Developers' Foresight
aka: The Dev Team Thinks Of Everything

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The developers thought of everything. No, really. Write anything.note 

"At first, Stanley assumed he'd broken the map, until he heard this narration and realized it was part of the game's design all along."
The Narrator, The Stanley Parable

Some games keep a tight rein on the player's capacities. Others never realise in time the full scope of the Combinatorial Explosion and break like a fragile twig the first time a creative player gets a grip on them. Only a brave few dare try and respond wittily and internally-consistently to absolutely everything a player could try.

This is where you go out of your way to get around the limitations of the game, somehow break it, or find other inconsistencies, but once you get there, you find that the dev team has already thought of that possibility. This is where you're not supposed to be, or any place it would take an unreasonable effort to reach. It can also be trying out a vast number of tricks and item combinations and find that each one is accounted for in the game code.

Take note: It's not just about specific reactions where they could've just put a generic one, situations you stumble into randomly, or Easter Eggs found in far away places. It takes thought and effort to find out that the dev team really is one step ahead for this trope to come into effect, when they think about details and events they wouldn't have been expected to.

See also Easter Egg, Crazy-Prepared, Artificial Brilliance, and Genius Programming. Compare The Producer Thinks of Everything, where the creators of a TV show seem to have planned out very, very far ahead, and Unexpectedly Realistic Gameplay, when the developers think about this, but the player doesn't. Contrast with They Just Didn't Care.


Examples:


Other Examples

    open/close all folders 

    Adventure Game 
  • Bloodborne: Performing gestures in front of the Plain Doll causes her to react in various ways: she applauds, bows, and tilts her head curiously depending on the gesture used.
  • The Legend of Zelda:
    • In The Legend of Zelda: Ocarina of Time, it is possible to leave Dodongo's Cavern after obtaining the Bomb Bag, use bombs to access Zora's River, and complete Jabu-Jabu's Belly before the remainder of Dodongo's Cavern. If you do so, the game will correctly state that the Zora's Sapphire is the second Spiritual Stone Link has recovered, rather than the third.
    • In The Legend of Zelda: The Wind Waker if the player sequence breaks and completes the Triforce of Courage before finishing the Wind Temple (possible if one retrieves the Hookshot from the temple, then leaves to collect the Triforce before finishing the dungeon), the King of Red Lions will admonish Link to head to Hyrule rather than collect the Triforce after leaving the Temple.
    • In The Legend of Zelda: Twilight Princess, if you introduce yourself to Ashei at Thelma's bar, her dialogue will change when you meet her again at Snowpeak.
    • In The Legend of Zelda: Skyward Sword, Remlits are invincible and swim to shore if thrown in water. Nothing unusual for Zelda animals. Throw them off Skyloft, though, and they'll start flapping their ears and fly back up! They also sing along if you play the harp.
    • In Hyrule Warriors, there is a glitch that can make you play as one character, with another characters' moveset and weapon. If the player happens to play as Zelda with Lana's Summoning Gate, instead of the theme song, Zelda will hum Zelda's Lullaby.
    • In The Legend of Zelda: Breath of the Wild, this is taken to extremes. For example, if you encounter enemies in tall grass and start a fire upwind of them, the fire will spread toward them and eventually kill them. If you then fly over the burning grass on the glider, the heat will create an updraft that gives you extra height.
  • Quest for Glory: The series had a ton of these, especially amusing for players who think of particularly creative ways to get themselves killed. If you play as a thief, you start out with a lock pick in your inventory. If you type "pick nose", the hero will stick the lock pick up his nose and die, and you will get a game over. However, if your lock-picking skill is high enough, you will get a message that says, "Success! Your nose is now open!". Later games have the game reply "Success!" with the same sound effect the player hears when picking a lock. This also increases your lock picking skill.
  • King's Quest VI has Alexander Breaking the Fourth Wall to yell at the player if they made him fall repeatedly during one sequence (if he wasn't killed by said fall).
  • In the Hitchiker's Guide To The Galaxy text adventure, it is necessary to the plot at one point to "enjoy Vogon poetry". Earlier, you can "enjoy mud" (it's nice and squishy!), but if you try enjoying Ford, you are sternly told that this isn't that type of game. Additional fun can be had by inputting random words into the Guide — it has entries on some very unlikely things. Also, the game will often refer you to a footnote (Like SEE FOOTNOTE 9), and when you type "footnote 9" it tells you something. If you keep on going through the footnotes (Trying footnote 10, 11, 12, etc) eventually you get a string of "There is no footnote (number)", until you finally get "It's fun reading all the footnotes, isn't it?"
  • Leisure Suit Larry in the Land of the Lounge Lizards, being the first Sierra game to be publicly playtested, included a wide variety of possible inputs to any situation, often with comedic responses: During playtesting, the developers would take note of various phrases used by players in certain situations, and think of new ways for the game to react to it. For a particularly amusing example, typing the command "masturbate" at any time would result in the prompt "The whole idea was to stop doing that, Larry!"
  • Zork:
    • The game responds to commands such as "win" and "die", and characters react to the phrase "Hello, Sailor".
    • In '’'Zork II'', at one point you come across a room containing naught but a giant bucket. If you should type "kick bucket" while trying to Get Ye Flask, the parser helpfully replies, "Kick the bucket? OK, if you insist. *** You have died ***"
    • "Eat", 'Eat what?', "Eat Self", "auto-cannibalism is not the answer."
    • "Count Blessings" results in "Well, you're playing Zork, for one..."
  • The entire point of the interactive fiction Pick Up the Phone Booth and Aisle. Just start with the title alone, and try flying, swimming, or some infamous IF buzzwords, really, anything, and see the results. PUTPBAA is a combination of two earlier games with a similar concept: the author's own Pick Up the Phone Booth and Die, and Aisle. The latter game takes place in the middle of a grocery store, and only lasts a single turn. The player can use this window of time to perform such psychotic actions as climbing the grocery shelves, or stripping naked.
  • Super Metroid has an odd example of this, as explained during this 2014 Awesome Games Done Quick any% speedrun. By using a glitch via the X-Ray Scope, it's possible to get out of bounds and complete the game in a much shorter time than normal (the speedrun in question finishes the game in 17 minutes, real-time). At the end of the run, it is explained that the "out of bounds" glitch can be used to drop the player down 20 or 30 rooms, past the final boss and right into the ending, but if certain portions of this normally-impassible area are accessed, the game compensates by putting up blocks to make it effectively impossible to use this trick again. It doesn't just do this on one file, but across all present and future files, regardless of their creation date. This may be the only instance in the game that actually discourages Sequence Breaking.
  • In Metroid: Fusion, it's possible to leave Sector 4 without collecting the Diffusion Missiles by doing an incredibly difficult series of Shinesparks. Doing so will award Samus with a secret message commending her on her skillful use of the Speed Booster before telling her to go back and get the missiles the correct way.
  • In Metroid: Zero Mission, steps are taken to make sure the player can continue ahead using with ridiculously complex Sequence Breaking. If the player gets the Screw Attack early, the Ripper that must be frozen so that you can stand on it during the Kiri Guru boss fight cannot be killed by the attack, unlike other Rippers. And it's even possible to beat the game with only 15% (as low at 8%) of all the items, with hidden routes that allow you to proceed forward.
  • The Interactive Fiction game Counterfeit Monkey is set in a world in which people are capable of removing any letter from any object's word/term to change it into an entirely different object (e.g. removing the letter 'l' from 'pearl' to change it into a pear), a concept that naturally makes for tons of potential letter-wrangling and object transformations, and it pulls it off beautifully. To list just a handful of examples of the game's staggeringly expansive implementation:
    • The crowd at the fair will normally cheer if you solve the word-balance puzzle by changing the apple or pear to something heavier or lighter (e.g. changing the apple to an ale), but they will gasp in disgust instead if you do so by changing the pear to a (clearly severed) ear.
    • It is fully possible to make a cock ring. Attempting to wear it prompts a snarky response from the (male) character currently sharing your (female) body. Showing it to the professor who wants you to change a naughty term to an innocent one causes him to have a hilarious reaction.
    "Waterstone sees what you've made of the cock, and clutches desperately at his hair as though he's going to tear it out in tufts. His eyes bulge and water. I've never seen the man so close to apoplexy. I think that was exactly the wrong thing, somehow."
    • In fact, the game has various amusing responses to you doing...suggestive things with naughty-sounding items. Putting gel on the (chicken) cock/(church) member/(donkey) ass will cause Alex to awkwardly cut short his typical description of "you rub an amount of gel on the [object]", and trying to get the bartender to paddle any one of these objects into their homonyms will cause her to smirk and refuse to do so.
    • If you buy the Britishizing goggles and examine the power cord you get much later on in the game with them on, the cord's prongs will be described differently than if you had examined them without the goggles on.
    • If you get the crazy idea of shooting the anagramming gun at its own reflection, it turns into an anagramming gnu. Then the gnu sees its own reflection and changes back into a gun to prevent Unwinnable by Insanity, and you're even rewarded with an achievement!
    • If you still have the rock at the end of the game, you can bypass the kayak puzzle entirely by changing the rock to a roc and getting a free ride across the ocean on its back.
  • In the final sequence of Day of the Tentacle, you can attempt to go up to the attic and close the door, but Bernard will say that Purple Tentacle might lock it and trap them up there. There is no reason to go up there in the first place, so it's surprising that there's a specific line to deal with such a situation.
  • Ben Jordan: Paranormal Investigator:
    • Using the "Touch" icon everywhere will, in the final case, sometimes bring up a message chastising you for acting like Hercrabbiness, who in her Let's Play of the series enjoyed using it on everything and everyone she could try.
    • At one point in case 5, the player will have a blowfish that has not been prepared properly (read: Poisonous) in their inventory. Sure enough, there is an actual response to the player telling Ben to eat the poisonous blowfish.
  • Minecraft: Story Mode:
    • At the first crafting table, you're given a couple of items and asked to create a sword. However, due to the particular set of ingredients given to you, you can create a lever instead. Doing this nets you an achievement and a bemused reaction from Petra, who tells you to try again.
    • When you're asked to choose between Olivia and Axel's plans at the end of the first episode, they start listing reasons why you should go with their choice. If you stand around long enough they eventually fall silent and just wait for your decision, but if you wait even longer...
      Axel: Uh... goggles.
      Olivia: What?
      Axel: I'm running out of things to say.
    • In one puzzle, Jesse has to craft something that can be used to hit a pressure plate at the opposite end of a room. The most obvious solution is to create a bow and arrow, but creating a fishing rod will also solve the problem (you end up using the hook to activate the plate).
  • The Curse of Monkey Island:
    • The clock in Puerto Pollo is powered by the clock of the computer running the game. It even plays a bit of LeChuck's theme on the hour.
    • There's a series of small signs on Plunder Island set up by the Naturalists' Society. One of these is next to a thorn bush in a patch of quicksand. It identifies the bush as a "Papapishu Bush" and explains that "papapishu" is a native word meaning "ouch". After reading the sign, Guybrush will say "papapishu" instead of "ouch" for the rest of the game. If he doesn't read the sign, he says "ouch" as usual.
    • When Guybrush meets Palido Domingo on the beach, he can ask him how long he's been sunbathing. Palido will say he's been sunbathing since the month three months before the date set in the computer. If the game is played in January, he adds "By the way, Happy New Year".
    • There's a few Easter Eggs that can be found by repeatedly doing things that most people would stop doing when nothing happened initially.
      • If the player tries to walk into the lagoon on Blood Island, the game won't let them. If the player persists, Guybrush will eventually walk into the water and find his The Secret of Monkey Island self drowned and tied to the Idol of Many Hands.
      • If the player reenters the crypt where Stan has set up his insurance business, all they will get is a greeting from Stan. If the player enters enough times, Maggie from The Dig will appear on the spider's web in the corner and a spider will appear and drag her off.
      • On Skull Island, Guybrush relies on LaFoot to winch him down to King Andre's cave. LaFoot always loses his grip and drops him until Guybrush uses an umbrella to float to King Andre's cave. If the player lets LaFoot drop Guybrush enough times, Guybrush will finish his business with King Andre and take care of one last thing before returning to Blood Island: climbing back up the mountain and throwing LaFoot off.

