-> '''Question''': Can we use "Go Up A Level" cards on other players to make them fight a monster that would otherwise ignore them?\\
'''Answer''': We want to say no, but that's just such a Munchkin thing to do that we have to allow it.
-->-- ''TabletopGame/{{Munchkin}}'' FAQ

The aversion of the control the developers have on the players. Basically, the player finds ways to play the game that the developers and designers did not intend.

Usually a GameBreaker, it often leads to GameplayDerailment, but not always: in some cases, it can become an AscendedGlitch, or is considered "fair" in some way (for example, the intended use is (at least) just as useful, and there exists some limit on how frequently you can use the unintended mechanic (see, for example, Time Outs in Sports, below)).

In TabletopGames, the discovery of a GameBreaker via Not The Intended Use usually leads to the ObviousRulePatch, especially in tournament-level play.

Often used by {{speed run}}ners and other [[ChallengeGamer Challenge Gamers]]. When it's an actual software ''glitch'' that's exploited, it belongs under GoodBadBugs.

Subtrope of EmergentGameplay. See also: WeaponizedExhaust, RecoilBoost. Contrast UselessUsefulSpell and MundaneUtility. Also contrast FakeDifficulty, caused by control or other design problems. When an element is ''intentionally'' fudged in the player's favor, it's an AntiFrustrationFeature.


[[folder:Anime and Manga]]

* ''Manga/FateKaleidLinerPrismaIllya'': Counter Guardians are entities meant to protect humanity. After gaining the power of one through [[spoiler:the Archer Card]], [[spoiler:Shirou]] decides to use it for the sake of saving a single person, knowing very well that his actions are detrimental to humanity and go against the purpose of what said-power was intended for.
* Part of the fun of ''LightNovel/Overlord2012'' is seeing typical fantasy spells used in creative ways. One early example is Ainz providing two Summon Goblin Army scrolls to a village he'd taken a shine to, to protect them from attacks once he left. Once he was gone, the girl he provided them to used them while there were no enemies around at all... and had the army [[TrainingThePeacefulVillagers teach the villagers to defend themselves]] and assist in designing and building fortifications.
* ''Anime/SwordArtOnline'' has Outside System Skills, abilities that weren't programmed into the game that players created for themselves. The most well-known and oft-used of these is "[[SwitchOutMove Switch]]", where one player attacks with a Sword Skill, then an ally attacks the offset opponent with a Sword Skill of their own while the first attacker recovers.
* In chapter 4 of ''Manga/GoblinSlayer'', Goblin Slayer uses the Priestess' protection spell [[spoiler:to prevent a bunch of goblins from escaping the massive fire Goblin Slayer started.]] The Priestess herself is disturbed by the tactic.

