Time to hope the resources you need will drop. Looking for a rare mod? Good luck finding it with all of the useless ones cluttering up the drop tables. The Warframes Vauban and Hydroid are particularly egregious examples. Vauban's components can only be obtained through random alerts; miss them, and you probably won't get another chance at that part for a couple months. Meanwhile, Hydroid's frustration comes mainly through the multiple levels of RNG you'll need to put up with. To even access the boss that drops his parts, you'll need to farm certain rare enemies for four different kinds of beacons that each require different quantities, all to craft a key to access the boss's mission. Once you've done that, you need to hope that the boss drops the part you need, or else you'll have to fight him again (and woe betide you if you've run out of keys). There's a reason these two are the only Warframes the fans consistently recommend [[BribingYourWayToVictory buying with Platinum]].
[[/folder]]

[[folder:Turn Based Strategy]]
* In ''VideoGame/FrontMission 4'', the evade stat was changed from how it operated in its predecessor. Whereas in FM3 (and most [=RPGs=]) evade functioned as a penalty to the attacker's accuracy (which stacked with other accuracy-reducing factors like cover and would merely reduce the number of hits a round of machine gun fire or a shotgun blast would land), in FM4 evade was a wanzer's ''base chance of completely evading an attack,'' calculated completely separately from all other factors. There were various conditions and exceptions, but since some wanzers could easily have an evade rating of well over 50%, it would become quite possible (even common) for a wanzer to come under fire from an entire army and come out without even a scratch. This varied in function from being the only thing stopping you from crushing your enemy like a lame hedgehog in some missions, to being the only thing standing between you and a horrible death in others.
* In the first American GBA ''FireEmblem'', on the chapter where you have to protect Zephiel, you need to protect [[spoiler:Jaffar and get Nino (a level 5 MAGE) to talk to him]] to unlock a side-quest. Unfortunately, it's very possible for him to get killed before you're anywhere near, forcing you to restart if you want any chance at the side-chapter. In fact, ZEPHIEL HIMSELF can be killed quickly on the Hard difficulty, forcing you to restart, period. Oh, and did I mention Ursula starts moving on the last turns and can easily ruin that one attempt that doesn't get sidewinded by luck? God forbid if there are any one-of-a-kind treasures on the map too, and accessed faster by the enemy Thieves no less. Oh wait. There are. Too late.
** Speaking of ''Fire Emblem'', in ''[[VideoGame/FireEmblemTellius Path of Radiance]]'', Ike's ultimate battle with the Black Knight requires you to beat him within a certain number of turns (the game continues if you can survive these turns without beating him, though [[spoiler:Nasir dies...maybe.]] However, even having reached level 20, acquiring the Aether skill, and using several stat boosting items, the only to win is playing through the mission several times and hoping that Ike was able to pull off two Aether attacks within the turn limit.
** While we're on the subject, there's critical hits. Any unit, ally or otherwise, can get them, but normally the high stats of your party mean the only times they're an issue are when myrmidons attack generals, and that will still only do single digit damage. However, on Hard Mode for several games, normal enemies get both power boosts and the critical-friendly weapons. This means that many enemy attacks have a chance of one-shot-killing your units, and you often have several of these on a map in a game where [[FinalDeath death is permanent]]. Not the best way to go...
** There is always at least one chapter where you are storming a castle. This castle is a maze, treasure chests are scattered randomly through it (unless you are lucky, in which case they are collected in rooms), and between one and five Thief class [=NPCs=] will always begin placed on the map. These thieves will make a beeline for the chests, and then race for the exit. There is no way you will ever beat them to the chests, but if you get unlucky bashing your way through the enemy force, you may not be able to kill them and retrieve your treasure in time, which is the true challenge.
*** Although it's relatively easy to block the exit with your FragileSpeedster (read Pegasus Knight) and force them to take the long way around, as in most cases the thieves will run from you rather than fight, either making them cower in a corner away from your units or go suicidal and try to run past your main group in a desperate race for freedom.
** To a lesser extent, character growth is a Luck Based Mission since stat gains are randomly determined. Some characters may be consistently good, but too many go between spectacular failures or battlefield-dominating beasts. It's most infuriating with characters you're forced to use, like Eliwood in the seventh game.