    Fighting Game 
  • Super Smash Bros. 4 has one of the stages being the Spirit Train from The Legend of Zelda: Spirit Tracks, with Link operating it. But if either Link or Toon Link is selected to fight, then Alfonzo will be driving the train. Similarly, the Dream Land 64 stage still has the "King Dedede sometimes floats by in the background" element that it had in both the original Super Smash Bros. and Melee, but unlike those two games, Dedede is playable now, and if he's selected to fight, that background element simply won't appear.
  • In Fist Of The North Star Twin Blue Stars Of Judgment, Kenshiro's "Hokuto Zankai Ken" super imposes a time limit on his victim, in which they lose the round via classic Hokuto pressure point hitting when said timer runs out. However, when done on Souther, nothing will happen to him at all when the timer runs out and he even laughs about it, reflecting his dextrocardia immunity to Hokuto Shinken.
  • In Mortal Kombat X, Erron Black's X-Ray Attack has him firing a Marked Bullet, with the name of his opponent etched into it. There's one for every Kombatant, including himself, Rain, Baraka, and Sindel, the latter three who aren't even playable characters.
    • Raiden's "Bug Eyes" Fatality involves shocking the opponent's head till both of his/her eyes pop out. If used against Kano, who only has one eye, only one eye will pop out.
    • If Ermac defeats an opponent with a Brutality, he says "We are many. You are but one." If he wins against Ferra/Torr, he says "We are many. You are but two."
    • If the Predator performs a Brutality, he walks off the field toward the background. If he wins on the Kove, Krossroads, or the Pit (which would have him walking off the stage), he instead boards his cloaked ship.
  • The console versions of Guilty Gear XX Accent Core up to Plus R include a bonus "GG Generations" option which changes the game's mechanics slightly to resemble previous games. "GG" mode changes how Instant Kills work so that they can be repeatedly used and escaped from via onscreen button prompts. If the victim misses the inputs they eat an immediate unfailing Instant Kill. Yet Order-Sol's Instant Kill "Dragon Install Sekkai" is a long and complicated button combination, and the actual IK portion only triggers if the victim's health is low enough, so how did the dev team work around this? When Order-Sol's in "GG" mode, performing a successful IK here triggers his EX form's IK, "All Guns Blazing."
  • In Marvel vs. Capcom 3, the Kattelox Island stage normally has Tron Bonne in the background next Tiesel Bonne, cheering on the fighting. If Tron Bonne is one of the fighters, though, she will disappear from the background and Tiesel will cheer her on instead. One step further: If two Trons fight each other, Tiesel will appear confused and stare at the two of them trying to work out what's going on.

    First Person Shooter 
  • Black Site Area 51: In one level you start off near a gas station, if you shoot the sign for it, one of your teammates will remark "I don't like those prices either".
  • The Nameless Mod:
    • It has this all over the place, mostly because as a mod for a nearly 9-year-old game, they know all the exploits in the engine. For example: climbing over a fence before you can unlock it will result in an NPC on the other side asking how you got there, and listing some of the possible methods, such as grenade climbing (sticking a grenade to the wall, jumping on it, sticking another to the wall, jumping, removing the first, and repeating).
    • In The Nameless Mod there is an area that you will only be given password information needed to enter if you ally with one faction. If you remember the password and use it to enter while aligned with the other faction you will receive special messages commenting on your entry and giving a little information about the area.
    • Not only that, if you break the game's plot by doing something like killing a plot-important NPC (who are normally protected by armies of goons and robot turrets), the game will actually call you out on it (in the form of a large talking logo of the modder group, no less), and ask you why you felt it was a good idea to try to break the game, with answers ranging from in-game justified reasons to "It seemed like fun". The logo will then kill you for breaking the game.
  • The first time the Luteces appear in BioShock Infinite after Booker has a weapon, he can try to shoot them. Doing so results in them remaining unharmed and saying "You missed." Continuing to shoot them results in an Overly Long Gag of them saying "Missed. Missed Again. Four out of five? And a miss. We can do this all day."
    • If you hang around the Luteces after they've finished their first speech, they'll eventually tell you that it's pointless to wait around for them to leave, but they'll disappear as soon as you're not looking.
  • Tower of Guns:
    • If you are smart enough to climb out of the level main area of the Battlements state and jump off the Tower while possessing the Long Fall perk, you find yourself in small secret stage with developer Joe, who pretends to be surprised by your actions and warns you that levelling and player stats may behave oddly. After that, you have to start from the very first level.
    • If you jump (or fly) too high in the Battlements, you get a warning message warning about possible “buggy collision detection at such heights”. However, if you strive for the ascension to the very top of the Tower (which is very unlikely since it may require stacking 20 double jumps with increased jump height or obtaining an exceedingly rare gun with recoil so strong that it can serve as a jetpack), after climbing those humongous clockwork-like steampunk mechanisms, there is another message from the dev that congratulates you with “breaking the game”, and a reward consisting of even more perks that are, well, quite useless if you are so good to have reached the top.
  • Unreal Tournament 2004 has the lightning gun sniper weapon. It's hitscan and has no area damage, so it's theoretically impossible for players to kill themselves with it. However, just in case someone, somehow, does manage to do just that, the devs left in an appropriate suicide message: "<player's name> violated the laws of space-time and sniped himself".
  • The training tutorial in Counter-Strike: Global Offensive takes place inside an enclosed target practice room, and opens with an announcer asking you to empty your gun into the target in front of you. He will acknowledge your actions if you decide to instead empty your gun into everything but the target.
    • Additionally, when the training surprises you with flashbang training (by dropping one in front of you), the game reacts if you react appropriately.
  • Quake: in the first map of the third episode of the Scourge of Armagon expansion pack, at the beginning you have to ride a trolley across an acid-filled chasm while fending off deadly explosive volleys from Vores, reach a tower and fight your way up for a key. Or, you can sequence-break the whole thing by climbing the surrounding cliff walking across an extremely thin ledge, and hop right on top of the tower. The game acknowledges this by triggering a message that reads "You're not supposed to be here!"
  • Team Fortress 2
    • Like most Source Engine games, players have the ability to type "kill" into the developer console to instantly die, in case they get stuck somehow and needs to respawn as a last resort. When a team wins a round, during the brief time before the next round starts, they gain 100% critical hits while the losing team loses access to their weapons, something that fans have come to call "humiliation". Lest players decide to suicide to deny their opponents a free kill, the "kill" command is disabled during this period. (The Soldier's suicide-bomb taunt, however, is not; this was probably intentional.)
    • The Spy has an unlockable invisibility watch called the Dead Ringer, which instead of activating immediately, will cause him to feign death when he is attacked, leaving behind a fake corpse as the real spy vanishes into the shadows. Because this is a video game, a real kill would do a lot more than just ragdoll the spy's player model — his weapon would drop to the ground, his name would be grayed out in the scoreboard, a kill notification would appear in the top right, and the killer would earn a point and, in certain circumstances, possibly also a Steam achievement. All of which have been taken into account and will trigger upon a fake kill, just in case the player is paying extra close attention.

    Miscellaneous 
  • The Mystery Case Files developers tend to think of everything a player might do, however odd or counter-intuitive. For example, in Escape From Ravenhearst, you can run every object accessible at the time through a scanning device, and see its X-ray image; if you're playing the Collector's Edition in which tokens must be gathered and energized, the tokens' scans show sparkles after charging, just like the tokens do.
  • Where in Time Is Carmen Sandiego? (1997):
    • It's actually possible to try and use the time cuffs on people, usually for a funny comment, such as a Roman saying "I'm cleaning up - but not through thievery!" or Ann Tikwitee saying "Uh gee, I don't think there's a thief in my pocket, do you?"
    • Using a battle axe on Rock Solid makes him say, "OUCH! Don't cut me down to size!" while he makes a surprised face.
    • Giving a torch to Hatshepshut results in her saying, "CAREFUL! Or you'll singe my false beard!"
    • You can actually try using items together or hand them to people, often getting you a response where they tell you something about that item. The only time wherein you don't get a response and it just puts it back are say, assembling pieces or where you would expect them to not need it.
    • One case involves using a phonograph. Everyone you can actually speak to (sans the crook) will have a response and you can actually play the recordings back to the people for their responses.
    • In addition, some Dummied Out content suggests even further foresight from the writing team, as there are some deleted lines that result from actions that cannot occur in gameplay. For example, there is a line that can only result in attempting to use the time cuffs on Gutenburg - this cannot ever happen, as he cannot be interacted with once the carmen note is assembled. There is also some humour in the dummied out content, such as how you could apparently use the torch on a mummy and be told, "This is a mummification, not a cremation."
    • Suppose you're feeling a little cheeky during Gutenberg's case and make the notice say "Thief on the goose", "Sheep on the loose", or "Sheep on the goose". Gutenberg does indeed respond to these rather than the normal "This is gibberish!" when you mess up.
    • In-universe, the case in the USSR requires the player to assemble the punchcards in order for Yuri Gagarin's famous space flight. If you assemble them out of order, the computer actually does point out that you failed to place them in order.
  • One remix stage in NES Remix has you play through a mirrored version of World 1-2 from Super Mario Bros as Luigi. The instructions are "Get to the Goal Pole!". If you beat the level by taking one of the warp pipes instead, it counts as a Miss.
  • Levels in Motocross Madness were square valleys delimited by sudden and very steep mountains, apparently impassable. If, however, you got enough speed and approached them at the proper angle, it was possible to - just barely - climb on top, and find a flat, featureless land. The curious player who would then ride off in the sunset, expecting to find a fall into the void, an invisible wall or just an out-of-bounds crash, would then find that the devs had foreseen this, and planned accordingly. Cue a cannon sound, followed by the player and bike being launched back inside the level boundaries at ridiculous speed.
  • In the video game version of Who Wants to Be a Millionaire?, entering in one of the names of an actual million-dollar winner (such as John Carpenter or Dan Blonsky) will cause Regis to mock you and enter in a more disparaging name such as "Phony Cheats".
  • In the V.R. game Job Simulator, there's a copy machine that duplicates whatever you put on it. For example, if you put a stapler on it, you get a fully functional stapler. So what happens when you physically put your face on it? You get a brain.

    MMORPG 
  • Star Trek Online is starting to work its way there. More recent missions have had numerous failure conditions and alternate methods of accomplishing goals. In the Romulan series, for example, there are several Dialogue Trees, with new options opening up depending on the character's diplomacy level and several sections where a violent character could blast through without even talking at all. There are numerous points, even in the earlier missions, where a sufficiently sneaky character can approach enemy soldiers and eavesdrop on them to learn potentially useful information ahead of time, which they wouldn't have heard otherwise.
  • World of Warcraft:
    • Back in the days before the Cataclysm expansion pack was released, if you went through a demon-infested gorge, jumping in exactly the right places and using a since-patched glitch known as wall-walking (which was literally jumping up a normally untraversable wall or terrain in a very precise manner to trick the game into thinking you've grabbed a foothold), you could enter the then-uncompleted Mount Hyjal. When you got there, you found a zone that was actually fairly fleshed out, including the skeleton of Archimonde. The actual note that merits this entry: construction signs telling you that you weren't supposed to be here and better get out, and you would receive a debuff called "No Man's Land" that instantly teleported you out even if you somehow manage to enter it. There were even rumors that you would be automatically reported to a GM upon receiving the debuff, as the player would have had to deliberately and willingly break the rules of the game by using an exploit several times to get there.
    • Also, when water walking didn't apply to mounted people and it was nigh impossible to get to it, an island to the south-east end of Kalimdor had a message in a bottle with, basically, "How did you get here?!"
    • If you make a rude gesture at Mountaineer Pebblebitty (which you are likely to do, considering what she puts you through), she has an appropriate response ready.
    • Most city guards will react to emotes, /rude them, they respond in kind, salute them, they salute back, etc. etc. Also, flex your muscles at them. They are not impressed.
    • The Mists of Pandaria quest "Li Li's Day Off" requires you to take your NPC follower (a kid up for some sightseeing) to three predetermined places she wants to visit. However, you can take her around on a tour through the entire Valley of the Four Winds zone first, which, while not required by quest objectives, will make her comment something about every place you visit. She's very much a Little Miss Snarker, so taking the full tour with her is worthwhile at least once.
    • The Dominance Offensive storyline for the Horde in patch 5.1 makes you constantly travel to various locations, mostly by asking the indigenous Tak-Tak to give you a kite ride. However, one piece of the long quest chain asks you to travel to Silvermoon City, which is on another continent, and to boot, about the farthest from Pandaria that you can get. The quest designers expect you to take the portal; if you speak to Tak-Tak instead, he says, "I ain't flyin' a kite to Silvermoon City! You crazy?" You get a similar retort Alliance-side if you ask to take a kite from the Alliance base in Krasarang to Darnassus (which is about the same distance away as Silvermoon is from the Horde base).
    • Rogues who had completed a questline Wrathion gave them will be acknowledged by Wrathion when they talk to him in Mists of Pandaria.
    • In the Well of Eternity dungeon, where you go back in time 10,000 years, players who looted the Warglaives of Azzinoth from Illidan will be noticed by his past self. "You seem prepared."
    • Similarly, wielding the now-unobtainable Atiesh, Greatstaff of the Guardian while fighting Shade of Aran in Karazhan will prompt him to yell "Where did you get that?! Did HE send you??". This is a reference to Atiesh's original wielder being Aran's son, with whom he had a... rather strained relationship.
  • In Warhammer Online, the devs watched alpha testers get to some pretty strange places, and rather than fixing it, they either added kegs of dynamite to blow yourself up, so you can respawn where you are meant to, or by adding high-level boss characters you can fight if you can get an entire party to that spot.
  • RuneScape:
    • A magic shop keeper gives out free Mind Runes and Air Runes every five minutes or so. Trying to sell the freebies back to him will net you a sarcastic comment.
    • There was a glitch where it was possible to enter the Draynor Bank Robbery cutscene and pick up the Blue partyhat that would drop. This partyhat actually has a different Item ID than the regular Blue partyhat and is untradeable. If the player attempted to equip it, it would disappear and a message in the chatbox would say, "Please send in a bug report and tell Jagex how you got that hat."
  • Kingdom of Loathing:
    • The game has special messages for certain things that can only be obtained through exploits, such as finding plurals for unique items (Ex. The plural for Emblem of Ak'gyxoth, an item rewarded to the very first person who summoned Ak'gyxoth, is literally "Emblems of Ak'gyxoth, you dirty exploiter"), or trying to do unclickable actions via HTTP links (Ex. Attempting to use a Comfy Sofa without owning one will result in you in falling to the floor and taking damage). Hot stuffing, an item that can only be crafted by using a JavaScript command, is listed in the Discoveries section under the "Dirty Exploits" category.
    • At one point during the Sauceror's Nemesis Quest, they create a potion that turns them into a slime, allowing them to infiltrate the slime convention. You can't use skills and are treated as though you don't wear any equipment. So, totally useless. Now, there is a bonus dungeon inhabited by other slimes called the Slime Tube. It is a rather high-level zone, usually reserved for Aftercore. so, if you go into this tough area in that useless form, you get an Easter Egg.
    • The Zombie Master class's playthrough focuses on attacking enemies and eating their brains. There is exactly one regular monster that will never drop a brain — a mummy (a type of zombie that had their brains taken out during preperation).
    • During the Naughty Sorceress quest, you eventually come across a door that can be opened by any key, the contents of the door changing to reflect what key you used. Normally, you're supposed to use 6 keys that many would not have if they rushed through the game without exploring (e.g. many players had no idea the 8-bit realm existed and therefore never knew the existence of the digital key). That's not this trope. What is however, is if you decide to insert a balloon monkey... You literally get an easter egg balloon.
    • A Chefstaff is a stick that does piddly squat physical damage, but grants immense bonuses to spell damage. If you attempt to club enemies with one, you'll discover they have five unique attack messages specially prepared for just such a case, three of which berate the player for not using an all powerful staff for its intended purpose. One of these five messages however, "You pretend your enemy is a pinata, sadly your beating doesn't dislodge any candy, but it does do X damage." will change into "You're holding a large stick. You're fighting a pinata. You let nature take it's course for X damage." if you actually are fighting the one pinata monster found in the game.
  • In Final Fantasy XIV, completing certain quests in different orders will yield slightly different NPC dialog to reflect this. For example, if you complete "The Adventure of the Fainting Goldsmith" before "Manderville Men", then when you meet Godbert Manderville a second time, he will remember that you gave him a fantastic massage and will thus recognize you as "he/she of strong yet supple fingers".
  • Destiny:
    • If you use the point emote to dramatically point at Crota during your battle with him, he notices and angrily points back.
    • If you hide from Skolas instead of fighting during your battle with him in the Prison of Elders, he'll make various comments in Fallen language such as getting annoyed at you for hiding or thinking that you've run out of ammo.
    • Headshots are massively effective on all enemies except Vex; since their brains/cores are in their torsos, they'll keep fighting even if you completely blow their heads off.