[[folder:Card Games]]
* ''TabletopGame/{{Dominion}}'' has the Chapel card; intended to get rid of hurtful curse cards, people realized it could be used to streamline your deck by trashing the low-value cards you start with. [[FollowTheLeader Later deckbuilding games]] such as ''Puzzle Strike'' and ''Ascension'' [[AscendedGlitch use this as an intentional design choice]], so removing your own cards from the deck for greater efficiency is now expected. ''Ascension'' doesn't even ''have'' any harmful cards to remove.
* The [[Tabletopgame/YuGiOh Yu-Gi-Oh! card game]] has more than a few instances of this too:
** Barrel Behind the Door was initially meant to bounce back damage done to you by effects. It works just as well bouncing non-cost damage from your cards to your opponent. It was even released in the same set as Ring of Destruction, a card that does massive amounts of damage to you and your opponent; the Ring/Barrel combo swiftly became one of the most popular in the game.
** Using Doomcaliber Knight's ability to negate your own effect, which destroys him... so you can summon a quite powerful Meklord Emperor.
** Gate Guardian is a high-ATK monster that's incredibly hard to get out... but you don't need to get him on the field to fuse him with a card released much later, [=UFOroid=], to form an even stronger [=UFOroid=] Fighter.
** [[http://yugioh.wikia.com/wiki/Royal_Oppression Royal Oppression]] was designed to be used as an anti-meta card to cripple meta decks reliant on special summoning. But then players began to realize that they could swarm the field with big monsters and then activate it during the opponent's turn to lock them out from their own special summons. This ultimately resulted in it getting banned.
** There are quite a few cards that operate at the cost of letting your opponent draw cards. Since you instantly lose if your deck runs dry some savvy players built decks ''entirely'' out of these cards, using their intended effects as defense while they bled their opponent of all his resources.
** Divine Sword - Phoenix Blade is a subpar Equip Card, exclusive to Warriors, that provides a miniscule ATK boost. However, it was also a staple in one of the most popular Decks of its day, Diamond Dude Turbo, for its secondary effect of "remove two Warriors in your Graveyard from play to add this card back to your hand." Players would use Phoenix Blade's secondary effect over and over, then activate Dimension Fusion to resummon all the cards they removed.
** Which players are the biggest users of Toon Table of Contents, a card that lets you search out any card with "Toon" in its name? If you guessed Toon players, you'd be wrong - Toon Table of Contents is used in nearly all modern Exodia Decks. This is because you can use Toon Table of Contents to search out copies of itself, and there's no limit to how often it can be used. That translates to three cards removed from your Deck, and three Spell Counters on Royal Magical Library... and you can then either search out Toon World for a fourth counter, or Blue-Eyes Toon Dragon to discard for Trade-In. Toon Table of Contents is actually straight-up better than Gather Your Mind, a card where this use ''is'' the intended use.
** This is what got Self-Destruct Button (a card that forces the Duel to a draw if your opponent has 7000 more LP than you) banned. Instead of using it as a last-resort TakingYouWithMe, players would fill their decks with cards that gave your opponent LP, then activate Self-Destruct Button at the first possible opportunity.
** Last Turn is meant to be an extreme last-resort gamble: it can only be used when your LP are 1000 or less. It picks a monster on your side of the field, then sends everything else to the Graveyard, then your opponent Summons something from their Deck and attacks, with the survivor winning the Duel. The gamble involved was the risk that your opponent could Summon something stronger. However, Last Turn ignored the possibility of cards that could stop the Special Summon in some manner (see Jowgen the Spiritualist, Vanity's Fiend, Last Warrior from Another Planet) and the existence of cards that could pay massive amounts of LP (Wall of Revealing Light, Inspection, Backs to the Wall). If the opponent couldn't Summon a monster for Last Turn, you won by default. The resulting "Last Turn OTK" sent Last Turn to the banlist.
* TabletopGame/{{Munchkin}} allows you to use "Go Up A Level" cards ''on your opponent'' in order to force them to fight/run away from a monster that would ignore them if they were just one level lower.
** The creators of the game were asked if the cards could be used that way--while that hadn't been the intent, the creators responded it was such a Munchkinly thing to do, they just couldn't say no.
* ''[[TabletopGame/{{Pokemon}} Pokémon Trading Card Game]]'':
** Claydol's "Cosmic Power" is meant to draw cards from the deck, but its secondary effect, putting 2 cards back to the bottom of the deck, can also be used to prevent a player from running out of cards in one's deck and thus avert a loss by decking out.
** The trainer card Gamble can be used the same way, though somewhat more risky. You shuffle your hand into your deck and flip a coin. Draw 7 for heads, 1 for tails.
** The Mysterious Fossil card was intended to be used as the fossils in the [[VideoGame/PokemonRedAndBlue original Game Boy games]], as a method of acquiring Kabuto, Omanyte, or Aerodactyl. However, the mechanic allowing it to be your Active Pokemon yet not permit a Prize draw when your opponent KO'd it meant that many players used it as a cheap wall while they set up their actual Pokemon. [[ObviousRulePatch Future Fossil cards did not work this way]].
* In ''MagicTheGathering'', many combo decks (and subsequently, card bannings or errata) come from this sort of behavior. Although one can debate over which examples qualify as "not intended" vs simply "not ''obvious''"; the developers do fully ''intend'' for players to come up with card combinations they didn't see themselves and simply hope that they won't miss any that break the game, while in some cases they're aware of the unorthodox use and go ahead anyway. Examples include:
** [[http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=121155 Dark Depths]] and [[http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=192232 Vampire Hexmage]]: The Hexmage was meant to remove beneficial counters from permanents and as a way for black to deal with planeswalkers. But with Dark Depths, you can remove all the counters to get a 20/20 flying indestructible creature on turn 3.
** Cascade cards and [[http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=113533 Hypergenesis]]: You're supposed to suspend Hypergenesis, but cascade lets you search it out of your deck and cast it for free. This also works with other cards with no mana cost, such as [[http://gatherer.wizards.com/Pages/Card/Details.aspx?name=living+end Living End]].
** [[http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=287335 Grove of the Burnwillows]] and [[http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=247550 Punishing Fire]]: The Grove is supposed to be a dual land that fights against red and green's aggressive nature, but it lets you get back Punishing Fire instead.
** [[http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=3255 Lion's Eye Diamond]]: Intended to be a bad Black Lotus, instead you can toss your hand into your graveyard as a beneficial effect for [[http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=5629 Yawgmoth's Will]] (often used while a tutor for Yawgmoth's Will (or Yawgmoth's Will itself) is on the stack, doubly stupid because you can then recast it from the graveyard and get more mana with no drawback whatsoever), dredge cards, or madness cards. Another extremely powerful trick with it is to use it while a draw-7 spell (which generally cause you to discard your hand and draw a new one) is on the stack, so that it again has no drawback, or while a reanimation spell which does not need to declare a target is being cast, so as to put the card in question into your graveyard for ready reanimation.