** ''Thracia 776'', the fifth game in the series, introduces a number of "gameplay mechanics" that make playing the game infuriating: healing wands can miss at random, all units - player and enemy - have a small chance of getting to move a second time that turn, and the game's selling feature - the ability to capture enemy units and take their items - relies on you not accidentally killing them by scoring a critical hit. Even worse are the levels themselves: Chapter 11x is a map where you must rescue a prisoner being attacked by soldiers. It is completely up to chance whether or not she survives before you can free her.
** Some chapters and some games are worse than others, but the Hard Modes in most Fire Emblem games, unfortunately, rely on this as their main source of difficulty increase. At worst, there are chapters which are virtually un-winnable without cheats and with no character fatalities (which are notably permanent in the series) because the mathematical probability of all of your characters dodging enough attacks to survive is essentially zero. Chapter Four of ''Fuuin no Tsurugi'' is a prime example. Basically the entire game of ''Radiant Dawn'' when played on Hard Mode (which was actually called "Manic Mode" in Japan; when they localized it, they did away with the East setting, so the Western Easy is the Japanese Normal, Normal is Hard, and Hard is Maniac) is like that too; impossible without ridiculously-good luck and an absurd amount of free time and patience.
** ''VideoGame/FireEmblemAwakening'''s Lunatic+ difficulty practially runs on this during the first couple of chapters. While [[HarderThanHard Lunatic]] is somewhat manageable through clever use of your [[PlayerCharacter Tactictian]] and [[CrutchCharacter Frederick]], Lunatic+ adds a layer of randomness which places it firmly in this trope, by assigning random skills to your enemies in the form of souped up versions of the regular ones exclusive to this difficulty. One particular combo that will ruin any flawless strategy is [[AlwaysAccurateAttack Hawkeye]] and [[ArmorPiercingAttack Luna+]] because it makes the aformentioned heavily armored Frederick completely useless as a much-needed damage sponge. If any enemies during the first chapters gets this combo or too many of them gets Luna+, then you ''have'' to reset the chapter until they get a more manageable combination of skills, because you will not survive. Period.
* ''VideoGame/FinalFantasyTactics'' has the Roof Of Riovanes Castle mission, where you lose if Rafa/[[SpellMyNameWithAnS Rapha]], a computer-controlled ally, is killed. Unfortunately, she begins the fight closer to the enemies than any of your characters, one of them can kill her in a single counterattack, and her AI can be charitably described as "suicidal." Because of her (and the enemies) high speeds, it's entirely possible (if not probable) that you'll lose the battle ''before you get a single turn''.
** There is one trick to keeping her from going kamikaze on you. Have a faster unit use a Cure series spell that is within her movement range, and will activate after her turn. Rafa will move into said spell's range 99% of the time. Of course, having a faster unit is the problem, as Rafa herself is quite fast...
*** Or the "naked strategy." At least in the original version, enemies always go for the weakest target. Bring one or two nude soldiers in your lineup and the really dangerous enemies will nearly always ignore her.
** Even worse than the Riovanes Rooftop is the Walled City of Yardrow battle when you first meet Rapha, at least in the PSP rerelease. Your enemies include two Ninjas, who will always go before your own ninjas(if you even have one), and they start close enough to Rapha to immediately run over and throw a Katana at her, collectively killing her.
** ''Tactics A2'' has a late-game mission that forces you to protect a team of five underleveled Moogles against a powerful enemy clan. The Moogles have two members that can be described as, at best, incompetent, and at worst outright traitorous. The first is the Thief, with all the low defensive powers the class implies and considerably less than the intelligence needed to make the class ''not die'', particularly for a Moogle Thief. The second is a Gadgeteer, whose Pandora spells hit either your entire party or the enemy's randomly, and who does love his Haste Pandora. Keep in mind, if a single Moogle falls, you've lost.
*** There's a repeatable quest where you spar with those moogles to train them. Every time you beat it they get stronger; run it a few times and they will have no trouble beating the enemy clan senseless as long as you provide a little healing.
*** ''VideoGame/FinalFantasyTacticsA2'' is ''horrible'' when it comes to these, thanks to new rules for the Last System which - in many instances- turns a randomly occurring critical hit on your side into something to be ''feared''. Examples of such laws are "No knockbacks" (a critical hit automatically knocks the enemy back) and "No dealing more than 50pts of damage" (a critical will almost certainly push the damage above that). What about "No targeting units two or more squares away"? Well, since a critical hit will knock an enemy one square away so it ends its turn two squares away from you, ''oops!'' It counts as a violation. Normally, breaking a law doesn't punish you too badly, but when it comes to the Clan Trials, breaking a law counts as instant failure.