    Platform Game 
  • Extra Mario Bros, a ROM hack of the original Super Mario Bros., has this as well. The original SMB engine is full of bugs, but in the hack, there's no way to get stuck. Ever. And there's plenty of out-of-the-way secrets that require you to use these bugs to get to otherwise inaccessible areas.
  • Psychonauts:
    • At one point in Psychonauts, you have to go into the minds of a few people to assemble a disguise to trick the warden. A lazy or creative player might think that just jumping into the warden's mind would be quicker. The game will let you try it, but all you'll get is an amusing note explaining that the warden is protected against psychic interference. Similarly, if you try to jump into any of your fellow campers' heads, you'll get a notice saying that the mind-jumping-device won't work on minors.
    • In the normal course of gameplay, after saving the turtle Mr. Pokeylope, you carry him for about 30 seconds before losing him forever. If you decide to take Mr. Pokeylope to camp after saving him, every camper reacts to him in different ways, mostly involving how adorable he is. In fact, almost every NPC in the game reacts differently to every single power-up you use on them, and every item you could possibly show them. The PC version on Steam even made showing him to all the campers unlock an achievement.
    • One particularly amusing example: Using the "Rose" item from Black Velvetopia on the dog painters will make them tell you to "Go find someone your own species."
    • The Lungfish Call item makes a "specific" sound. Using it near Dr. Loboto has him tell Sheegor to "go outside if [she's] going to do that."
    • Some of the best responses to the Confusion attack show up in Fred's mind, which is cleared of its inhabitants by the time you're technically supposed to be able to get Confusion.
    • Using cheats early in the game allows you to use powers that you're not supposed to have yet on characters that might not be around at the time you're actually supposed to have the powers. Using cheats in this way often results in amusing dialog that you wouldn't hear if you played through the game normally. Using confusion on the G-Men is particularly hilarious. "Oh my God, why am I holding a gun?!"
    • Clairvoyance allows you to see through someone else's eyes, specifically permitting you to see the world as they do. Each and every single character in the entire game, including every single enemy type and random animal just hanging around, sees you differently. Seagulls see you as a cat, Censors (basic enemies) see you as a virus, your love interest sees you as a dashing prince, etc.
    • Much like with the warden, if you just try to steal Gloria's award with invisibility or telekinesis instead of going into her mind, you get unique scenes where she thinks the thing is going off on its own and won't let it leave anyway.
  • Banjo-Kazooie: One of the questions in Grunty's Furnace Fun has you match a character to their Voice Grunting, introduced by Grunty with the rhyme "Listen well and make your choice, which character has this dumb voice?" It's possible for the voice in question to be Grunty herself, and if this happens she'll say "which character has this cool voice", not "dumb voice". She wouldn't insult herself, after all.
  • Banjo-Tooie: Via the use of in-game cheat codes, it is possible to progress to later levels earlier than intended. The game will not let the player enter a boss fight that they are unequipped for, usually resulting in a line of dialogue that hints at where to find their moves.
    Chilli Billi: You don't stand a chance against me. Get back to the Cliff Top and complete your training!
  • Yoshi's Island:
    • It turns out Bumpties can steal Baby Mario if he's knocked off Yoshi's back next to one. The twist? This very, very rarely comes up in the game by default, so they programmed in behavior for an unlikely situation that's only likely through going out of your way to take damage and that's so obscure even Mario Wiki didn't know about it until recently... From here.
    • Similarly, all the bosses are just regular enemies grown to large size by Kamek's magic. One of them, Naval Piranha, can actually be killed before the boss battle if you very carefully edge close enough to see her but not close enough to trigger the cutscene. If you kill her first, Kamek flies in, panics and retreats, and you avoid the entire battle.
  • In Jak II: Renegade, there are barriers all over the city to prevent you from Sequence Breaking. However if you let a zoomer glide through the field and try to hop on it halfway through the game will blow you up and report "Trespasser Neutralized."
  • Castlevania: Dawn of Sorrow has a boss named Dmitrii, who is a Ditto Fighter - any attack Soma hits him with, he'll use in turn (though no matter the level of Soma's attack, Dmitrii always copies it at Level One). This includes nearly every attack in the game, including ones you can only possibly have in this fight on a New Game+. He can even copy Hell Fire, the attack you can only learn by completing the game on Hard. What's more, he's also able to copy the attacks used by the characters in Julius Mode.
  • Skylanders:
    • Jet-Vac uses a vacuum device to attack and fly. His flight capabilities are limited and indicated by a gauge based upon how much compressed air he has in his tanks. If you deplete some of it, and activate the secondary attack (which sucks enemies towards you), he refills it.
    • Several skylanders put hats on in different ways. Some skylanders that already wear hats will actually swap them out with another one if you equip it.
    • The first Boss Battle in Swap Force is a Bullfight Boss where you have to trick the boss into running into the wall at you and crash. To do this, the player must have their Skylander in the boss's sights, and the boss will follow you if you walk around. Two Skylanders (Stink Bomb and Stealth Elf) have abilities that let them turn invisible. If you are in the boss's sights and turn invisible,, then the boss will not follow you around.
    • In Spyro's Adventure, there are crystal walls that are normally invulnerable and require bombs to destroy... unless you are using Prism Break, whose expertise is altering crystals.
  • Copy Kitty:
    • If you get severely injured in the tutorial (which you will most likely have to be trying to do, considering it's the freaking tutorial) you actually won't be able to go below 1 health, meaning you can't die. This changes the conversation with Savant after the level, where he reminds you that the rest of the game won't be so easy.
    • It's possible to beat 'Very Large Robots' without piloting one of the Virs mechs. This will cause Boki to complain about the level's difficulty, and Savant to hint that you should have just used one of the robots instead.
    • The whole Arikan battle is chock-full of this:
      • Beat Arikan with any cheat, and they'll call you a dishonorable scum. Lose to them the same way, and they'll berate you.
      • If you beat Arikan with a Virs, the ending dialogue is different than the usual "You dishonorable scum!"
      • Lose to Arikan using any construct, and they'll call you a traitor.
      • Start a battle against Blade Arikan with a Yolomo of the Sun Fist, and he'll challenge you to see if fists are better than swords.
    • The ways you could refuse Arikan's challenge yield interesting results. Here's a list of things you can do to get different reactions:
      • Shoot them, and they'll ask if you'll fight with your hands.
      • Jump on Blade Arikan, and he'll get pissed off and called you immature.
      • Kick Blade Arikan, and he'll ask if you'll fight with your feet.
      • Wait for too long, and they'll get impatient.
    • If you exit the game immediately after running it without doing anything, Savant will point it out and ask if you ran it accidentally.
    • The Throne Gehligrukai's tune changes to fit the music currently playing. Yes, that includes the Arikan-only battle music that doesn't appear anywhere else by default.
  • Poker Face had the foresight of blocking off the Giant Muncher with an invisible wall in the intro of Super Mario World: Piranha Island to prevent the player from doing something stupid with Mario.
  • Ratchet & Clank: Going Commando gives you a full stock of ammo for weapons you buy unlike the first game which only filled them with half the maximum. The only exception to this are the guns from the first game which you buy from an abandoned Gadgetron facility which would be using the old policynote . And even then, the guns only have a quarter of the max ammo because the place is so run down.
  • Super Mario 64 DS includes boss dialogue to characters who don't get to battle the boss (usually Yoshi), just in case you make it to the boss with that character. Goomboss is an early example. In addition, a boss arena is slightly altered so Yoshi can fight it - specifically, Eyerok, who is positioned so that Yoshi will have a difficult time just reaching the arena. The developers added a fire for Yoshi to eat in case one goes out of their way to get Yoshi to fight Eyerok.
  • In Super Mario Maker, if you enter a pipe or Warp Door, and the exit is blocked off in some way, you get a brief animation of Mario trying to get through the other side before returning to the entrance. If both sides are somehow blocked off, then Mario will lose a life when he tries to go through them.
  • Sly 2: Band of Thieves has the "Security Announcement" during the tutorial in Cairo, where Bentley will attempt to keep the guards calm and resume normal duties. Normally when you hear this, going down the stairs to the first Rope Walk part, you'll be heading away from Bentley but if you double back to him you'll see that the character model actually does the motions of speaking these lines.

    Puzzle Game 
  • Pony Island:
    • Retroactively invoked; some players had the gall to replay the stage at EXP Beach enough times to actually get 100 EXP in Adventure Mode, so a patch made it so you do get the Pony Wings from doing this.
    • Didn't get all the tickets on your first run? And now you know which one(s) you missed? No problem. After completing the game the Start Menu is glitched to include a 'select chapter' option.
  • The Talos Principle: If you choose to scale the Tower, you will have to use some help from The Shepherd, who fills the role of the second player in the cooperative puzzles. Through some heavy puzzle and platforming skills, though, you can do the area without it - and it will earn you a developer's cameo near the top, as it has been anticipated.

    Roguelike 
  • Dwarf Fortress
    • If you piss off the humans or elves enough to start a war after letting their guild representatives wander through your fortress, they avoid any traps said representatives have seen.
    • There was a report on the forums of a dwarf that got disemboweled and somehow managed to recover. Everywhere he walked, he'd trail a little "~~". ASCII Gorn strikes again.
    • If a standing unit loses the ability to stand (either from legs/nervous system injury or losing consciousness) and has another unit's weapon stuck inside them, they continue standing up because the game can actually tell the other guy is holding them upright.
    • In Adventure Mode, kobolds that are within the player's field of view but in the dark show up as ", to represent their glowing eyes. If the kobold in question has lost an eye, it will show up as '.
    • If you convict someone of a crime committed against them, the other dwarves will be "outraged at the bizarre conviction against all reason of the victim of a crime."
  • Spelunky:
    • If you approach a shop after killing a shopkeeper previously, "You'll pay for your crimes!"
    • If you attack the Damsel in one of the kissing parlors:
      "Hey, only I can do that!".
    • Bombs can be used to destroy traps or prevent certain traps from triggering, and may also be used to remove pools of water and lava. Clearing out the pools of water will kill any fish swimming in them.
    • The Thwomp-ripoffs can smash through the falling platforms.
    • Destroying a shrine to Kali causes spiders. Do it again and you get punished with a ball and chain. Third time lucky? It spawns a ghost and makes the level dark. Oh dear.
    • Man-eating plants promptly explode when they devour live Shopkeepers and Fire Frogs, although the former, if not damaged enough, often survives. note 
    • In the unlikely circumstance that two trees in the Lush area are generated side-by-side at the same height, their tops will form one long canopy..
    • If you pick up an item in the shop but figure the price tag is too steep, then you can always blow up the shop, right? If you touch the merchandise, walk out, and attempt the Ballistic Discount technique above, then you will be shot the moment you light the bomb instead of when you throw it into the shop.
    • In the HD version, during the ending, when the character(s) are flung out of the volcano, they would normally faceplant into the sand; if any of/the player(s) have a parachute, it will deploy and they float gently down.
    • In the HD version, you can sacrifice yourself to Kali if you happen to be stunned while on her altar.
  • HyperRogue:
    • The description of Demon Sharks says that they are demons from Hell that fell into the water. Sure enough, if a demon follows you across...
    • Anything that creates fire will ignite the flammable materials in the Vineyard and the Dry Forest.