** Wizards of the Coast is infamously bad at making a "bad" Black Lotus; [[http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=194975 Lotus Petal]], a Black Lotus which only produced one mana instead of three, came out shortly thereafter, and was restricted shortly thereafter. When they made [[http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=370562 Lotus Bloom]] later on (a black lotus which took three turns to come into play), it yet again caused problems by allowing [[http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=370537 Dragonstorm]] decks (itself a previous JunkRare, reprinted because it was theoretically a bad storm card due to costing too much mana) to get a bunch of extra spells cast on the fourth turn for free. Combined with [[http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=121217 Rite of Flame]] and [[http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=243487 Seething Song]] (attempts to create "fair" [[http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=373329 Dark Ritual]]s), along with [[http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=96864 Gigadrowse]], a card intended for limited but actually useful for tapping all of your opponent's lands during their endstep to prevent them from interfering with your plans (and nearly uncounterable due to its own ability to replicate itself into multiple spells), the deck created a rather terrifyingly powerful combo deck which regularly "went off" on turn four and instantly killed the opponent via [[http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=243464 Bogardan Hellkites]].
** Another "bad" Lotus attempt was [[http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=4593 Lotus Vale]], which required you to sacrifice two lands in order to keep it with the end result of getting three mana out of one land. Unfortunately, how it was initially worded caused it to be able to tap for mana in response to its own sacrifice requirement, making it essentially a one-a-turn Black Lotus. This was errataed, however, and no longer works that way.
** [[http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=159749 Illusions of Grandeur]] and [[http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=15168 Donate]]: Two quirky {{junk rare}}s for casual players that combined to become one of the most famous kill conditions in the competitive ''Magic'' history. It didn't help that Illusions of Grandeur has the text "gain 20 life" on it, which, with [[http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=194977 Necropotence]] in play, reads an awful lot like "draw 20 cards".
** [[http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=5833 Waylay]]: Meant as a way to get temporary blockers, but a rules change made it into "White Lightning," a way to get hasty attackers for a turn. It was errated to only work as intended.
** [[http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=3337 Flash]]: Meant as a way to play creatures at times you're normally not allowed to, it does this by letting you put a creature card from your hand into play, but you have to sacrifice it unless you pay its mana cost reduced by 2 (where 2 is the cost of Flash itself). What this ''actually'' means is that for 2 mana you can get the "when this comes into play" and/or "when this dies" effect of an arbitrarily expensive creature, some of which are powerful enough to instantly win the game with the right support. It was errata'd the first time this abuse was discovered with [[http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=15138 Academy Rector]], then un-errata'd due to a policy change to minimize the use of errata, and promptly banned or restricted in all the formats it was still legal in thanks to an instant-win combo with [[http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=107598 Protean Hulk]].
** [[http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=201122 Boomerang]] existed for years as a cheap and fairly versatile blue bounce spell; it seemed fair enough, so printing a worse version in [[http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=79155 Eye of Nowhere]] seemed safe enough. At the same time, the long-time classic [[http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=247316 Howling Mine]] was in print, a card which historically was sometimes used with artifact tapping abilities to give card advantage, but was typically viewed as a weak combo piece. [[http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=84364 Kami of the Crescent Moon]] was a generally worse Howling Mine, a weak creature which could blow low-powered creatures but which was fairly easily killed. While alone, some of these cards were alright, in concert, combined with more powerful delaying cards like [[http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=380255 Remand]] and [[http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=84065 Exhaustion]], both of which also helped to keep the opponent's hand full without letting them actually play any spells, the deck would rather quickly bounce the opponent's ''lands'' back into their hand while preventing them from casting any spells, putting various card draw spells into play which would cause the opponent to draw so many cards that they had to discard the excess cards, something which almost never happens in tournament play. Worse still, [[http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=88799 Ebony Owl Netsuke]] and [[http://gatherer.wizards.com/pages/Card/Details.aspx?multiverseid=129750 Sudden Impact]] had been printed as a means of punishing decks which took advantage of the Kamigawa block mechanic which encouraged players to keep their hands full, a nearly useless mechanic due to the fact that it meant that the player wasn't casting spells, and as such, spells designed to punish cards that no one ever used were pretty useless. But in this deck, it simply punished absolutely everyone for daring to sit down at the table. A very powerful deck, it was quite good at completely destroying control decks, but had absolutely no ability to win games against aggressive decks which played lots of cheap, powerful creatures and burn spells, which the deck only gave further fuel to.
** Another example from the same time period was the Eminent Domain deck, so-named because it used [[http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=84564 Annex]], [[http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=88945 Dream Leash]], and [[http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=83037 Confiscate]] to steal their opponent's lands, [[http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=249384 Icy Manipulator]] to hold creatures at bay and tap down more lands, [[http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=83281 Stone Rain]] to destroy what lands it couldn't steal, and finally [[http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=83483 Wildfire]] to destroy all of the lands the opponent had left, along with whatever creatures they'd managed to play, while leaving them with excess lands due to their own stealing and artifact mana, which was untouched by the wildfire; if the opponent DID manage to cast some good creature, then they'd just steal it with Dream Leash or Confiscate themselves. While Wildfire was known to be a very powerful card, Annex had been thought of as a means of punishing players for playing certain kinds of lands, not as a means of allowing a player to steal their opponent's lands and cast a wildfire with a two-land advantage, possibly as early as turn four. The sheer number of permanent stealing spells made the deck extremely versatile, as it could steal anything the opponent used to fight with - lands if they needed mana to cast powerful cards, creatures if they were a threat, and even valuable artifacts - and set the world on fire with a huge advantage on its side. As a result, land-stealing spells became much harder to come by afterwards.
** Even some of the official [=WotC=] staff have gotten in on this. Back before he became Rules Manager and thus [[DefectorFromDecadence devoted himself to curtailing this sort of madness]] (whether or not this is a good thing depends on your perspective), Mark Gottlieb ran the House of Cards, a weekly column devoted to creating insane decks and combos, the most infamous of which was turning a [[http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=49026 subpar creature-producing artifact]] into a [[http://archive.wizards.com/Magic/Magazine/Article.aspx?x=mtgcom/daily/mg108 repeatable board-clearing engine of destruction.]] He even paraphrases the trope's name when describing the combo!
** [[http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=397443 Grindstone]] was an artifact from ''Tempest'' that discarded the top two cards from a player's library, and repeated the process if their colors matched[[note]]A third of the average deck is lands, which are colorless. Getting even one of these as the two milled cards stopped it from repeating, as it only works if both share a color, and "colorless" isn't a color. Needless to say, getting more than one repetition was rare.[[/note]]. It was considered a JunkRare and was quickly forgotten. Over ten years later, Shadowmoor came out and had a "color matters" sub theme, so they printed [[http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=146022 Painter's Servant]], which made all cards in the game count as any of the five colors. When the two are played together, you can destroy your opponent's entire deck on turn 3. [[/folder]]