*** In another example from ''A2'', the highest-ranking Clan Trial for "Aptitude I" presents you with six identical barrels and asks you to find the "winning" one in two rounds. You don't have enough time to check all six in two rounds.
*** Then there is the trial for "Teamwork-Aptitude". Clearing the Rank 5 trial gives your clan the ever-useful "MP Efficiency" clan privilege. Problem is, it all comes down to where the Jar spawns. Sometimes it spawns is always past a group of enemies who will inflict Confuse with 100% Accuracy (Making you often waste TWO turns, that of the Confused unit and that of the one that will have to attack the Confused unit back to their senses). And if you hope to use a wise combination of speed-ground Viera and Gria equipped with hard-earned Ninja Tabis and Ribbons...the monsters will use Roulette, the game's titular and true Luck Based Attack.Namely, it kills an unit at random.It can either make your day by thinning the enemy numbers, or ruin your plans completely.
*** Another really nasty one is a mission requiring you to intentionally step on a series of traps while not using the attack function. Except that half of these traps will inflict the charm status, which causes your party members to attack each other. Which in this case will instantly fail the mission.
*** Finished all 300 missions and are doing The Last Quest? You might as well hack your game when you face off against the Thrill Seekers. You fight against a Juggler/Time Mage, Seer/Illusionist, a Ranger, and two Tonberry Kings. The moogle will spam Haste and Quicken on his party, the Ranger will either hide or use Mirror Elixir (reduces HP and MP to 1) on you, the Seer will spam Magick Frenzy (hits targets with magic and then the user's weapon), and the Tonberry Kings will just one hit kill you. Now they all go at least two or three times ''[[[[FakeDifficulty before your party can even take a turn in the beginning]]'', so it is possible to outright lose without even doing anything. Even with careful planning, you still need god's luck and hope that you can survive long enough to take the enemies down.
* Most high scores, including many 450s, in ''AdvanceWars: Days of Ruin'' relies on abusing AIRoulette or luck damage. The day-to-day guide for Wedding Ring is particularly bad because when the Infantry is starting [[InstantWinCondition its HQ capture]], it is in range of the B-Copter that is expected to attack the T-Copter instead. And of course, if the Infantry takes luck damage on the next two enemy phases, you ''will'' lose because the enemy will have an Infantry taking ''your'' HQ. But this is nothing to Metro Map, which despite being a map that [[ScrappyLevel desperately needs a Day-To-Day guide]] just loves to horribly screw over the sole one that is available.
** And in ''Dual Strike'', just surviving on Crystal Calamity in Normal Campaign is this if you don't cheap out money forces or Colin. If Black Hole sends the Black Bomb toward Red Star, you're screwed, simple as that, as you '''will''' get cut off from the silos.
* Getting all of the rare and legendary equipment in ''Franchise/{{Disgaea}}''. Especially the ones that ''only'' appear as a boss's stealable equipment, so you have to hope the RandomNumberGod decides that it has a rarer version than usual this time. Or the items that ''never'' appear as enemy equipment, like the absolute cheapest weapons and the usable items.
** It gets even worse when you try and find RESIDENTS which you can use to soup up your weapons stats beyond levelling them up normally, sometimes they will be on near impossible to reach terrain, You must be the one to kill them to recruit them, and they attack both allies and enemies near them. It's even more luck based when you have to reroll shop loadouts to find the resident type you want (You may even find a Gladiator in a healing item for crying out loud!)
* If you get the Map extension that inflicts the Gamble status in MakaiKingdom, you either hit the enemy for all it's health or Whiff entirely, the same goes for your party as well since the extension will affect everyone on the current map.
* ''Videogame/Godzilla2WarOfTheMonsters'' for the NES used an on-screen slot-machine to decide how much damage you deliver and take in each battle with the monsters. It was so very random, you could take out Godzilla or Ghidorah with a simple gun on a truck meant to deliver parts for the Moonlight [=SY3=], or conversely, watch as Baragon took out the Moonlight [=SY3=]. How you rolled at the start mostly determines the entire game.
* HeroesOfMightAndMagic IV, the final map of the Order Campaign could inadvertently become this. In a locked-off area of the map you are given a computer ally who story-wise is holding off the big bad to buy you time to find the Macguffin. The Luck comes in with the fact that the 'mission victory condition' is specifically set so that YOU must be the one to kill the BigBad, yet it is entirely possible that your 'speed bump' of an ally will somehow manage to take him out first, making the mission un-winnable.