    Role Playing Game 
  • Final Fantasy:
    • The Dark Elf's cave in Final Fantasy IV is surrounded with a strong magnetic aura that prevents any metallic equipment from being used, since the Dark Elf is weak against metallic weapons. Ordinarily, if any of your characters is using any metal equipment in this dungeon, they'll be afflicted with a permanent Paralyze status. However, you can use your newly acquired Global Airship to fly to a town that sells silver/mithril equipment before going to the dungeon. Since silver is a non-ferrous metal and mithril's like silver, they're completely unaffected by magnetism, so you can use it in the Dark Elf's cave without penalty.
    • In Final Fantasy V, Krile gets knocked out by a psychic migraine from Ghido. If you return to Bal before completing the Barrier Tower, she'll respond with the same line about Ghido calling. Since Ghido is halfway around the world and requires a new vehicle to reach him, it's pretty common to move right on to the Forest of Moore after you finally get to him. But if you do go all the way back to Xezat's fleet, grab the wind drake, and fly all the way back to Bal, Krile will say that her headache has cleared right up (although Galuf tells her to stay in bed anyway).
    • When you reach Ramuh and Esper Terra in Final Fantasy VI, the dialogue for your party members is non-specific, each party member saying the same thing, no matter who's in what position. But if you take a party that consists of just Wild Child Gau to this encounter, the dialogue changes to properly reflect his Hulk Speak.
    • Final Fantasy VII:
      • Tifa and Cid get special dialogue for generic sidequests if you do them when they're leading the party. Some of it changes the plot slightly - for instance, where Cloud tells Yuffie he doesn't care, Tifa will try to reason with her. They even have dialogue for scenes that it's not possible to legitimately access with Cid or Tifa as leader; like the buggy breaking, or leaving the Chocobo outside the mines if you haven't been to Kalm yet.
      • Normally, Don Corneo's reappearence is a time for Cloud (and/or Tifa and Aeris) to face an old enemy again, and the sequence is written like that. But if you bring a party to the Wutai Theft quest that doesn't contain anyone who had previously encountered Don Corneo (e.g. with Cid as leader), the scene changes to make it clear that neither Cid nor the Don have no idea who the other character is or why they're messing with each other.
      • The Post Final Boss is supposed to be finished off by unleashing Cloud's Limit Break. But, if you just stand there and do nothing, Sephiroth will eventually attack Cloud. This attack is gravity-based, so it can't kill Cloud, no matter what his HP is. Even then, Cloud will automatically counter-attack, winning the fight anyways. In fact, searching the game's code shows just how much foresight went to this battle, too. Attack Sephiroth and do no damage? Attempt an attack and miss? Attack and heal him? He'll still go down.
    • In Final Fantasy IX, Quina is an Optional Party Member during the first disc. If you recruit him/her, the game will acknowledge that s/he is with the party during Disc 2, and s/he is Put on a Bus via a Running Gag where Quina is almost always the one left behind. Returning to Qu Marsh on Disc 2 will have Quina greeting Zidane&Co and Zidane asking how s/he escaped Cleyra. If the player did not recruit Quina in Disc 1, then the scene that plays when they just meet Quina for the first time plays.
    • Final Fantasy IX also has a hierarchy for who "leads" the party when Zidane is not present. This normally applies to the Desert Palace, but if Zidane is removed from the party for the final battle, the game will designate a "leader" who gives the "World of Cardboard" Speech to the Final Boss. note 
    • In Final Fantasy X, while it's a big Guide Dang It, it's possible to obtain the aeon Anima just after defeating Sin for the final time. The cutscene that plays once you get it reveals that Anima was created from Seymour's mother becoming a fayth. Summoning Anima against Seymour Omnis (the only battle against any of Seymour's forms in which you might have Anima) has Seymour comment "You would stand against me as well? So be it!"
  • In Dragon Quest VIII, after you meet Red, she'll send the party to retrieve a tear-shaped gem in order to get Princess Medea back. However, it's possible to go to the dungeon, clear it and obtain the tear before talking to Red (with no in-game indication that this is an option). If you do, a cutscene will play after you leave Red's shack where Yangus admits to Trode that he played up his response. Knowing Red as well as he does, Yangus knows if she found out that the party already got the tear, she'd just send them after something else.
  • Golden Sun:
    • In The Lost Age, after lighting the Mars Lighthouse, the player controls Felix only, which means that the psynergy 'Mind Read' shouldn't be usable. With the help of ROMs and cheat codes, it can be given to Felix. Using Felix's newfound ability in Prox results in new information in the mind reading dialogue boxes the developers put Mind Read text in normally non-mindreadable characters. Not just text, which would just be there to prevent the game crashing over an impossible action, but plot hooks.
    • Atop Jupiter Lighthouse prior to its lighting, Agatio and Karst also have Mind Read text, though Sheba isn't in the party at that time, either. Both are thinking that Felix has outlived his usefulness, foreshadowing the upcoming boss battle. Agatio's thought bubble contains a typo.
    • It does this quite a bit. In the first game, if you enter Altin Mines without the Force Psynergy needed to cause a path-opening rockslide, Garet will get frustrated and kick a wall, causing the rockslide. In fact, the Force Orb's absence in The Lost Age if a file from the first game is not imported implies that this is either the default scenario, or the developers knew that otherwise people would be asking how Isaac's team completed the first game in a non-import file..
    • It's possible to go to Imil before Kolima in the first game. If Mia's in your party when you trigger the Kolima cutscenes, the game has extra dialogue so she'll get lines, and it's rumored (though not proven) that Tret's boss fight gets a difficulty boost to account for your larger party and higher level.
    • If you set Flint to Ivan while he's briefly in your party at Vault, he will apologize and give Flint back when he leaves. This just happens to keep him from being in another class in a later cutscene when he rejoins and uses a power exclusive to his base class.
    • It's been discovered that you can glitch-exploit Retreat to skip the part of the game where Mia joins the party. In doing so, you also skip the only part of the game where Mia's unique Ply power is required for puzzles. A boss later in the game provides an artifact that lets other characters use Frost, so you can solve Frost puzzles without her, keeping the game from being Unwinnable by Mistake without her.
      • Using the same glitch in another location lets you access the other Djinni in Mercury Lighthouse, so you can still get 100% completion in The Lost Age (finishing the first game with 27, transferring data to TLA, and using the spawn point in TLA for the Djinni Mia would have normally given you).
    • In The Lost Age, if you give the Lash Pebble to Piers and you go to Lemuria, when Piers will leave the party you will need to Lash once to enter the house of Lunpa. However, if you can't use Lash, Lunpa will insult you and throw down a rope instead, preventing you from getting stuck. This is the only use of the "rope throwing" animation in the game.
    • In The Lost Age, replying "No" to everything eventually results in Kraden throwing a tantrum and accusing Felix of thinking this is all just a game.
    • When in speaking roles, Djinn tend to have increasingly-amusing responses to being continually denied, and a character in the first game will complain if you change your mind repeatedly in one cutscene and cause the conversation to loop.
    • In Dark Dawn, you can use Slap Psynergy to ring the emergency gong in Tonfon, sending the city into a panic, then blame the nearby guard for the false alarm.
    • In Dark Dawn, you cannot name your character any name that belongs to another player character or plot-relevant NPC (including Alex). This has not been confirmed for the other two games.
  • Alpha Protocol's story progression runs on this. At first, it just seems like little things, like characters calling you out on wearing ridiculous sunglasses or if you're wearing cammies in a public place where it would be better to wear civvies and blend in. Your character sheet even comes into play. The simplest example being an instance where Mike decrypts some encoded files he's swiped on a mission, unless you haven't put any points into the tech skill. In that case Mike is computer-illiterate and his handler handles the files instead. Multiple playthroughs will reveal just how far-reaching your little decisions are; every choice has a consequence, even dialog options that seemingly do nothing but influence whether or not someone likes you, because different reputations with different NPCs always have different, tangible results. Many players assume that the game is somehow unfinished or that, at least, the writing is sloppy because they lost track of a character and never saw them again. In fact, the choices they made allowed the character in question to become a Karma Houdini, but different choices would've ended in that character being more important and getting an on-screen resolution (of which there are many possibilities, ranging from friendship to backup to Heel–Face Turn to execution.) The drawback to this complexity is that if you want to rig the game for a certain, preferred outcome, you're probably going to have to consult a FAQ.
  • The Inazuma Eleven series shows plenty of signs of this:
    • Inazuma Eleven 3, and possibly previous games in the series, have a special shoot animation which is only played if the defending team has no available players (not even the goalkeeper) anywhere near the path from the ball/kicker to the goal. Odds are you can complete the entire game without this situation ever coming up, because the goalkeepers' AI isn't stupid.
    • Inazuma Eleven GO adds two more animations that only occur in highly improbable situations, where a player with an Avatar active either (a) fails to steal the ball from or (b) gets the ball stolen from them, by a player without an active avatar without using a hissatsu technique. Both of these are nearly (but not completely) impossible to pull off.
    • The Wii version also possesses animations for scoring an own goal (basically almost impossible to do by accident).
    • Every player who's about to use a hissatsu technique will use an individual grant to signal their intentions. Some even have alternate ones for very specific situations, such as Hiroto using a shoot hissatsu when Endou is the opposite team's goalkeeper. Not only does every character has their own voice lines for scoring (even those who will most likely never play offense, like the keepers), but also voice lines for shooting, goalkeeping, defending AND dribbling, even if they don't possess any hissatsu in that particular skill. Too bad the same can't be said for the announcer...
  • In Secret of Mana, there is a boss fight that is essentially a Zero-Effort Boss. However, if the player is wiped out in this fight (you do have to try to lose), the party is just kicked out of the area with Randi being revived.
  • Kingdom Hearts I:
    • If you complete Hollow Bastion before completing Monstro, Riku only says one thing in any of the cutscenes or help you during the first Parasite Cage fight. Riku only speaks one line before the second Parasite Cage fight, mocking Sora for not remembering his best friend. Sora calls him a liar, saying he's not the real Riku.
    • Similarly, it is possible to actually leave a few worlds before beating the bosses there - if you return, they get stronger, and any scenes with Maleficent will not play.
    • If one goes to Wonderland, leaves, then completes Deep Jungle first, the scene that normally shows Alice wandering into Hollow Bastion will instead show Snow White.
    • Normally, if you or one of your allies uses an item or defensive skill on another ally, they'll shout the name of whoever they're using it on. However, since the characters weren't introduced to each other before the first battle where all three party members fight at the same time, they'll say something like "Don't give up!" instead. This only happens during one fight in the entire game.
  • Kingdom Hearts II: The Cavern of Remembrance in Final Mix is split up into several platforming areas that require maxed out Growth abilities to proceed, with the last of these area necessitating Glide (obtained from leveling up Final Form). If the player cheats to get Glide before beating Roxas (the trigger that allows access to Final Form) and goes to the end of the Glide room, they will find an invisible wall that prevents passage into the last part of the Cavern until Roxas is defeated.
  • In Tales of the Abyss, Luke cuts his previously long hair short midway through the game. His unlockable costumes all have him with his newly cut short hairstyle. If the player starts a New Game+, inherits Titles and puts Luke in one of his costumes, said costume will have short hair, even though Luke hasn't even cut it yet. If Luke is wearing said costumes, Guy and Tear will point out his different hairstyle, with Luke telling Guy that "it's an expensive wig." Tear even points out that Luke "took off his wig to cut his hair" if he's still wearing an alternate costume when the scene actually comes up.
  • Tales of Graces:
    • Most characters have certain moves and such that they only get later on and have quotes for in the Future arc, but have different phrases for when they're used in the game's main storyline. For example, Asbel's Super Mode and its resultant Limit Break move are only available in the game's future arc and he mentions teaming up with Lambda during said Limit Break. If the player, on New Game+, carries the titles that unlock said super mode and Limit break to the game's main arc, Asbel's phrase will be different.
    • Not only does Asbel get a new Mystic Arte cut-in in the Future arc, but his skit portraits and status screen image now reflect his heterochromia.
    • Richard can also carry over his stronger Mystic Artes over to the brief part of the main arc where he's playable and still a Prince. While normally said moves have him reference being a king, they'll change when used during his brief playable appearance.
    • If Malik uses his Eternal Serenade Mystic Arte on the main arc's final boss, he declares it the last time he'll use said move. Yet, the player can still use Eternal Serenade in the Future Arc. If this happens, Sophie will call Malik out on his lie, forcing him to lie again to get Sophie off his back.
  • Tales of Xillia 2:
    • If you do the New Game+ glitch, the alternate Milla has access to the Special skill and a mystic arte. However, while she has the same cut-in picture as the real Milla, her casting during the mystic arte is different. Same goes for her linked mystic artes with Ludger and Jude.
    • If the player unlocks the previous game's outfit for one of the characters and equips it, their status image changes to the one from the previous game.
    • Think you can circumvent the 'travel restriction' from your unpaid Debt by walking to the next city? You can't.
  • The PS3 rerelease of Tales of Symphonia has two different Mystic Arte cut-ins for Kratos depending on what costume he's wearing when he performs it.
  • In TaskMaker, a player may choose to play a tutorial level to familiarize themself with the game. Said tutorial does not feature any monsters, and the only NPCs are shopkeepers with whom the player cannot make physical contact outside cheating. There is virtually no way to actually die from losing health in the Tutorial, unless you a.) repeatedly run into a wall until it grinds at your health, or b.) get especially lucky with a hidden spell that might summon a monster. And even then, you will not die in the Tutorial should your health hit 0 — the game will just say that you would have died under normal circumstances, and reset your health bar to full.
    • There's a hidden spell that can be used to summon a ship any time the player is facing water. However, said spell will not work in Castle Hall, because doing so in the right place would allow access to a very powerful weapon early on in the game.
  • And in the game's sequel, The Tomb of the TaskMaker
    • Certain doors are adjacent to walls with shapes on them (spades, polygon, heart, etc.), and said doors cannot be opened unless you have the key with the corresponding shape on it. While doors can normally be phased through with an Ethereal Potion, the game will tell you that, even if you're ethereal, you still need the key to get through that particular door.
  • The Logomancer:
    • The steps of many quests can be done out of "normal" order, such as solving a problem before finding the quest giver, but everything will work out fine and you'll just get some Easter Egg dialogue for your trouble.
    • Trying to investigate the rooms in the inn without talking to the clerk and finding out which room is yours will result in an Easter Egg where Ardus points out it's rude of him to go barging into a room he doesn't know is his.
  • EarthBound gives you a bike early on in the game, which is only usable when Ness is the only member of your party. In the Playable Epilogue, if you get the bike out of storage (because, guaranteed, that's where you put it), and go riding around in the swamp, a unique sound will play when you pedal through the marshes that can't be heard anywhere else in the game.
  • Shin Megami Tensei IV:
    • The Terminal Guardian, a recurring enemy that you encounter guarding each one of Tokyo's Terminals, as well as the Terminals in the final dungeons. His disguise depends on where you fight him, and the demon(s) he summons depends on how many times you've encountered him so far. His dialogue will always match his current disguise-demon combination, even unlikely combinations such as encountering him for the first time in his "Intuitive Man" disguise (which he wears in the final dungeons). What's more, every single one of his lines is fully-voiced. A comprehensive dump of his dialogue can be found here.
    • The skill Estoma Sword normally stops all encounters on the World Map and also banishes enemies that you strike with your weapon in a dungeon if their level is lower than the player character's level. It does not work on Challenge Quest enemies, ensuring that you have to fight them even if you have the level advantage.
  • Persona 3: The protagonist has Calling Your Attacks voice clips for all the party members' Personas, even though he can only use them through hacking. The two navigators even have voiced dialogue reacting to the player using a cheating device.
  • In Phantasy Star III, if you buy as escapipe at the start of the game (which requires selling your starting gear) and use it when the king throws you in jail, it breaks the game's sequence, making it Unwinnable. If you talk to the king after this, he commends you on using the item, but tells you to reset.
  • In Lufia & The Fortress of Doom, at one point in the storyline you learn that an unknown villain has stolen the key to the exit of the "Tower of Light", which you need to progress. It's possible to reach the Tower of Light as soon as you get the ship, long before the game requires you to and hence before the key is stolen. Should you reach the top of the Tower before the plot requires you to, the boss will not be present and the chest that the key is normally stored in will give you a Might Helm, the game's strongest headgear normally only obtainable as a Rare Random Drop.
  • Lufia: Curse of the Sinistrals:
    • The Tanbel Abandoned Mine serves as an introduction to Tia's Hook Shot ability. One section has her explain how to grab items from across crevices; it's possible to snag the key without approaching close enough to trigger the tutorial scene, which leads to Tia commenting on how Maxim already knew how her Hook Shot works. A later scene requires Tia to grab a box you passed by earlier in order to reach a higher ledge. If you threw the box away from its initial position, Tia will tell Maxim to look, the camera will zoom in on its original place...and Maxim will comment that nothing is there. The game even acknowledges whether it was Maxim or Tia who moved the box.
    • When you obtain the Legendary Sword from Soma Temple as a request from Parcelyte's president, you can choose to sell the sword. The obvious choice is Rochy since he pays the most, but there is unique dialogue for selling the sword in the Parcelyte guild shop or even in Tia's shop in Elcid.
  • In Super Mario RPG, once Mallow reaches level 6 he gains an ability called "Psychopath" that allows him to reveal the HP and a silly "quote" of any enemy he uses it on. If you begin grinding for experience the second Mallow joins you it is possible to get Psychopath far earlier than usual. Anticipating this, all the early bosses are programmed with Psychopath quotes. Even the enemies who appear before Mallow joins have Psychopath quotes, in case you find a way to hack him into the earlier levels.
  • Paper Mario: The Thousand-Year Door is a game where you generally won't be expected to do more than about 15 damage in one turn. However, with certain setups, you can manage to deal more than 200 damage (the HP of the Bonus Boss) in a turn. The creators realized this and, in the case of two bosses where plot important events occur in the middle of the fight (specifically, the first fight with Doopliss and the first form of the Shadow Queen), made it so that the bosses would heal a specific amount of HP if you manage to get their health to 0 before the event happens.
  • Knights of the Old Republic II: The Sith Lords has one part wherein you must have a female party member wear a Stripperiffic outfit to dance for a Hutt. If the PC is female, then you have to do it, but if the PC is male, the Handmaiden will do it. If you are visibly Dark Sided and female, the PC will brainwash the Hutt to let her do it anyway. It's also possible to have recruited Visas Marr by this point, so naturally, a curious player may think to try bringing her (since the game will dismiss Kreia). Visas will outright refuse.
  • In Dragon Age II, one of Aveline's gifts is the Shield of the Knight Herself. You get different dialogue when you give it to her depending on what you did with her starting shield, which belonged to her husband right up until he died ten minutes in - if you put it in storage she'll complain about you passing it around, if you sold it she'll mournfully comment about "utility over sentiment".