* Invoked InUniverse in ''Disney/WreckItRalph''. [[spoiler: Vanellope's glitching can be exploited to pass other racers, which quickly makes her the most popular character after Turbo is defeated and she becomes a playable character.]]
* In the ''Franchise/{{Terminator}}'' series, the titular machines have detailed files on human anatomy to make them quick, effective, and efficient killers in almost any scenario. When reprogrammed to protect someone, however, these same files make the machine a fantastic field medic: the ''polar opposite'' of what these things are meant to do.

* P.J. O'Rourke's ''The Bachelor Home Companion'' has a lengthy list of alternative uses for household utensils. (For instance, did you know that an upended steam iron can be used as a hotplate? Also, while a regular screwdriver makes a good tool for spreading putty, a Philips head screwdriver would be useless for that purpose: it should be used to punch holes in cans of beer when the pop top has broken off.)
* In ''LightNovel/SwordArtOnline'':
** Kirito has a unique skill <> from the game [[TitleDrop Sword Art Online]]. When he got out of the game and started playing another game called Alfheim Online, he lost the skill but managed to use it by chaining one-handed abilities with each of his hand, controlling both of his hands separately by using muscle memory and calculating his skill use timing with the skill cooldowns. It was not supposed to happen at all, [[HandWave but he does have the excuse of having the best reflexes in]] SwordArtOnline [[HandWave (which is why he got the aforementioned unique ability) and had to learn how to fight efficiently due to being a solo player]]. He used the blade his character got during its creation in Gun Gale Online (another thing that was not supposed to happen) to deflect bullets shot by other characters with help of their own targeting markers. After returning to Alfheim Online, he started using his blades to deflect spells as well.
** One character in ''Sword Art Online: Lost Song'' is nominally a Leprechaun character who can somehow also dual wield. It turns out that this ability is due to their races' natural ability to utilize any races' weapons temporarily for the purpose of crafting/strengthening them - and the ability is actually ''multi-wield'' - as in their OSS, Thousand Swords.
* In the ''Franchise/{{Star Trek|NovelVerse}}'' novel ''The Kobayashi Maru'', this is possibly the real point of "the ultimate test of character"; Everyone who has "beaten" the Kobayashi has been a Grade-A badass. The method they use pretty much defined their career. Kirk conned the system like the improvising madman he is, but most of his named crew have taken it as well.
** Sulu went the diplomatic route and left the Kobayashi Maru to its fate, justifying it as a trap. The first to ever do it.
*** Mackenzie Calhoun of the StarTrekNewFrontier books actually one ups Sulu by [[ShootTheHostage destroying the Kobiashi Maru]] and warping out immediately.
** Chekov kept taking out enemy ships until his weapons were gone, then he kamikazed. Took out dozens before that point.
** But perhaps the best of all was Scotty, who just kept coming up with new engineering tricks[[note]]the Perera Field Theory, if you're curious[[/note]] which mathematically should work, but doesn't in practice (kind of like the theory of igniting the Earth's atmosphere with a nuke - as Scotty knows full well since he was the one who tested it) and the system just kept escalating until the computer actually spawned more ships than actually existed in known space at that time, all warships equipped with offensive and defensive technology that hadn't even reached the prototype stage yet. And it still didn't even slow him down. At that point the examiners shut the damned thing down themselves, perhaps in fear that the simulator was about to go Terminator on them.\\
At the time, he didn't know about the "unwinnable" part of the situation, and when he was debriefed he showed off a dozen or so more tricks he'd come up with while he was waiting. The examiners looked at everything he'd come up with and determined that the only way that the simulation could potentially beat Scotty would be if he spent several days of outwitting it before collapsing out of sheer exhaustion. Scotty then protested that if he had access to an actual engineering room, he could have beaten the simulation. The admiral in charge of the test, ''not'' amused by this cheeky solution, boots Scotty out of the command stream... and into pure engineering, which they both know is [[{{Unishment}} what he really wants anyway]].\\
...Aaand there you have Montgomery Scott's career in Starfleet. Turns out they knew it all in advance.\\
...Which makes Johnathan Archer pretty much the biggest JerkAss ''ever'' in the reboot, throwing away Neo over losing his damn dog...
* ''Literature/StarCarrier'':
** Terran Confederation {{Space Fighter}}s are equipped with AMSO canisters, missiles packed full of granules of degenerate matter ("sand") that are used as anti-missile countermeasures. At the end of the first book a squadron led by Lieutenant Trevor Gray accelerates to near lightspeed before releasing them and rather thoroughly [[PrecisionFStrike fucks up]] an incoming Turusch battlefleet. Gray acquires the callsign "Sandy" for this and is later described as having added a footnote to the manual. By book four, twenty years later, this has actually become a standard maneuver.
** Also in book four, Gray's SuspiciouslySimilarSubstitute Lt. Donald Gregory brings his fighter in an extreme close-range pass against a Slan warship (the narrator the sound of his fighter ''scraping the hull''), allowing him to [[WeaponizedExhaust insert his drive singularity inside the ship]]. This destroys it from the inside out.
* Creative use of technology is a hallmark of craftier characters in the ''TabletopGame/BattleTech'' universe. For example, there's Kai Allard-Liao, who was forced into an unfair six-versus-one training fight due to the machinations of his cousin. The training exercise disables military communications, including contact with GPS satellites--as a result, he has no overhead map and no idea of where his foes are. However, the exercise programming didn't disable contact to civilian equipment... so he finds the frequencies for ''geographic survey satellites'', which he promptly commands to look down at his area and report sources of low-level seismic activity. Turns out that HumongousMecha footsteps register on the Richter scale, granting him instant improvised tracking of his opponents. Even his more honorbound trainers declare the move 'incredibly resourceful,' much to the fury of his notoriously unhinged aunt.
* ''Literature/HarryPotterAndTheHalfBloodPrince'': Fred and George invent a hat with a built-in Shield Charm that lets the wearer NoSell most spells, the idea being to wear it and laugh at your friend's attempts to jinx you. Instead, it becomes one of their best-selling items as the Ministry, desperate for any kind of protection (having received a brutal awakening as to the return of Voldemort), has ordered half a thousand for its staff (it turns out very few people can do a Shield Charm by themselves).
* ''Literature/ArtemisFowl'' has a mining laser quickly converted into a very illegal weapon by many street gangs.