[[/folder]]

[[folder:Turn Based Tactics]]
* It's possible to play ''{{X-COM}}: Terror From the Deep'' and never encounter Calcinites, because they never spawn in the same mission as Lobstermen. An autopsy on a dead Calcinite is required to research and develop advanced melee weapons, which makes fighting Lobstermen significantly easier.
** Worse yet, it's possible to never encounter Deep Ones (or at least not until very late in the game), and until you capture a live Deep One, you can't get any decent armor. Once you capture one, it's still possible to do the research on in the wrong order. Luckily there's another bug in the game that lets you research the best armor without ever having the prerequisites. And that's only a few of the known problems.
* In most of the ''{{Suikoden}}'' series, fights are fair. Even Pahn's duel with Teo in the first game is winnable if you take a few precautions. Then SuikodenII comes along. Normally the major battles are fair and you lose only when it's scripted. However, one of the fights involves saving Ridley from an ambush - [[CaptainObvious if he falls, you fail.]] It's possible that the low-defense Ridley Unit will be defeated and captured ''before your other units even appear on the map.''
** Fortunately, it's possible to rescue Ridley at a later date if you fail here. In fact, the dialogue for the next mission assumes that you failed - they will discuss Ridley's rescue while he's standing right there. (Someone screwed up the dialogue epically for this mission, as it also mentions "Valeria's unit" even if you chose to recruit Kasumi instead.)
** Major battles in II as a whole are luck based, since most units can only take two points of damage and it's mostly/all luck whether an attack will damage or not. The only reason why people don't complain about it much is because most of the major battles are just too easy even if the player gets a bit luck screwed.
* A perfect strategy and mastery of the numbers can still get turned on its head when the Random Number Generator gets ornery on you in ''YggdraUnion'', especially if you're trying to get a fast clear bonus on a mission and secure bonus equipment (which can require you to [[ILetYouWin plan to lose some fights]]). A unit with a high Luck stat will get "flash" (critical) strikes frighteningly regularly and turn a sure-thing battle against you entirely too easily. Of course, having a lot of Luck on your side grants you the same consideration...
* Getting the best outcome of ''VideoGame/{{Fallout Tactics|BrotherhoodOfSteel}}''' Springfield mission usually boils down to the AI failing to kill its unarmed hostages or you succeeding at a lucky hit that knocks down one of the units responsible for arming the bomb on the power plant. Stealth and picking the right troops to cover each objective helps to some degree, but once the bullets start flying it's really just down to the dice.
* The 2013 version of ''TabletopGame/SpaceHulk'' can devolve into this, based off of several criteria: where, and [[ZergRush how man]], Genestealers spawn each turn; how many Command Points you generate in a turn; and where randomly-placed/facing Terminators spawn in. Technically, since everything short of "move to this spot" is determined by [[RandomNumberGod a roll of the dice]] this applies everywhere, it's most obvious in the above areas. One mission may flood you with more enemies than even multiple Terminators on Overwatch can handle and you die in 2-3 rounds; you then might replay and merrily march to the mission objective without significant hassle.
[[/folder]]

[[folder:Wide Open Sandbox]]
* {{Minecraft}}:
** The ever-useful Iron and Diamond ores are randomly scattered underground. Unless worldgen mercifully spawned you above a pre-generated mineshaft, expect to do a LOT of digging before finding any considerable amount.
** Prior to the Pretty Scary Update, [[note]]pre-release 12w40a, to be specific[[/note]] finding Slimeballs was also tough, since they can only be obtained from Slimes, which werere surprisingly rare, and only spawn in large enough caves in the bottom ground layers. Even if all conditions for their spawning are satisfied, there still are several other monsters that can spawn in their stead.[[note]]Y<40, so you have to be fairly close to bedrock. The space must be large enough to spawn a max-sized slime, or none will spawn at all. 90% of the game area just plain doesn't spawn slimes. And even when the game tries to spawn a slime in a valid area, there's a 90% chance it just says "fuck it, no slimes this go" and ''doesn't''.[[/note]] The Pretty Scary Update simply allowed them to spawn in Swamp biomes at night.
** In order to start growing Pumpkins and Melons, you have to find their seeds (a random drop from chests in a mineshaft, which isn't even guaranteed to spawn near your starting area) or a wild grown pumpkin (randomly scattered on the surface). Since Melons are used in healing potions, and Pumpkins are necessary to build all kinds of Golems, you need some luck if you want either of them. Once you get that first seed, you're pretty much set for life, but ''that first seed''...