    Simulation Game 
  • FreeSpace:
    • The first game came bundled with FRED (FReespace EDitor), the same development tool the designers used to create the main game's missions. They included a rather amusing response to one attempt at crashing the program. FRED has an autonaming feature: before the user gives a ship a unique name, it is given a generic name based on its class and how many ships have been placed already. It was discovered that attempting to trick FRED's autonamer by renaming a ship to the next ship name in line (for instance, naming a ship "Ulysses 2" and then placing a second Ulysses) would result in the new ship being autonamed "URA Moron 1". For those interested, renaming a ship the next ship in line and renaming a ship "URA Moron 1" results in the next ship being "URA Moron 2", and so on.
    • In the first mission of Freespace 2, if you don't jump out when the mission is complete, the ships you've been escorting will actually go through the docking procedure with the ship that you're told is coming in for them to dock with. You can watch several minutes of scripted sequence and dialog that pertains to absolutely nothing important.
    • When the second Sathanas juggernaut destroys the GVD Psamtik in the mission "Straight, No Chaser", the Sathanas will normally blow the Psamtik away in seconds. However, its beams aren't scripted, just flagged as allowed to fire at will. On the off-chance that they miss enough so that the Psamtik is not immediately obliterated (essentially requiring all but one beam in the first two volleys to miss), the ship's commander and allied command exchange increasingly panicked dialog as the damage starts to pile up. The commander even reports that their jump drive has been destroyed, so you won't wonder why the Psamtik doesn't just take advantage of its luck and retreat while still in one piece.
    • Similarly, at one point the first Sathanas attacks the GTD Phoenicia. Usually it just gets blown up in the first volley, but if it does survive, the captain basically says "Screw This, I'm Outta Here!" and jumps out. Mention of this is made in the debriefing.
    • The first time you encounter the Shivans, the weapons you're equipped with are not nearly powerful enough to do more than annoy the Shivan ships. The debriefing makes note that no Shivan ships have been destroyed at all, anywhere. If you do manage to administer a Death of a Thousand Cuts to the enemy and blow up one of their ships, the debriefing is altered so that Command congratulates you on proving the new enemy is not invincible.
    • Occurs very frequently throughout the series. There are numerous ships that can appear in multiple missions, but stop appearing if they are destroyed. Easy to miss since most of these are freighters and transports of no real importance. The most obvious example is the Actium and Lysander.
    • Fan-made expansions often do this too: Blue Planet has one mission where you lure a destroyer into a trap by disabling some lesser capital ships. The crews of these ships figure out what you're up to and try to warn the destroyer that it's a trap. Even if you destroy their Comm subsystem to prevent this, the ship's crew will manage to jury-rig an emergency transmitter to get the warning off anyway.
      • Also from Blue Planet, let's say you used cheats to win the Unwinnable by Design mission "Delenda Est". A Sathanas juggernaut called "Mr. Cuddles" will show up to kill you. If you manage to survive that, you get a special debriefing.
  • In The Sims 2, don't think you can get away with screwing around with the social worker if she shows up to take your kids. Most sadistic players who played the first Sims usually boxed the kid or the worker in a room with no doors or the like in order to prevent the kid from being taken away. Trying to pull the same trick off in the sequel? EA gets the last laugh since if the worker can't reach the kid after a certain amount of time, she will teleport the kid to her car!
    • Each expansion in The Sims 2 included big gameplay elements that would have to be accounted for in future expansions, leading to extra features that you would never see if you only had one or two installed.
      • In University, the college neighborhood has certain restrictions due to time passing differently and students being in their own separate age group with its own game mechanics, which all later expansions had to take into consideration. Students also have teenage voices, meaning the voice actors would have to record lines for all the things adults can do but teenagers cannot.
      • Nightlife introduced a new aspiration, (Pleasure), which would need to have wants and fears assigned to it in all later expansions.
      • Open For Business allows players to run their own business, meaning all community lot items in future expansions (such as food stands and pet shops) would need to work when controlled by the player.
      • Pets cheated a bit; cats and dogs aren't permitted at university, and they can't be taken on vacation. Still, though, they can interact with objects only included in previous and future expansions.
      • Free Time's hobby system assigns an appropriate hobby to almost EVERY SINGLE OBJECT IN ALL EXPANSIONS.
    • Don't think you can cheat in the DS version without consequence. Setting back your DS's clock will cause the concierge to accuse you of being a time-traveling witch and aliens will swarm the town. There is no consequence for setting your DS clock forward, other than causing bugs to occur more frequently.
    • Sims with an Outgoing personality sometimes pull out a hand mirror and primp as an Idle Action. If the player has Nightlife installed and the Outgoing Sim becomes a vampire, the Sim will look into the mirror, sneer at it, and hiss. (You know, because vampires don't show up in mirrors.)
  • Harvest Moon
    • Many games within the series have events based on your friendship with certain people. Some of the events involve characters who are in the pool of potential Love Interests; some of the events must be seen if you want to marry them, but some of them are optional. If you see these optional events after you've married them, the dialogue will often be slightly different — in addition to calling you by your nickname, they'll say somewhat different things.
    • In HM DS, if your Ball item gets lost, Mayor Thomas will return it to you. Your ball can get lost if you so much as sneeze (though you can purposefully ship it or give it to people), but if you specifically throw your ball in the water? Thomas will appear angry and dripping wet, and chide you for being so irresponsible! If he wasn't a champion swimmer, your ball would be lost for good.
    • When you want to propose to someone, you need to use the Blue Feather, an item that you usually get only once per game. If you show it to an eligible partner, then they'll either agree to marry you or not. If you show it to the other townspeople, then you can get a unique response from EVERY other character in the game, ranging from congratulations on your upcoming engagement, to mistakenly thinking that you're trying to propose to them! This is taken even further in Island of Happiness. There are around 70 extra side villagers that can move to your island. Even though they don't have face graphics, and are all simple Palette Swaps of each other, they'll each have their own special response to the Blue Feather!
  • In Evil Genius, secret service agents usually infiltrate the rooms of your underground base via doors, and given enough time, they will hack any door. If they find something incriminating or vital, they'll try to blow it up or take pictures for evidence. If you try and block off incriminating evidence, agents that get close enough will start shooting whatever is in the way, leading to explosions and fires. If you're foolish enough to build a room then brick up the entrance, agents will find (read: make on the spot) secret entrances into the sealed-off portion of your base and carry on with their despicable do-gooding while you are helpless to stop them because the entrance is bricked up. This also works in reverse — locking up an agent into a bricked-up cell only leads to him using another secret passage to get out, and he could end up smack dab in the middle of your power plant. FFFFFFF----
  • In MechWarrior 2 several missions required you to navigate a sprawling city full of civilian buildings. The missions didn't require you to deviate much from the predisposed path, but many curious players did it anyway because all the buildings could be inspected to reveal what was inside (and destroyed with no consequences, if the urge struck you). That they were all believably labeled (offices, hospitals etc.) showed a fair amount of Thinking of Everything all by itself, but at some point - way away from the mission's objective - you'd find a building labeled "Oh, just a building" that, when inspected, showed "Don't shoot me!". If you blew that up, a nuclear explosion would happen that'd destroy the entire level and everything in it.