[[folder:Live Action TV]]
* The ''entire'' premise behind ''Series/MacGyver''. Not only does he put together some creative devices with the tools at hand in ways most would not expect, he often doesn't even use the tools at hand in the logical fashion--in one instance, he is locked in a room and has a revolver, but as he he DoesNotLikeGuns, he disassembles the bullets, puts the gunpowder into a hanky, sticks a primer in one side, puts the whole thing into a keyhole, and gives the primer a good hard rap with the butt of the gun, blowing out the deadbolt. It honestly would be so much easier to ShootOutTheLock, but the man has his standards.
* ''Series/MythBusters'' does this to the point that during the "airplane on a conveyor belt" myth Jamie pauses for a moment when he realizes that for once they ''are'' using a commercial product (specifically a remote-control model airplane) in the way it was intended to be used.
* In ''Series/{{Dinosaurs}}'', Baby likes hitting Earl over the head with a frying pan, until one breaks, and the Sinclairs try to use the frying pan's warranty to get a new one. The manufacturer denies the claim as the frying pan was meant for cooking, but the warranty didn't specify "cooking", it said the pan was guaranteed for "normal use", and in the Sinclair house, the "normal use" of a frying pan is Baby hitting Earl over the head with it.

* Scratching records in hip-hop. In a similar vein, overdriving a guitar amp to distort the sound.
* The Roland TB-303 was supposed to just play a preprogrammed repeating bass line. Then someone noticed what happened when you tweaked the filter knobs while it's playing, and the genre of Acid House was born.
* AutoTune was originally intended to change the frequency of the singer's singing or musician's playing to the correct one. Then Mark Taylor and Brian Rawling noticed while working on Cher's "Believe" that if you set it on the most aggressive setting, it sounds unnatural, but kind of neat.
** On a deeper level, the technology behind Auto-Tune wasn't originally developed for music production at all - it was to help oil drillers interpret seismograph data.
* Circuit bending: the act of taking a device that makes sound (for example, a children's toy), modifying the hell out of it, and then using said device to make music.

* Time outs in several sports:
** For instance, Basketball and Lacrosse. Intended to allow teams to meet and plan strategy. Can be used tactically to prevent a player from losing possession and restart play in a controlled manner. Only possible in "American" basketball. Other countries (under FIBA rules) will only allow a time out when the time is already stopped.
** UsefulNotes/AmericanFootball:
*** The most common use for a timeout is to stop the clock, and the second most common is to avoid a penalty for delay of game or too many men. It's far rarer for a timeout to be called to talk strategy on a critical play.
*** Somewhat less common is the use of a timeout to "ice the kicker". If your opponent is about to kick a field goal, some coaches believe that calling a time out ''just before'' the play starts will mess with the kicker's psyche enough to cause him to miss the field goal when he does eventually kick it. This is only done occasionally, however, because in most circumstances time outs are much more valuable for the above-mentioned unintended uses than for this one (if it ''is'' done, it's generally done at the end of a half, since the team in question probably won't get another chance to use it). Icing the kicker at the pro level generally does not work unless it is an incredibly long distance, and if mistimed, often just serves to give a free warm-up kick to the kicker; since there is usually no penalty on the kicker for kicking even if the whistle is blown, the kicker is often instructed to just follow through on the kick even if the play is blown dead.
*** An interesting use for a timeout was discovered on 12/8/13 in the game between the Philadelphia Eagles and the Detroit Lions. The Lions called timeout before an extra point attempt in order to clear snow out of the kicker's way. The kick got blocked anyway.
*** [[TakeYourTime Delay of game infractions]] in American football are charged on the offense when they allow the play clock to run out without snapping the ball as a way to prevent a team in the lead to just sit on the ball for huge chunks of time. The penalty is five yards. There are some occasions, though, when a team will intentionally get flagged for delay of game because [[{{Unishment}} they want to back up five yards to give their punter more space]] to punt the ball deep in the "coffin corner" (as close to the opponent's goal line as possible without crossing it - a punted ball that touches the end zone is called as a touchback and the opponent will get the ball at their own 20-yard-line). It's less common now, as opponents have taken to declining the distance penalty.
** Similary to icing the kicker in American football, a timeout will often throw off the server in volleyball. The practice is so widespread that in many matches, that's almost all it's used for.
** Modern flat track Roller Derby, depending on whether or not the Head Referee lets you get away with it. Calling a time out when there is less than 30 seconds left on the period clock can allow you to sneak in one last final jam when the time out ends, which must then be played to its natural conclusion (up to two minutes) even if the period clock runs out.
* Olympic fencing's flicks and whip-overs. Fencing weapons are nowhere near as stiff as swords for obvious reasons, so fencers have used these properties to deliver non-standard attacks that count in the rules of electric fencing but would make no sense if the weapons were real swords. Generally fencing can be viewed from both a traditionalist and competitive point of view, so the same fencer who flicks in a tournament might not in a casual bout. The sport's governing body, the FIE, has put a serious {{Nerf}} on flicks, but they remain viable.
* The cages used in MixedMartialArts were merely meant to be a structure keeping the combatants in one area (rings have been used and still are, but due to the grappling nature of the sport, these are becoming less and less popular due to people falling out of them.). Fighters soon learned they could be used to stand up from the ground, holding your opponent against it do damage, etc. This is viewed as both good and bad, depending, but has become such an integral part of the sport many fighters train specifically for using the cage effectively from different positions.
** Blatantly grabbing the fence is illegal however. This was established as a rule fairly early, as people were doing this to stop takedowns and get up from the ground more easily. Originally, the rules said nothing about grabbing with your toes however, and many fighters exploited this. The Unified Rules of MMA recently outlawed this practice.
** The short-lived YAMMA organization experimented with a bowl type cage, which in theory would keep action moving better. What ended up happening in the one event they did was wrestlers found it great for backing people against the raised edges and taking them down more easily for some lay and pray.
* In both the NFL and college, there is a system where a player can be kept for an extra year without counting against your roster (the IR system in the former, a medical redshirt in the latter). Many teams will play up an injury which is serious enough to keep a promising but raw player out most of the year in order to use these to gain an extra year of training. Both leagues have begun to push back against this practice, however.