** Even just ''starting the game'' can be ruined by poor luck. Spawn in an ocean biome? [[TruthInTelevision Just as in reality]], oceans are ''enormous'', even if you're ''not'' playing in a Large Biomes world. Trees, for obvious reasons, only grow on land. You need wood to, well, ''do anything'' in this game. You'll save a lot of time and effort just starting over if this happens.
* Several Missions in ''VideoGame/GrandTheftAutoIII'', due to the Stanton/Shoreside bridge opening and closing on a timer, relied on a fair amount of luck. Unless you took the tunnel, but that's just downright suicide if you're in a hurry.
** Perhaps not so much luck based as TheComputerIsACheatingBastard, but one side-mission involving the collecting of a line of dropped items became near impossible after a certain point in the game when the Mafia becomes aggressive to you. The mission takes you right through their primary neighborhood and they blow you up near instantly with their shotguns.
** Rampages in ''VideoGame/GrandTheftAutoIII'' (and its sequel, Vice City) typically require the player to destroy a certain number of gang members/vehicles within a time limit. These are ''very luck'' based as targets appear at random. Also, since vehicles and pedestrians often only spawn in the area when the player isn't looking their way, these rampages often have players frantically maneuvering the camera around, willing more targets to appear.
* The "Supply Lines" mission in ''VideoGame/GrandTheftAutoSanAndreas'', in which the player must use a remote-control plane to take out four targets moving around San Fierro and return to the starting point before running out of fuel. The mission is impossible unless the second target spawns very close to the first- if you take too long to reach it, the last two targets will have spread apart by the time you reach them, and you won't have enough fuel to destroy them and make it back to base.
* ''VideoGame/GrandTheftAutoIV'' features a number of missions requiring the player to evade the police. This requires the player to escape a large circle of coverage where the cops are looking, if a cop car is nearby the cops will see you and the circle will re-center. This leads to a situation where the player must escape the circle while praying that a cop car won't spawn right next to them, making all that work escaping the circle completely void. Either that, or they must escape into the Pay and Spray, hoping a cop car doesn't spawn there, as the Pay and Spray won't work if a cop sees you go in.
** Or go into the subway, where cops can never spawn, and drive away uncontested. Though missions never require you to evade very high wanted levels to begin with. By the time the scripted part of the mission is over the wanted level always drops to 2-3 stars when you need to escape, even if it was higher at first.
* ''GrandTheftAutoChinatownWars'' is pretty good about this during the story missions. They're hard and at times incredibly frustrating, but they're usually the same every time. The side missions are a different story. Rampage and Riding Shotgun missions are entirely based on where the enemies spawn. The lottery is, obviously, a lottery. Finding dealers and security cameras can only be accomplished through aimless driving. The list goes on. Fortunately, [[GuideDangIt maps and guides exist.]]
** Oddly enough, the lottery, obviously the most luck-based section of the game, is actually fairly predictable. To be more specific, if you buy enough of the more valuable tickets that have a chance to provide you with a safe-house, you may make a temporary loss but if you keep it up over time, you're virtually guaranteed to make a profit eventually. Take it from someone who spent about an hour trying for that safe-house: Bring enough seed money, and the tickets are infinite and easy cash. How the manufacturer stays in business is anyone's guess... On the other hand, money means nothing in that game anyway considering how ridiculously easy it is to get thanks to the idiot-proof drug trade that tells you exactly what to do at any given moment to make tons of cash. Which is just as well since the actual missions give hardly a pittance to compensate.
* The later levels of Activities in ''SaintsRow'' definitely qualify; Level 8 Drug Trafficking is nearly impossible when three or more FBI [=SUVs=] are ramming the dealer's vehicle at once, ''into other vehicles'', and you still have to get across the entire city to the next buyer. The luck lies in if you can dive out of the burning vehicle, not die when it explodes, heal yourself before the Feds ventilate you, revive the dealer (who invariably gets blown up with it), take a new car, and do it all over again thirty seconds later. Unless you're an ''expert'' at picking off drivers from the passenger's seat of a moving vehicle, these missions will drive you crazy.
** Insurance Fraud. You're on a road and your goal is to get hit by cars. These cars spawn at random intervals in random numbers. You only have a few minutes to get to the scoring goal (in the later levels, over 100000 dollars worth of points), and you don't even get the insurance money to make up for that horrible activity.