    Stealth Based Game 
  • Hitman:
    • Blood Money anticipated for "Til Death Do Us Part" that people might disguise themselves as a priest during a wedding. So naturally, there's a bonus cutscene where you can tie the knot for your target.
    • Running near the jogger in the suburban mission "A New Life" results in him saying, "Nice stride, friend, but you'll ruin your feet in those shoes!"
  • In Splinter Cell: Conviction, the new, improved takedowns include slamming a hostage's head against the wall. If you do this in front of a light switch, the Player Character slams the hostage's face into it. This turns the lights off.
  • Dishonored:
    • The introductory level features a character whose portrait is being painted. Near said character is an item of small monetary value. Much later in the game, the painting is visible in a room; if the protagonist stole the item during the intro, it won't be visible in the painting either, and a character will complain about its absence.
    • If ever get seen by guards or important people while playing the game, you will find wanted posters with your (masked) face. However, if you go through the game without being spotted once, the wanted posters you find will simply have a silhouette with a question mark in it. For even more detail, if you get spotted after these posters go up, they will be replaced with posters with your face.
    • Multiple levels have shrines where the player can have brief encounters with The Outsider. In most of these encounters, he'll offer his thoughts on your current objective, usually describing the person you're on your way to kill. If you avoid the shrine, complete the objective, then backtrack, the Outsider's dialogue changes to reflect it. He even recognizes whether you killed the target or took the non-lethal option.

    Strategy 
  • Fire Emblem:
    • List of characters that can be hacked into Fire Emblem: Path Of Radiance. The fact that one of these characters shares a name with a character from Radiant Dawn is probably just a coincidence, as the two have different classes. The fact that Zelgius and the Black Knight have the exact same affinity, weapon ranks, and growth rate? Not so much. Yes, Developers' Foresight includes putting in spoilers for the sequel.
    • The dev team didn't get sloppy in the sequel, either, as they included many scenes of dialogue which are incredibly hard to see, like characters on opposing armies having a unique conversation before they battle where it's incredibly hard to get them to fight (like Micaiah and Soren, where the former cannot cross a specific line which she must defend and the latter is an NPC which rarely moves) and the Black Knight having a unique death quote if he dies on the chapter where you control him and none of the enemies can kill him.
    • In Path of Radiance, you get a lot of variance in scenes depending on whether or not certain characters died. (Even some Support Conversations change to reflect who's alive and who isn't, most notable being Makalov and Astrid)
    • If you have Ike fight the Black Knight when he appears in Chapter 11 (he's unbeatable at this point) and Ike somehow survives, you get a few extra lines at the end of the chapter where Mist gives Ike an Anger Born of Worry-fueled What the Hell, Hero?.
    • In Rekka no Ken's penultimate level, The Value Of Life (32x in Hector's Story, isn't in Eliwood's), the mission is to kill the Magic Seal Kishuna, whose chamber is closed off by a door and who summons reinforcements when said door is opened. Using the Warp Staff to send a unit into Kishuna's room on turn 1? Not such a great idea, or if you do, you'd better be prepared to go right after him rather than wasting time so your other units can pick up the treasures in the level. Sending a unit to the space directly above the door while it is still closed causes it to not only open on its own, but four Berserkers that wouldn't otherwise be in the level show up as reinforcements. note 
    • In Fire Emblem Awakening, if you play as a female Avatar, Lon'qu may not appear in the barracks very often. He's extremely nervous around women, and may only start appearing regularly after you marry him.
    • In some Fire Emblem titles, there are levels in which there is a door which opens automatically after a specific number of turns, usually by an NPC. Under normal circumstances at the points in the game which they occur, it is effectively impossible to get to the door before it automatically opens. However, if the player somehow manages to reach the door and open it themselves, an otherwise inaccessible cutscene is displayed to accommodate the situation. Chapter 16 in Rekka no Ken is an example of this.
    • At the end of the prologue in Shadow Dragon, you must choose a unit to use as a sacrificial decoy so that the rest may escape. It is possible to choose Marth, even though the decoy will be Killed Off for Real and Marth dying ends the game. There is a specific cutscene for this scenario.
    • There have been a few occasions in which a boss who you are not supposed to beat actually has dialogue or a situation on what happens if you do manage to beat them:
      • In Genealogy of the Holy War, the Final Boss appears on a map at a time far before you're supposed to be able to beat him. If you somehow can, he'll laugh it off and leave the battlefield, tossing a snarky remark of "Playtime is over — I'm going home." over his shoulder.
      • You are told not to kill Fargus in Rekka no Ken. However, you actually can attack him (Which isn't recommended, seeing how powerful he is) and the game takes into consideration what happens if you do attack him — you get a Game Over.
      • In Radiant Dawn, one chapter has Lekain on the map. While he is supposed to flee when someone shows up, you actually can get over to him and beat him, causing a scene to play where he retreats.
    • In Fire Emblem Awakening, Chrom and Lucina's Falcions are both usable by Spotpass and DLC Marth. It was originally his sword, after all.
    • Chrom's promoted class' battle model uses the Fire Emblem as a shield within Fire Emblem Awakening. The Fire Emblem is first given to him in Chapter 7, but if you manage to do a ton of Level Grinding and get Chrom promoted before then, the shield won't appear on his model until he receives it in the story. And when the shield is taken in a story event later, it will also disappear from his model.
    • In Owain's supports with his father, he eventually reveals that his father died in a Heroic Sacrifice to save him in the Bad Future he comes from. This backstory is the same for nearly all of his potential fathers, except a Male Avatar as this obviously couldn't have happened: the Avatar got possessed by Grima and caused said Bad Future. In this case, the support is altered to Owain mentioning that his father was heavily wounded and he never saw him again.
    • Validar in Chapter 23 of Awakening is behind a barrier, preventing anyone in your army other than Chrom and the Avatar from reaching him. He has special boss quotes for both of them, so you normally won't get to see his "generic" boss quote, but he does have one: the only way to see it is to use the long-range tome Mire. (The line also seems to be subtly referencing the fact that you're not fighting him the intended way)
    Validar: Destiny is your master, one way or the other!
    • There is a surprising amount of this in Fire Emblem Fates:
      • Caeldori is an Expy of Cordelia from Awakening. Normally, all parents have unmodified supports with their children, but if Selena is Caeldori's mother, then the supports actually will change to reflect this, as Selena is in fact Cordelia's daughter. An additional line plays at her recruitment chapter demonstrating this.
      • The Before Awakening DLC map takes place literally before Awakening. If you deploy Odin, Selena, or Lazlow on this map, they can actually speak to Chrom and Lissa. Similarly, Lissa will also respond to Ophelia, her granddaughter if you have her on the map, and Chrom will respond to Caeldori, who is a dead-ringer for Cordelia. The other two Expies of Awakening characters, Rhajat and Asugi, actually don't get a response from Chrom... since the characters they are expies of haven't actually met Chrom yet.
      • One of the big things about Conquest is that you have limited ways to gain experience. If you attempt to Arena-abuse, you actually don't get experience at all, and if you attempt to DLC-abuse then you don't get experience either. (Does not apply to the Boo Camp experience map though)
      • If you are playing Phoenix Mode and your characters undergo Clothing Damage, then their models will not only keep the Clothing Damage but it may even follow over to cutscenes.
      • The Avatar teases Leo for having his collar inside out in Chapter One. If you look, you can see that it actually is inside out on his model.
      • If you manage to rush to Takumi on Chapter 10 of Conquest before he uses the dragon vein against you, then he actually won't do it anyway. In fact, there is dialogue for this.
      • Garon appears on Chapter 12 of Birthright. It's pretty clear that he is not supposed to be approached since the objective is for the Avatar to escape. If you actually do attack and defeat him, there are lines for this.
      • The battle backgrounds as well. Not only will the ground and walls match the tileset used, but it will match surrounding landmarks (such as trees, walls, nearby buildings) and even showcase nearby hazards such as barriers or broken walls. If you are fighting in a cramped hallway or an alley, the camera will give you a shot from above since the "Default" view would place the camera in the middle of the wall. Looking at the transitions, you can even make out where specifically from it zooming in.
  • If you use an Action Replay to boost the experience gained in Disgaea DS, the game will adapt the characters leveled up in this fashion so that they need to more than double their total EXP gained just to go up one more level — essentially forcing you to keep using that cheat just to level up at the normal rate. Of course, by the time it figures it out (which varies from character to character), you could already have your characters' levels in the 4000s (usually, it figures it out by around 2300 or so).
  • Super Robot Wars OG:
    • The games have sets of dialog for any character piloting any mech (except in cases where characters have their own specific, exclusive one), occasionally with some humorous results.
    • Additionally, an early scenario in OG2 has the player, with only four units, being ambushed by three boss units. However, with persistence, a player CAN beat them, resulting in a Breaking the Fourth Wall moment and rewarding the player with various powerful items.
    • If players inputted the same cheat code from Super Robot Wars EX that lets players use the Neo Granzon right off the bat in Dark Prison, then some of the conversations and scenes will change. This does come with the consequence of not witnessing the Granzon's awesome transition into the Neo Granzon.
  • Super Robot Wars Z has many such instances. For example, The Big O is a ground unit which has melee attacks which do not work against aerial opponents, but if you attach a "Minovsky Drive" which allows it to fly and use these attacks, you see that they have specialized, completely unique animations for mid-air use. Another one is an Easter Egg special dialog that can be found if you reduce the penultimate boss' HP to exactly 1 point, where it goes on a rather lengthy rambling session. Lampshades the whole idea with the ground-only Iron Gear (WM)'s punch attack — if it's given some way to attack aerial foes, it won't use its boosters to jump up. Rather, it just kinda floats up, perfectly in key with its source.
  • It's possible, with a lot of time, care, and planning ahead, to run out of fuel on every unit during the first campaign mission in Advance Wars 2 - doing this causes Nell to yell at you and tell you to Yield so you can start over.
  • Fanmade BattleTech translation Megamek allows some of the various vanishingly small opportunities in the native wargame to occur, including a Mutual Kill (which is difficult since rarely will two sides simultaneously and completely destroy one another). When it happens though, it is able to not only recognize the fact that both sides lost, but announce that the winner is "the Chicago Cubs!!!".
  • Hearthstone:
    • The game has many examples of this, but perhaps the best example is the Noble Sacrifice card. This Paladin-only card triggers when an enemy directly attacks the hero, and it summons a 2/1 minion which redirects the attack to itself. Normally, this would kill it outright, but if other triggered effects cascade off the Noble Sacrifice entering play, the original attacker can potentially die first. The best part? Each minion has a one-liner they deliver when attacking, and the Noble Sacrifice sounds very surprised to be alive.
    • Adventure mode bosses have several minions that are unobtainable to players, but can be controlled through cards like Mind Control. These unique minions also have attack quotes, with many of them sounding quite disdainful/surprised that they are being used by the player.
  • Starcraft2, in one of the Ultralisk advancement missions. You're rampaging through the city with an army of Ultralisks, and at some point you come across a lonely parked car close to a building, of no relevance whatsoever. If you destroy it its owner will come out of his home, yell at you for doing it right after he'd finished paying for it, and open fire.
  • In Galactic Civilizations II, there is a specific endgame screen that triggers only if you deliberately supernova your last inhabited star system.
    Worker Salaries: 4500 bc
    Raw Materials: 125,000 bc
    Propulsion System and Fuel: 5500 bc
    Death Beam: 10,000 bc
    Blowing up your own homeworld with a Terror Star: priceless.
  • Yu-Gi-Oh! Capsule Monster Coliseum has many variables taken into account when dialogue appears, such as which side is winning, how many monsters each side has summoned, whether or not you're idle, whether or not one side is making a comeback, and how the match ends. Each factor has several quotes associated with it, and some may lead to conversations.
  • In Hard West, the only available weapons in the game are firearms, there are no fistfight mechanics. What happens if you enter a tactical encounter with a character who doesn't have any weapon equipped? He receives a special gun named the "Rusty Peashooter", which is a sixshooter revolver inflicting 1 point of damage per shot.

    Survival Horror 
  • In FEAR 2, you start the game in a parking lot. If you shoot at a nearby car for the heck of it, your squadmate tells you to stop ("hey, it's not your car!"). A short while later, you meet with your superior, who asks why you're late; your squadmate says "Becket was busy vandalizing shit". He has different responses if you jump in the fountain ("Becket decided to take a bath in the fountain") or just take a long time doing nothing ("Becket was busy admiring the scenery").
  • Call of Cthulhu: Dark Corners of the Earth: There's a moment where Jack needs to access a ladder locked on a ceiling by shooting its lock. Doing it under the ladder makes it fall on Jack and badly injure him.
  • The final stalker in his second form in Haunting Ground can't be hidden from under normal circumstances. If you possess a special item that makes you invisible, however, and manage to tuck yourself away in the one corner out of his line of sight long enough to give yourself time for that invisibility to activate, he will still have unique lines recorded suggesting you're hiding from him.
  • If you find a glitch and fall outside the boundaries of the level in Slender: The Arrival you die and text from Slenderman appears at the bottom of the screen saying "even a glitch in the game can't save you from me."
  • In the Old Clockworks area in Luigi's Mansion: Dark Moon, one room features a key guarded by two Slammers...only both of them are too distracted to notice Luigi. Most players would just capture the two ghosts and then grab the key, but if you instead opt to sneak past them, grab the key, and then leave without them noticing, they'll suddenly realize the key is gone and start looking around for it.