* Benzoyl peroxide is commonly marketed and used as a treatment for acne, but for toy collectors (particularly doll collectors), such peroxide creams, most especially the 10% Oxy variety, are recommended for removing ink and dye stains on Franchise/{{Barbie}}s and Franchise/AmericanGirl dolls.
* SC Johnson's Future brand of acrylic floor polish (now marketed in the States as [[http://www.pledge.com/en-us/products/pages/floor-care-finish.aspx Pledge FloorCare Finish]]) also found a similarly unrelated niche amongst scale model hobbyists, to which the latter use the substance for coating windows and canopies for model aircraft and other vehicles.
* For some reason, hobbyists have taken an interest in installing Linux or Android onto educational children's toys, particularly tablets or game consoles targeted at younger audiences. As long as it has a color LCD screen on it or connects to the TV, hobbyists want to see if it can run Linux or Android. If it already runs Android, hobbyists want to get rid of the ''kiddified'' UI and put in a more adult-oriented one.
* Then there's the music scene. If toys are not outright circuit-bent, the sounds are sampled and used as part of the artist's music for one reason or another.

[[folder:Video Games]]
* In ''VideoGame/{{Pikmin}}'', if any color pikmin other than blue wanders into water, they'll flounder about for a bit before drowning. Naturally, this means that only blue pikmin can get items submerged in water. However, certain puzzles involve taking blue pikmin to an island to build a bridge or otherwise clear a path for their other colored brethren. And when pikmin fall into water, you're given a small window that you can use to lead them back to land. With careful timing, it's possible to lead non-blues into water and have them swim across short channels without dying. Throwing them halfway across before starting to lead them can practically double the distance they can swim. Utilizing this trick can help players collect certain ship parts/treasures much earlier in the game than intended and tends to be vital for minimum day runs.
* ''Franchise/FinalFantasy'':
** Using the Swap spell to turn you into a statistical PhysicalGod in ''VideoGame/FinalFantasyII''. Its intended use was likely for emergency HP/MP refill purposes. Similarly attacking your own characters to get an HP gain. Akitoshi Kawazu mentioned that doing that never occurred to him when he designed the game, and the ability to strike the other [=PCs=] was only added so that you could wake them up if they got hit with a sleep spell.
** In ''VideoGame/FinalFantasyIV'', in the DS version, the Adrenaline augment doubles the damage a character inflicts when he or she is at critical health. Casting Tornado on a character with Adrenaline is an easy way to satisfy this condition. This is particularly useful on Rydia who can [[GlassCannon barely take hits anyway.]]
** The Excalipoor in Final Fantasy V is a JokeItem that only deals 1 damage per hit. However, it does have a high battle power, which can be abused in two ways: equipping it and using the [[PowerCopying Blue Magic spell]] Goblin Punch deals high damage, as does [[ThrowingYourSwordAlwaysWorks throwing it]]. It also has perfect accuracy and ignores evasion, making it useful against [[DemonicSpiders Skull Eaters]] or with certain Spellblade abilities.
** ''VideoGame/FinalFantasyVI'':
*** Vanish makes you immune to physical attacks, at the cost of making you unable to avoid magical attacks. Due to a glitch, bosses which were normally [[ContractualBossImmunity immune to instant kill attacks]] became vulnerable to them when under the effect of Vanish, making it possible to bypass most bosses easily. There were steps to fix this in the [=PlayStation=] remake, but it wasn't truly fixed until ''Final Fantasy VI Advance''.
*** The spell Rippler trades status boosts/ailments with another target. Its intended use was to steal buffs from enemies and give ailments to them, but because of the way certain other abilities were coded, it could also be used to give a character the Magitek menu option, make Shadow's dog Interceptor protect another ally, or make any character use Gau's Rage or Mog's Dance techniques. Unfortunately, this also means an enemy capable of casting Rippler can inadvertently take these from you, which can render Interceptor [[PermanentlyMissableContent unobtainable]].
** The Death Sentence [[PowerCopying enemy skill]] in ''VideoGame/FinalFantasyVII'' is almost entirely useless when used on enemies, due to the ridiculously long timer before the instant-death actually takes effect. The optimal use for the spell is to give Tifa either the Powersoul or the Master Fist - weapons which drastically power up when the user is "[[ExactWords near death]]" - and cast it on your own ally, making her strong enough to OHKO enemies with a single physical attack.
** Any limit break in ''VideoGame/FinalFantasyVIII'' could be accessed by keeping your HP low and repeatedly hitting the O button though this may have been intentional. What's clearly not intentional is abusing this with Selphie's limit break then opening up the cover of the [=PlayStation=], which causes the game to go into a pause like loop where you continued to scroll through her normally random skills until you got one you wanted. Considering "The End" even worked on bosses, ''including the final and the bonus boss'', it made the entire game pointlessly easy.
** ''VideoGame/FinalFantasyX'': [[WhatTheHellHero lets you target your own teammates with your spells]]. It turns out that using a magic-reflecting spell on them first then the spell will go through the ''enemy's'' reflect.