*** It a different story when you venture onto a freeway. The endless flow of speeding oncoming traffic makes this side mission ridiculously easier than if you pick an street-level intersection as instructed. Still, it's a matter of luck for the game to direct you to a district which has a freeway.
*** Also, take a helicopter to the mission start location. Get in it immediately after start, fly up to max elevation over the freeway, and dive out. Aim for a car. Congratulations, you just got half the money needed to win the highest level.
** The Mayhem activities in the second game require a good amount of cars spawning, a good bonus car being chosen, a good region being chosen (each location randomly chooses one of several regions, some of them much better than others), and the police not constantly ramming into you and knocking you down. Have fun.
** The Escort Activity. You drive a prostitute and her john around while a "Pleasure" meter builds up. When it is maxed out, you win that Level of the challenge. You are sometimes tasked with a secondary objective, such as driving to a club, during which you do not accrue any more Pleasure until it is done. Collisions, stopping the car, or firing your weapon on other vehicles will reduce your Pleasure meter. You are also being pursued by news vans who are attempting to get footage of your passengers. This fills a "Footage" meter, which ends the Activity in failure when it is maxed out. The Footage meter does not diminish. At the higher levels, you can still outdrive the news vans if you are skilled, but groups of vans will spawn randomly along your path as you escape the initial ones (much like how the police continue to spawn when you have antagonized the law). You WILL be crashed into (both reducing your Pleasure meter and increasing the Footage meter) unless you are lucky enough to have the news vans spawn with enough distance for you to try to avoid it.
*** Fortunately both Insurance Fraud and Mayhem are made easier if you [[spoiler:"cheat" by using aircraft. For Insurance Fraud, you can get a head start on points and instant 100% adrenaline by stealing a plane and jumping out over the destination suburb. And the attack helicopter, armed with a Chaingun and Annihilator [=RPG=]s, makes Mayhem a lot easier.]]
* There are three types of Events (side missions) in ''VideoGame/{{Prototype}}'': War, Kill, and Movement. Each gives a medal based on completion time (War, Movement) or kill count (Kill). Depending on the Event, this can either be fairly easy or absurdly difficult. One Event in particular is the Raid War Event, which requires beating the enemies in 1:25:00. As if being limited to the crappy grenade launcher weren't bad enough, skill plays almost no part. Your enemy is actually the game itself. The game will, more than half the time, screw you over by either a) withholding reinforcements (namely a tank which will take out the enemies faster than you can hope to in the time limit) or b) withholding the ''enemies'' (by not spawning them). Other Events are better because they're either more generous with time, more generous with spawns, or let you use your powers.
[[/folder]]

!!Non-video game examples:

[[folder:Board Games]]
* Many board and card games, especially those intended for younger children, are based entirely on luck, with no skill whatsoever. War, Chutes and Ladders, the Game of the Goose and Candyland are prime examples.
** And many games that have ''some'' skill have rules that allow {{Unwinnable}} situations to arise by pure luck. An example is Sevens: if you have five Aces and Kings (or cards forming chains leading into Aces or Kings), you can kiss any chance of finishing first goodbye, and if you have all eight terminal cards (all four Aces and all four Kings), [[{{Unwinnable}} you will not go out]]. The flip side is if you happen to have a hand exclusively containing 5s, 6s, 8s, and 9s, you can pretty much manipulate the field however you please. If the game just happens to be Shichi Narabe (the Japanese version of Sevens which places a limit on how many times you can pass), you can force everyone to pass three times with such a hand and force them out without them being able to play a card.
** There is a reason why Candyland is usually the first instance in which a child figures out how to cheat to win. It doesn't take long for the kid to figure out how to stack the pile with purple cards.
** Candyland, Chutes and Ladders, and so on often explicitly have the rule "the youngest player goes first." This stacks the deck in favor of the child winning. Obviously, anyone old enough to figure that out is also probably old enough to only play such a game to entertain a young child. TropesAreNotBad.
* Battleship can have this, especially in really close outcomes. Bob has sunk Alice's entire fleet save her cruiser, which has only one square left. Alice, meanwhile, has sunk Bob's entire fleet save his destroyer, which also has one square left. From the misses Alice has already made, there's no way she won't know where the last remaining part of his ship is; it's called process of elimination. Bob, meanwhile, has a one in two chance of getting it right, and it's his turn. If G4 is a hit, he wins. If G4 is a miss, Alice finishes him at F9.