    Third Person Shooter 
  • Max Payne 2:
    • The first non-prologue area involves the investigation of a warehouse area. One of the private cleaners of the site insists on letting you in and showing you to the main storage area, at which point he and several of his underlings ambush you and the real violence begins. Unless, of course, you already know what's going to happen. You can simply kill him upon your first encounter, causing the monologuing protagonist to say 'The perp's disguise didn't fool me, he was leading me into a trap' instead.
    • Any stage that allows you to roam around in one way or another supplies you with many little sweets, some dialogue, and some actual animations:
      • In Payne's or Corcoran's apartment complexes during their respective shootouts, if you knock or try to open any other apartment doors that you aren't supposed to, people inside will call out to you things along the lines of "Get lost!", "The cops are on their way!", and "Ooooh, ooooh yeah!", thus averting the mistake other games usually commit.
      • There is a man making a statement within the police station on how his wife and her lover killed themselves in his house and THEN framed him for the murder or the stripper who receives threats from her video shooter-addicted boyfriend after she threw his TV out of the window.
      • Then there are several areas you will probably never have to go during the game, such as the traffic control centre and the recreation room. In the former, you can listen to the officer in charge giving directions and confirming orders, but in the latter, you see two cops watching TV. If you get between them and the TV, they will shout at you to get out of the way and try to lean around you. If you actually turn off the TV, they will call you an asshole and turn it on again with a remote. If you try to fiddle with the air conditioner that has a large white paper with "DO NOT TOUCH" on it, it'll break and they'll call you out on it for that as well, complaining about Indian summers.
      • At one point during the Escort Mission where you have to protect Vinnie trapped in a bomb-rigged Captain BaseBallBat-Boy costume, you enter Vinnie's flat, and you can shoot Vinnie's collector merchandise, who will then call you out on shooting his "priceless collector's items".
      • In the third game, Max can carry one large rifle or shotgun and two smaller weapons. Max will realistically carry his longarm in his off hand due to the lack of a sling, even during cutscenes. And if Max needs to go Guns Akimbo, he has to drop the long gun. The game even edits cutscenes to take account of whether or not Max entered the scene carrying a rifle and has to put it down or have it taken.
  • Red Dead Redemption:
    • You can jump off from a second-story balcony or window onto your horse and ride it out of town.
    • There is an achievement for dropping a hog-tied woman in the way of a train.
    • John (and subsequently Jack) has multiple unique battle taunts for each of the twenty (and completely optional) bounty targets. Jack also has a full set of dialog recorded for each Stranger mission if you wait until the endgame to complete them. The one exception to this is I Know You. If you somehow manage to not do this mission before John dies, it won't count against getting a 100% Completion achievement/trophy.
  • Spec Ops: The Line has unique voice lines when you use squad commands, depending on where the enemies are. Order a flashbang on a bunch of enemies hiding in a bus, and Walker will say "Empty that bus!" In a shootout in a museum with a T-Rex skeleton, he'll say "Take out that guy by the T-Rex!" Your allies will also shout out enemy locations in the same way.
  • Chapter 3 of Kid Icarus: Uprising revolves around Pit fighting a three-headed dragon and chasing its disembodied heads. The order you take out its heads determines which "role" each of the heads will play in the land portion of the chapter, and each head has unique dialogue for each "role".
  • Transformers: Fall of Cybertron:
    • While playing as Starscream the player can find a crown and have him wear it for the rest of the level as an Easter Egg. During a cutscene towards the end of the level, Starscream gets thrown into a wall and knocked out by Grimlock before player control switches to Grimlock; if Starscream is still wearing the crown at this point, it gets knocked off by Grimlock's throw and accidentally crushed when Grimlock walks past.
    • Shortly after Grimlock gets loose, the various Decepticon guards will attack you... but the unarmed scientists and workers actually working at the facility will run away, duck for cover, or simply freeze up out of fear. Some of the guards will also choose to flee instead of fighting, as they know how much more dangerous you are.
    • Early in the game Optimus passes by Grimlock's quarters, where Warpath was just searching for him. If you go inside (which you have no reason to do and wouldn't probably think of, given there's an attack going on) and look at the morbid stuff he has in there (weapon racks, a locker filled with heads, etc.), than Optimus will make some weary comments about Grimlock's violent nature. You can also turn on the TV in the room and sit down to watch it; doing so gets you a nasty comment from Ironhide over your radio chewing you out for not getting to the battlefield when you're needed.
    • When Megatron confronts Starscream, a button prompt tells the player to press the fire button to "shut Starscream up". If you hold off on firing instead, a surprised Starscream proceeds to go into a lengthy rant about how he's the better leader of the Decepticons while waiting for you to shoot him. Similarly, if you linger a bit instead of walking away immediately after beating Kickback, he'll make fun of you for sticking around.
    • When you confront Shockwave as Grimlock, if you listen in on Shockwave and Megatron's conversation instead of attacking right away like the game expects, the two continue their fully scripted conversation and exchange some private information the player won't otherwise hear because the two think they're alone.

     Visual Novel 
  • In Virtue's Last Reward, in order to unlock the door in an escape section, you need to get a key from within a safe, by unlocking said safe with a password. All your passwords you find are stored in the file screen, and after you've completed an escape section, you can replay it by selecting it on the flow chart. If you replay one of them, you'll be able to automatically open the safe by entering the password, thus bypassing the puzzles. If you do so, then there'll be unique conversations when you go to leave the room, particularly if there is something within the room and it's puzzles relating to the plot. The same thing obviously happens if you happen to guess the password and input it without having found it. One particular example is in the lounge, where doing this will result in Phi stopping you from going through the door, and shouting a quick lecture on lunar eclipses at you, much to the confusion of protagonist Sigma.
  • Done In-Universe in Zero Time Dilemma, the sequel/prequel to the above. Team C attempts to use Akane's psychic powers to cheat the game by getting themselves killed in alternate timelines so that Akane, whose power is based around forseeing all possible future timelines, can discover the passwords obtained by killing Carlos and Junpei, and possibly the others. Unfortunately, Zero is Genre Savvy to the series' penchant towards Mental Time Travel, seeing as he is himself an Esper so ensured that the passwords were useless unless their designated victim was actually dead.
    • On a slightly more lighthearted example, the player can choose a number of options for different choices, including the nonsensical. For example, after finding Mira dead in one timeline Eric asks Q who killed her. Among the choices are Q, Eric and... Gab.
    • If the player knows Zero's identity, there are a few places where extra dialogue can be found. When typing in who killed Junpei, putting in Delta causes the game to say "HE IS NOT HERE". Typing it in during the Mexican Standoff leads to an Easter Egg ending where Q turns around and apologizes before shooting him, leading to surprised reactions from Eric and Mira.

     Wide Open Sandbox 
  • In Goat Simulator, you get an achievement for crashing the game, after you reload it of course.
  • Bully
    • English class requires you to play a mini-game where you must unscramble letters to form as many words as you can. One level includes the letters F, G, H, I, S, T. If you spell 'shit' using those four letters, it doesn't count, and the teacher just gives an amused response. The PAL version updated English class so players get the same "funny but it doesn't count" response for 'git.'
    • When protagonist Jimmy Hopkins dresses up as the Mascot, he can't interact with people normally, which includes kissing girls. However, if he goes into a couple specific cutscenes in which he gets kissed in the mascot outfit, the girls kiss the mascot headpiece on its' nose.
    • When Jimmy wears shorts or other clothing suited to warm temperatures during Chapter III, his idle animation will be of him shivering and hugging himself to keep warm.
  • The inFAMOUS franchise has a few:
    • In the first game, there's one final temptation for a heroic Cole to cross the Moral Event Horizon by detonating the ray sphere again. If you do this and you've garnered a good reputation, the civilians that attack you on the street will scream about how Cole betrayed them instead of the generic comments about his monstrosity, and the heroic posters you would have chosen to be plastered up will have all been crossed out, marked up, or had stickers with broken hearts put on them. It also works the other way around. If you chose not to despite having Evil Karma the people will start to question you and your Evil Posters will have a question mark over them.
    • Cole suffers from justified Super Drowning Skills because water causes him to short out. Even tiny puddles cause enough of a surge to One-Hit Kill most enemies up to and including minibosses, which can be used in certain situations to completely bypass tricky fights.
    • In inFAMOUS: Second Son, Delsin usually flashes an exhilarated grin as he's performing an Orbital Drop. When using it in the first battle against Augustine, right after she kills Reggie, the expression is one of pure, undiluted rage.

Non-video game examples:

    Anime And Manga 
  • A filler episode in the Davy Back Fight arc of One Piece has the Straw Hats playing Pirate Dodgeball against the Foxy Pirates. Pirate Dodgeball also has a massive rulebook with Obvious Rule Patches for seemingly everything (including accidentally swallowing the ball.)

    Literature 
  • Good Omens:
    [The ship's captain's] questing finger moved slowly down the page, and stopped. Good old International Codes. They'd been devised eighty years before, but the men in those days had really thought hard about the kind of perils that might possibly encountered on the deep. He picked up his pen and wrote down: 'XXXV QVVX'. Translated, it meant: 'Have found Lost Continent of Atlantis. High Priest has just won quoits contest.'
  • In Harry Potter, there exists an official rulebook filled with a list of hundreds of actions players are not allowed to take in a game of Quidditch, up to and including unauthorized use of badgers. The body in charge of this book prevents the public from seeing it to prevent players from getting any ideas.

    Live-Action Television 
  • Journey to the Center of Hawkthorne from the Community episode "Digital Estate Planning" features a few examples:
    • The player's avatar is based on a picture the game takes of the player. The AI can recognize when the player is the boss' illegitimate son.
    • The AI can recognize when the players are working together instead of competing with each other. The latter is how the game is supposed to be played.
    • The developers apparently prepared for the chance that a player would accidentally kill a shopkeeper...and decide to kill the rest of his family, loot his shop, and burn it down to cover all that up.

    Pinball 
  • On the vast majority of Pinball machines, if nothing seems to have happened on the playfield for a while and no flipper has been touched, the game reasons that the ball is stuck and starts randomly firing off all of the kickers and features on the table to attempt to unstick it. Some games also have quotes or special displays at this point (Fun House, for example, would say "Where did you go now?")
  • The pinball game Indiana Jones: The Pinball Adventure features a sinkhole chute that is guarded by three targets. Normally the sinkhole is accessable only when the targets are struck and dropped out of play, revealing access. Because pinball games are physical, it is possible to slip by without striking the targets. The character Short Round will cry out, "you cheat, Dr. Jones!" and awards bonus points. There is also a bonus section where you are supposed to hit various targets to fight against a swordsman displayed on the screen. However, if you remember that the ball launcher is designed like a gun trigger, you can indeed follow in Dr. Jones' footsteps and just shoot him.
  • The same could be done on The Shadow pinball machine, where you could make a pinball shot to defeat attacking Mongols, or just shoot them. This added a tactical dimension, as shooting the Mongol awarded far fewer points, but certain features were not accessible during the Mongol Attack, meaning that skipping it could avoid you being frozen out of the feature you actually wanted.
  • Williams Pinball machines were famous for their ability to detect when a physical part of the machine had failed and compensate for it by modifying the rules of the game. So if a sensor hadn't triggered for a while, the game would substitute another sensor along the same rail or shot. This was an incredibly useful feature for arcade owners, and the source of some annoyance that machines from other manufacturers didn't do this (this wasn't their fault, though - Williams patented it.)
  • The Addams Family
    • If a ball enters the Vault while the Bookcase barrier is still supposed to be blocking it, the game proceeds as if the vault had been opened. Gomez even compliments you about this:
      Gomez: Dirty pool, old man. I LIKE it!
    • The game lets you lock balls in one of three shots. One of them is the swamp. You reach the swamp if you launch a ball too weakly. The game takes notice if you lock the ball from the launch lane.
      Gomez: Good thinking!
  • Funhouse:
    • Rudy's mouth is normally only a valid shot when it is locked open as he's asleep, but incidentally shooting the ball into his mouth while he's speaking causes him to swallow it and spit it out, scoring a "Rudy Gulp". In the similar table Road Show, which featured two talking heads named Red and Ted, shooting the ball into Red's mouth while she's speaking will make her spit it out, shouting "You big cheeseburger!".
    • Additionally, the table's standard multiball mode requires locking two balls, then shooting a ball into Rudy's mouth while he's asleep. However, there's also a "Quick Multiball" award that, when activated with both balls locked, will start the standard multiball mode having to directly hit Rudy — and it will reward a million points each time Rudy gets hit in addition to the multi-million-point trap door shot.
      Rudy: What was THAT?!
  • In White Water, if the player shoots the ball weakly around the orbit, causing it to roll backwards through the No Way Out lock mechanism and back onto the lower playfield, Willie shouts "You found the secret passage!" and a bonus is awarded.
  • On Star Trek: The Next Generation, if you drained a ball or timed out during a Mission Mode without scoring points, you would get a minimum point bonus while hearing Data say, "Had you propelled the ball along the proper trajectory, you would have been rewarded."
    • If you hit the flipper buttons while Data speaks, an annoyed Picard will cut him off.
      Picard:Thank you, Mr. Data
  • In Cirqus Voltaire, if the ball falls into the Highwire lock from a weak ramp shot without being lit, you are awarded a "Sneaky Lock" bonus (with an animation of a pinball tip-toeing across the display), and that ball is locked.
  • Theater Of Magic has a hole under the trunk to lock balls in the center of a loop. Normally, diverters to the holes are down until lock is lit, but it's still possible to shoot the loop lightly so that the ball stops mid-loop and falls in the hole. Doing this will trigger a special animation where a magician falls down the stairs into the Haunted Basement: "Oooohhh Noooooo! Ow oof aak oof ack! This ball is full of wonders!" and allow you to lock balls without spelling "Magic". In a double case of developers' foresight, doing this a second time in the same game will only award some points.
  • A Death Save is a pinball maneuver where, after the ball falls down an outlane, the player whacks the machine in order to bounce the ball back into play from below the flippers. Most Data East tables detect this move and give points for it.
  • A highly frowned-upon technique in pinball is called a "Bang Back," where a player strikes the machine's front or underside to force a ball back into play as it's going down the drain. Allegedly, some early pinball companies would discourage this by placing downward-facing nails or spikes on the underside of the cabinet under the drain to injure anyone trying to cheat this way.