*** Tidus and Wakka have Blitzball skills that involve kicking and punching sports balls hard enough to move a long distance through water. As it turns out, this translates to doing considerable damage on impact when it's moving through the air, (and in Wakka's case, even on airborne enemies hundreds of feet away). Oddly enough, Tidus' Jecht Shot, which involves punching and kicking the ball [[UnnecessaryRoughness into several defenders before going for the goal]], isn't used as a combat move.
** The [[GratuitousNinja Ninja class]] in ''VideoGame/FinalFantasyXI'' was originally supposed to be a StealthExpert [[TheStrategist Strategist]] attacking from the shadows. This is most evident in the effects of it's signature armor which actually lowers enemy focus on the ninja. However, using one the ninja's special moves called "[[DoppelgangerSpin Utsusemi]]" where the ninja gains shadows that absorb enemy attacks. Coupled with its [[HighSpeedMissileDodge superb evasion]], the ninja is actually considered one of the best tanks in the game, right up there with the [[MightyGlacier heavily-armored]] [[KnightInShiningArmor Paladin]].
** The Measure weapons in ''VideoGame/FinalFantasyXII'' are absurdly weak weapon types that randomly confer a ''positive'' status on hit. The intended use of measures was, one presumes, to be a tool for casters to buff the party without expending MP. The thing they're more useful for? Getting rid of [[StandardStatusEffects Confusion]]. (A confused character will physically attack their allies and themselves until they are either cured or physically struck, since the item that cures confusion is slow enough that the confused character will still get off an attack or two against their allies or themselves, it's better to just save money and equip confused characters with measures so they can't meaningfully damage the party--[[HealthDamageAsymmetry very important at high levels]]--and will even buff them, then take it off when they're back to normal).
** ''VideoGame/FinalFantasyTactics'' examples:
*** The Throw Stone/Dash ability in ''VideoGame/FinalFantasyTactics'' lets you build up Job Points. Otherwise, it's just useless damage at long range; this also happens with Accumulate/Build Power. The +1 to physical attack is meaningless unless you do it a lot, and most enemies really won't let you do it a lot. But leave one enemy alive, and send all your units running around the battlefield spamming the ability, and ''hello'' job points! In fact, there's a lot of abilities that might be useful, but are much better at building job points.
*** Throw Stone/Dash also has a very high chance of knockback, leading to a situational use where you can use it to shove your own allies out of harm's way from a distance or outright murder enemies by knocking them off, say, a cliff.
*** The AI will never attack a confused character if they cannot kill that character in one or two hits. Under normal circumstances, this is a good idea. However, in the [[SelfImposedChallenge Self Imposed Challenges]] allowing only one character (out of the usual five), this can be a fatal flaw. Basically a single character has no allies to accidentally attack, and if they have enough health, they will never be attacked in retaliation. And most of the hardest bosses in the game can cause confusion.
*** The AI will also never attack a character that has Death Sentence (a status that kills the victim in three turns). There is equipment that block instant kill abilities without negating the above status. So wear the equipment, get the status, and laugh as the AI proceeds to ignore you and die for their ArtificialStupidity.
** ''VideoGame/FinalFantasyXIV'' :
*** There is a certain boss in A Realm Reborn whose normal mechanics can be avoided entirely by using a strategy the playerbase has come to call "Enrage." When the head of the development team found out about it, he stated that the boss was never meant to be killed in that manner, but that he admired the players' ingenuity. Thus, he decided not to do anything about it. When a patch unexpectedly made Enrage harder to use, the devs promptly released a hotfix that allowed it to work again. The strategy works like this: the boss has an intricate series of high damage attacks, but at a certain point it will stop using them to spam an area of effect explosion. This was meant to destroy parties, but instead people found that [[{{Whoring}} you can just bring extra healers for the tank]] and let the dps sit back and whittle the boss to death, because it won't attack them.
*** A multi-part FATE in Northern Thanalan known as Dark Devices begins with the objective being to kill a small group of Cultist Lambs after pushing through masses of infinitely respawning enemies. Players quickly discovered that the huge amount of respawning enemies in a small area was ripe for mass amounts of killing for exp instead of actually advancing the objective. Over the fifteen minute timer you could earn several hundred thousand EXP.
* ''Franchise/KingdomHearts''
** In ''VideoGame/KingdomHeartsII'', the Reflect spell is meant to be your defensive spell used to block enemy attacks and perform a shockwave magical counterattack. However, when cast is midair it will maintain your momentum from your jump, even moreso when used in a [[SuperMode Drive Form]]. This abuse allows a player to spam Reflect to make difficult leaps at much lower levels than were obviously intended.
** ''VideoGame/KingdomHeartsBirthBySleep'', the Sliding Dash ability is a DashAttack and one of the most basic commands in the game available in the first world you visit. However, when used in midair it becomes a substitute for Glide. Usage of a Sliding Dash or two allows the characters to reach out-of-reach treasure chests not intended to be reached until they revisit the world with new movement abilities. Further, many of these chests contain end game deck commands, allowing for a DiscOneNuke by reaching them so early.
* ''VideoGame/{{Suikoden II}}'': A section of the wall between the Muse and Matilda border has accidentally been flagged movable. By pushing it aside, the Knightdom of Matilda can be accessed early in the game. Inside, a sidequest can be completed, two high level characters can be recruited, and the entire party can be levelled from around level 15 to levels in the 30s.