[[/folder]]

[[folder:Live-Action TV]]
* Several Barry-and-Enright game shows use luck in their bonus games:
** ''Series/TicTacDough'' had the "Beat the Dragon," where the objective was to uncover cash amounts to achieve a total of $1,000 or more, or screens reading "TIC" and "TAC" on a 3-by-3 game board before revealing the space concealing a dragon. Completing the former objective won the cash and a bonus prize package; finding the dragon first lost everything.
** ''Series/TheJokersWild'': The contestants spun a giant slot machine, whose windows would reveal various cash amounts ($25 to $200), but also hidden in there were cards with the face of the Devil. Finding a Devil card before earning $1,000 -- or rarely, spinning three of the same cash amount, which won the game automatically -- ended the bonus game with nothing won.
** ''Bullseye'': The contestant had an alloted number of spins (either seven or 10, depending on when in the run the episode aired) to avoid "being struck by lightning" in one of the three windows. Finding a lightning bolt ended the game automatically with nothing won.
* ''Series/MinuteToWinIt'' is hard enough on its own, but its Million Dollar game ''Supercoin'' definitely qualifies as a Luck Based Mission. You have to bounce a quarter off of a table and get it into a water jug 15 feet away with a 1.75 inch mouth (barely larger than the quarter itself). It'd be difficult enough even if you could aim properly, but because you have to bounce the coins off the table, you have virtually no control over where those quarters are going. Few have come close; none have succeeded.
* During the early seasons of the original ''AmericanGladiators'', the final Eliminator round had a channel for each contestant, one of which randomly had a BarrierWarrior at the very end, hidden behind a paper wall. In other words, one contestant got a free ride while the other had an extra obstacle. Effectively, this turned what was supposedly a game of skill into a game of chance.
* ''Series/ThePriceIsRight''. Skill is not able to help you with all of the Pricing Games. If you can get it to 50/50, that's great. Otherwise, you really have to hope the RandomNumberGod is with you.
** The Wii/PC game... well, let's start by mentioning that the price of the prizes fluctuate BETWEEN GAMES. Pen and paper will not save you.
* Many obstacles in ''Series/TakeshisCastle'' are essentially luck-based.
** The penultimate one ("Final Fall" a.k.a. "The Man-Eating Holes") is entirely so: there are five pits, three lead to the castle, the other two of them hides a guard (in disguise) - if the contestant chooses one of them, he/she is eliminated.
** "Sumo Rings" - where the contestant wrestles an opponent, it's decided by what coloured ball they pull from a box. It could be: Animal (a strong man), an actual sumo wrestler, Spud (a man in a potato costume), an Emerald Guard, Jo, or a pathetically weak man.
** "Tug of War" - in the second version the contestant must choose to pull a certain rope without knowing what's on the other side. It's been a bulldozer, an elephant, Yoroi, an actual cow, etc.
** "Roulette" - contestants dig in a pit for discs to tell them where they sit on a giant roulette board. The number, colour or odd/even the ball lands on is eliminated.
** "Prod" - a one-time game where a contestant from a team jousts a randomly chosen person with lances over a pit.
** "Nautiball" - another one-time game where the contestants are randomly put into teams and play against a randomly chosen group. Possibilities: a professional volleyball team, Emerald Guards or women in swimsuits.
** "Skittles" - contestants are in giant bowling pin suits (the positions are chosen by randomly picking a card) and a Rainbow Warrior pushes a giant bowling ball down a hill towards them. Sometimes the ball misses all of them; most commonly it'll hit the few at the back edges or the person at the front. The middle back person has the highest chance of success.
** "Knock Knock" - a contestant has to run through a series of walls that have a choice of doors. Some are paper (two of them), one in the third wall has a net (meaning he's lost) and one or two are wood (if a contestant breaks a wooden one by running too hard into it, he gets to go through). This only counts when contestants play one at a time; when they play all together the first one hundred or so go through.
* ''Series/TheAmazingRace'' has at least one "Needle in a Haystack" task per season, though they're usually put in Detours so teams don't have to do them.
** Perhaps the most famous instance of this were the hay bales of Season 6. If you do the math, there was actually a ''seven percent chance'' of finding a clue if you started up the hay bales. The percentage did increase when you reduced each haybale, but there were 270 out there to begin with. Poor Lena & Kristy were out there for over 10 hours and were eliminated by Phil in the field, when Lena ''[[{{Determinator}} refused to stop]]'' unrolling Haybales. When the hay bales were revisited in Season 15, it was thankfully more merciful, but there were still one or two teams unrolling haybales for hours while another had to unroll only a couple to find the clue.