    Operating Systems 
  • The Windows CE emulator in Virtual PC was clearly programmed by someone who understands bored techie tendencies. Attempting to set up a recursive emulation results in an error with the text "You just had to try, didn't you?" This may be considered erroneous behavior, since it means the emulator doesn't perfectly recreate the environment, but on the other hand, dicking around with recursion is pretty erroneous to begin with.
  • The Unix cal command prints calendars. If you type cal 9 1752 you get the calendar for September 1752. The 14th follows the 2nd because England converted from the Julian to the Gregorian calendar at that time.

    Sports 
  • In Chessboxing there are rules for how to handle a match runs out of times before either fighter wins. As in boxing, the fighter ahead on points in the boxing match wins. This trope comes in, however, in a situation that The Other Wiki says has never happened: if the points in the boxing match are tied and the chess match ends in a draw, the person playing black wins.
  • In many sports there are (sometimes extremely detailed) rules for what happens when a player is injured, feigns injury, bleeds or is otherwise incapacitated. The fact that these rules exist might get you thinking about the game. Particularly detailed rules exist in Rugby and American Football, but the rules on bleeding soccer players are also a bit too detailed for comfort.

    Tabletop Games 
  • Vampire: The Requiem:
    • In the previous incarnation of the game, some Disciplines were notoriously easy to ignore. To hammer home that this iteration is more ruthless and harder to cheese, the developers state that that using the Dominate Discipline always requires eye contact, and if a character were to try to ignore this rule by wearing sunglasses, said Ventrue player is free to laugh at the n00b's incompetence.
    • V20 backports these rules to Vampire: The Masquerade, and further notes that since the need for eye contact is symbolic rather than literal, even removing your eyes doesn't render you immune to eye contact — it just makes it much easier to avoid it.
    • On a more practical note, the dev team was kind enough to supply the likely effects massive pressure differences would have on vampires. In space.
    • The 'Armory' books list (among numerous other Improvised Weapons), the effects when using a belt sander or post-hole digger as weapons.
    • In the old World of Darkness, a rulebook gave the stats for using a chainsaw as a weapon. Not so unusual, except it also included the moral and psychological repercussions of using a chainsaw on another flesh-and-blood person.
  • The number of unusual and obviously dangerous substances that the Dungeons & Dragons writers stat out the effects of touching, eating, drinking, or doing something borderline suicidal with approaches the infinite.
  • The point of the conditional modifiers in Hoyle's Rules of Dragon Poker. If it could conceivably happen, there's probably a rule change for it. Notable examples include the end of the world, UFO encounters, and the Detroit Lions winning the Super Bowl.
  • Psionics: The Next Stage in Human Evolution:
    • Are you trying to melt a metal door? There’s a table of melting points in the book.
    • There are rules for scoring drugs, including additional difficulty modifiers based on what the player is trying to get.
    • The book also provides role playing cues for players who have taken drugs, including the ones that don't exist in real life.
    • There are strict addiction thresholds and rules for the effects of overdosing and addiction.
    • Did you run someone over with a car? The damage done is included in the book. Were you standing too close to a car that exploded? That damage is also in the book. Did you just hit someone with a car that you telekinetically threw? That damage is also in the book.

    Toys 
  • Transformers toys:
    • Omega Supreme's toy in Transformers Energon has three parts: A giant battleship, a huge train, and a small robot which formed the head. When in combined mode, Omega Supreme's body (Made of the crane and the battleship) have a head of sorts that can be raised when the actual head unit isn't attached. Reason? To actually give the big guy a head if one loses the head robot.
    • The same with Armada Sideways. His small "mini-con" partners turn into his head, one for his Autobot form and one for his Decepticon form. However, he has a pop-up head in his own color scheme just in case you lose both the mini-cons.
  • Leap Frog's Alphabet Pal is a caterpillar that teaches kids the alphabet. One of the settings is to have her say the sounds of each letter. In early versions, pressing 'F' followed quickly by 'C' or 'K' would cause it to say "fuck". Leapfrog realized this and released a later version, in which trying to do this results in it giggling and saying "That tickles!" before saying the sound.

    Web Animation 
  • There is a Strong Bad Email in which Strong Bad buys a new comfortable chair to check his emails with, but the chair itself is huge and covers up most of the computer screen. Strong Bad proceeds to respond to an email by taking off his wrestling mask and showing a picture of his parents on the computer screen, but both are obscured by the chair. If one attempts to use a flash decompiler to remove the chair, Strong Bad's head will be missing and the picture will have the message "nice try dodongo!" on it.

    Web Comics 
  • xkcd had an interesting April Fool's day in 2010, which can be found here. It has responses to several unlikely things:
    • Type in a certain four letter word. The response? I have a headache.
    • Try entering 'Help', 'Sleep', 'Kill' or 'Destroy!!!'.
    • Or 'Next to Last'.
      • Followed by 'Enable time travel'.
    • 'Cheat', and of course, 'Quit'.
    • When you type 'look' you have exits of "West" and "South". Going "West" repeatedly will report interesting statements about each room you visit. It's the lyrics to the chorus of "Go West" by Pet Shop Boys.note  Hilarious. Going south will result in being eaten by a grue, unless you thought to type "light lamp" first.
    • And if you type 'go east' after going 'west' once, you get: "You are at a computer using unixkcd." The same thing happens if you type 'look'.
    • Entering 'xyzzy' will respond "Nothing happens", rather than a generic "must be roto".
    • Up, up, down, down, left, right, left, right...
    • Many real Unix commands are programmed in, such as "sudo." The site suggests using a few, including "cat", which just responds, "You're a kitty!" This comes from the one XKCD comic that named Cuteness Proximity.
    • Try "sudo rm -rf /". Similarly, ":(){ :|:& };:".
    • "find" also works; the game asks you what you want to find, and suggests "kitten." If you search for the aforementioned kitten, the console searches for the bizarre "game" Robot Finds Kitten.
    • "make love" results in the predictable "I put on my robe and wizard hat." This itself is a reference to the TOPS-10 operating system, which used the "make" command for the creation of a file. When "make love" was inputted, the OS would respond with "not war?" before creating the file.
    • Try "Make me a sandwich" and "sudo make me a sandwich".
    • "reboot" and "sudo reboot"
    • "go down"
    • "goto 10"
    • Try "Hello Joshua"
    • Try Vim or Emacs.
    • The response to trying to use nano is also quite amusing.
    • Try "xkcd", and then "unixkcd" multiple times.
  • 8-Bit Theater had an in-universe example with Black Mage attempting to copy a spell that Sarda used to rewrite reality according to his will, deducing it to be a "Rewrite Reality According to My Will" spell. It turns out to be a "Rewrite Reality According to Sarda's Will" spell instead.
    • In fact, Sarda casts all his spells this way, at least when he's around Black Mage. When BM copies an incredibly painful spell that Sarda has just used on him, he discovers that it's not a "make target vomit out his intestines" spell, it's a "make Black Mage vomit out his intestines" spell.
    • As Black Mage puts it: when Sarda casts a spell that hurts you, and you learn that spell, you learn to cast a spell that hurts you.
  • In Homestuck, Sburb has an insane number of ways that players can get their game back on track if things off the rails. Wayward Vagabond exists solely to help the players defeat the final boss if they screw up and aren't able to take him on. Act 6 reveals that a player who enters a game completely alone (something that renders Sburb completely dead and Unwinnable) still has a backdoor to a form of victory. It's also able to account for the players prototyping their sprites with anything. Including other sprites.

    Web Original 
  • Akinator knows pretty much every single person or character that anyone in the world even slightly cares about. It's not the developers, per se, but the contributions of millions of players that make up its nearly bottomless knowledge. He also catches onto your attempts to con him — try to click "No" every time and the answer will be "A PESSIMISTIC FELLOW", and his description "Someone who kept clicking on No to see what happens". He also knows a lot of non-characters, including "Yourself", "Your mum", "The Internet", "Xbox-360 controller" and "underwear". If the non-character hasn't already been added, he'll guess "Something I don't know because it's not a character". He also quickly guesses if you're trying to make him guess himself.
  • This webpage. Try using it to check itself.
  • Twitter has a 140 character limit. If you try and make a tweet with more characters and click at the nick of time, it will read "Your tweet was over 140 characters. You'll have to be more clever".
  • Is X a Prime Number? tells the viewer to stop wasting bandwidth whenever they look up an even number. Although "http://www.is.0.aprimenumber.com" just leads to the main site, it does have a unique message for zero, which can be found at "http://www.is.00.aprimenumber.com". Negative numbers will redirect you to the creator's main website, as will any string with an underscore in it. Finally, entering letters produces the message "I need a real number, yo."
  • Pokécheck is a website that, among other uses, can check the legitimacy of any Pokémon uploaded to it. It takes everything into account when checking to see whether or not a Pokémon was likely edited or created using an external device, across three whole generations of games and events. (as Gen VI hasn't been implemented yet as of 5/5/14) Obscure spin-offs and limited-distribution events? Taken into account. Differences between Gen III to V data-structures like garbage bits in nicknames that are preserved in the transition between generations? Well documented. The fact that XD's Shadow Pokémon and certain Gen 5 legendaries cannot be shiny? Factored in perfectly. Unusual stat totals? It's got that covered. An obscure glitch that only affects five species? Of course. And if a Pokémon has a Trainer/Secret ID of 00666 or some equally unlikely number, it displays the message "Suspicious trainer IDs." The only way past it is to hack a Pokémon that is identical to one that could have been generated by a core series/Gamecube Pokémon title. Which is the intention.
  • TV Tropes itself. Angry, or just playing around and want to do an all Caps Lock editing reason? Your edit won't go through.
  • The Gaston Trilogy has an in-universe example. Lefou's Quest IV has no fewer than five unique ways to die on the first level alone, one of which is both ridiculously elaborate and relatively obscure, and the game over screen also references which way you died last. It’s also possible to do a ton of actions that seem counterintuitive such as using someone else's belt as a weapon on the boss or stab him with nothing, which all have unique responses, and damaging the boss in his eye results in him getting an eyepatch.

    General 
  • IBM RnD, according to Prof Moriarty speaking on the Sixty Symbols YouTube channel. "You read [one of their research papers] and questions arise. Then you go back and see 'oh, right, they've done that as well'. And then you think 'well maybe this', but every single question is covered."
  • Detroit's Comerica Park, home of the Tigers, has a statue garden of their legendary players in the deep center field stands. One of them is memorialized with his glove up and open. The artist took the time to fill the interior of the glove with small nails, so that on the one-in-a-million chance that a home run is hit into the glove, the statue will "catch" it.
  • The iOS app Siri is an "intelligent personal assistant" that can look up information via voice commands. It also has smart-ass responses to a number of questions, requests, or commands, like "How much wood would a woodchuck chuck if a woodchuck could chuck wood?" ("That depends on if we are talking about an African woodchuck or a European woodchuck."), "What are you wearing?" ("Aluminosilicate glass and stainless steel. Nice, huh?"), "Talk dirty to me" ("The floor needs vacuuming.") and "OK Google"note  ("I think you got the wrong assistant.")
  • The Amazon Echo, a speaker / microphone array that acts as the interface for Amazon's cloud-based personal assistant, has a long, long list of "Easter Egg" phrases to which it will respond with a joke answer, and as a cloud-based platform, more are being added every day.
  • When using some email processors, if you write the words "Attached is/are..." without giving an attachment, the program will point this out, and ask you if you want to attach anything. This is quite useful (or annoying if you're a high school student trying to use an excuse other than "the dog ate it").
  • The free music program Spotify plays commercials between songs. If you mute your speakers during these, the commercial pauses until you unmute the sound.
  • Several websites are now able to detect if the user has adblocking software installed. Some merely add a message intended to guilt-trip you into turning it off, while others are more intrusive. Some take it to absolutely ridiculous levels; Blip.tv, for example, rapidly gained infamy for making you stare at a static message for 90 seconds that helpfully informed you that their ads were much shorter.
  • Google Maps:
    • Driving directions are given for journeys on different continents, including at necessary places "Sail across [insert body of water]".
    • Often times the navigate feature will choose the fastest route, not necessarily the shortest route, as the shorter route may take longer due to factors such as lower speed limits, more stoplights, etc. However, it also takes traffic into account as well. It's also scarily accurate with the estimated time to arrival, adjusting the ETA accordingly with your average speed.
    • An update tells you which lane you need to be in if encountering a fork or intersection and the secondary routes along the way with a change in ETA if you decide to take that route.
    • Ask it for walking directions to Mordor.
  • As it turns out, someone had the foresight to add tamper-proof measures to photobooths - they'll take your picture if they detect someone trying to, for example, steal money from the machine as this thief found out.
  • Laws are often awfully specific, especially if they forbid something. That has a very simple reason: Almost all legal systems work under the assumption that anything which is not explicitly forbidden by law is allowed and no law may ever apply retroactively. So whoever writes the laws has to anticipate a lot. Some laws are therefore rather general, but some are awfully specific, like the German law on nuclear explosions.


Alternative Title(s): The Dev Team Thinks Of Everything

http://tvtropes.org/pmwiki/pmwiki.php/Main/DevelopersForesight?from=Main.TheDevTeamThinksOfEverything