** And sometimes, all that separates two otherwise equal teams is one team drawing a [[HypercompetentSidekick hypercompetent cabbie]] at the airport, while the other draws a cabbie [[TooDumbToLive that doesn't know how to read a map]].
* ''LegendsOfTheHiddenTemple'', the temple is largely based on luck. You won't know where the temple guards are until you find them.
* Lampshaded by the very concept of the British game show Fluke. The whole thing was based entirely around luck, and at no time could skill, stamina, strategy, knowledge or anything else have any impact on the outcome. As an example, if the end game came down to a decisive final question, it was decided by a literal coin-toss.
* ''DealOrNoDeal'' is entirely luck. Contestants pick one briefcase with a random amount of money and eliminate other briefcases with random amounts of money - with no way of telling what's where. The only decisions contestants get to make are when the banker periodically calls and offers to buy their briefcase for the average (rounded off to the nearest $100 or so) of all the remaining money values leaving the contestant to decide to make the deal or not.
** There was exactly one non-luck based outcome on this show. One contestant inadvertently broke the cordless phone prop that the host used to call the banker - the banker then lowered his offer by $10 to compensate for 'expenses'.
* Billed as "a game of hunch and ESP", ''Series/{{Mindreaders}}'' certainly fit the bill. For example, one contestant had to look over 10 audience members, then guess how many of them took an aspirin that morning.
* By US federal law, ''all'' game shows based on state lotteries are mandated to be luck-based missions. The most entertaining of these were the California Lottery's ''Series/TheBigSpin'' and the Ohio Lottery's ''Series/CashExplosion'' (the last of its kind).

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[[folder:Pinball]]
* {{Pinball}} as a genre was actually banned in America for two decades for this reason, as people believed it was a form of gambling. The ban was lifted after writer Creator/RogerSharpe managed to demonstrate ''in court'' that pinball required actual skill to play.
* In Creator/SternPinball's ''Pinball/HighRollerCasino'', the Craps game comes across as this, as it has a difficult target to shoot, an open-ended number of shots to make, and can only be advanced during single-ball play.
* One of the complaints some players have towards the ''[[Pinball/GilligansIsland Gilligan's Island]]'' pinball is that Multiball can be started only as a random Lagoon Treasure reward, instead of being dependent on the player's skill.
* ''VideoGame/PinballArcade'' has several of these as standard and wizard goals. ''Bride of Pinbot'' has a goal of scoring a Jackpot, which can only be lit as a result of a random value on the Small Wheel. ''Scared Stiff'' has a goal of having a ball saved by the spell, which requires the ball to drain down the left outlane, which can only happen randomly.
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[[folder:Tabletop {{RPG}}s]]
* Nearly any RPG scenario can turn into one of these by accident since it's all but traditional to resolve success-or-failure questions with dice, especially if the GameMaster decides to roll "honestly" and stick with the results no matter what, but early [[DungeonsAndDragons D&D]] is a particularly good example: random character generation, random save-or-die effects (notably poison, which would almost always simply kill you on a failed saving throw), random wandering monsters, published scenarios with yet more random effects...it took a while for the role-playing community to work out that there can in fact be such a thing as relying on the dice too much.
** For example, the (fictional) campaign shown in DM of the Rings lasts numerous multiple-hour sessions in which the players fight battles and solve puzzles. Success or failure is decided entirely by a dice roll at the very end, over which the players have no influence. Nothing they had done was at all relevant; even if they'd all died, the roll would have happened and played out however it would.
** ''TabletopGame/WarhammerFantasyRoleplay'' could have luck-based-missions in ''character creation''; not only were characteristics determined by dice roll individually (rather than "roll X dice and place the results as you see fit") you also had to roll twice and choose a result for your ''career''. Have no strength or toughness, but roll up two hand-to-hand fighters? Flub Intelligence and end up with scholarly types? Tough luck, Nancy. Although not written in, it was an unwritten, universal house-rule that you could, instead, CHOOSE your career either before or after rolling your characteristics.
* One ''TabletopGame/{{Pathfinder}} Society'' scenario requires you to defeat a number of DemonicSpiders before the GM rolls 9-10 on a d10 3 times. If the GM is rolling hot or said monsters take the time to break your best weapons first the mission becomes nigh-impossible.
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