* A particularly well-known example in ''Videogame/{{Quake}}'' and many other FPS games is provided by the rocket launcher. Its intended use is of course to make LudicrousGibs of groups of enemies. Many players instead choose to use it to make massive SequenceBreaking leaps. {{Rocket jump}}ing became an AscendedGlitch for the FPS genre - the Soldier in ''VideoGame/TeamFortressClassic'' and ''VideoGame/TeamFortress2'' is designed for just that.
* ''VideoGame/MetalGearSolidPeaceWalker'': The Sling Post's intended and primary use is as a key component to the Human Slingshot (hence the name). However, the players can also use it in single player mode to [[BatterUp knock the enemy senseless]]. Miller even LampShades the trope by calling the player when doing this and saying "That's not what its used for!"
* ''Videogame/LeagueOfLegends'':
** The Innervating Locket item restored some of your mana and caused a minor self-targeted [[AreaOfEffect AoE]] heal whenever you used one of your abilities. Originally it was thought of as a powerup for healers. Then people realized you could use it on Udyr (a melee fighter who uses his abilities in quick succession). The Locket/Udyr build was so powerful that it forced Riot to remove the locket from the game.
** The Tear of the Goddess. This item gave you a very large mana pool over time. It was originally thought of as a caster item. Then people started to use goddess tear on other characters such as Corki and Ezreal, both high physical damage characters who nonetheless had abilities worth spamming. Riot took note of this and made the Manamune, which is an item for DPS characters that builds from Tear of the Goddess.
** While radically different uses for champions are occasionally found, the champion Gragas stands out for the alternate having massively surpassed the original. He was intended as a [[StoneWall tanky melee fighter]], using his abilities mostly for utility to debuff, disrupt, and initiate. He is basically never used this way, instead functioning as a burst damage mage who relies on his tank origins to make him tougher than most mages. For a long time the Riot Games recommended items focused on completely different attributes than most player recommended builds, until they eventually gave in and completely overhauled them. It went to the point that Riot Games decided to rework his kit to return him back to his root as a tanky melee fighter.
** Sion, a giant berserker zombie with a massive axe, was obviously intended to function as a beefy melee DPS, using his Death's Caress (an exploding shield) for protection in fights and his Cryptic Gaze (a guaranteed hitting ranged damage spell with a lengthy stun) to catch enemies for him to whale on. While he is often used like this, people noticed that both of those skills had high base damage numbers and perfect 1-1 ability power scaling ratios and he became one of the most powerful burst mages in the game. The scaling was later decreased to make this less prominent, and Sion has since been reworked as a high-health tanky fighter.
** The Ability Power builds for [[GlassCannon melee DPS]] champions Master Yi and Tryndamere are considered some of the worst abuses of an alternate build by the developers themselves. Yi has a multi-targeting dash that makes him completely unhittable for a second, Tryndamere has a spin attack that scales with AP, and both have powerful heals that can bring them from almost no health back to fully healed in just a few seconds. Ability Power Tryndamere has been {{nerf}}ed, Ability Power Yi was done away with entirely when Riot removed his AP ratios in his rework.
** Quinn was intended to be a bottom lane [[GlassCannon Attack Damage Carry]], but she gets more play as a top lane bruiser due to her mobility and harassment, as well as her ultimate swapping her with Valor, making her a melee bruiser herself for a bit.
** Champions classified as supports are generally the ones with teammate-helping abilities, like aura buffs, shields, and heals, that could help the team's carry get lots of gold for their items. However, players eventually realized that there was another way to get their carry gold: get them kills. This is why you so often see champions with strong initiation and crowd-control abilities played in the support role, in what are commonly known as "kill lanes."
** Players are intended to start a match by buying some basic items. Instead, many players simply bought around thirteen healing potions and/or a flask and/or several wards. Flasks were made more expensive, and healing potions [[ObviousRulePatch limited to 5]].
** [[FanNickname Blue Ezreal]], a build for a [[GlassCannon lane carry]] featuring several items intended for jungle tanks which allowed Ezreal to [[HitAndRunTactics kite his enemies around thanks to the items giving him on-hit slows, DoTs on all his spells and infinite mana]]. Despite the core item being {{nerf}}ed, Blue Ezreal is still the dominant build for the character, even in competitive play.
** Using placeable vision wards as targets for teleport skills (Katarina, Lee Sin, the teleport spell) or to draw turret fire is a perennial fan-favorite example of emergent utility and depth for these characters. Riot Games briefly flirted with the idea of removing this, but were swiftly met with enough backlash that they settled for simply [[ObviousRulePatch temporarily unstealthing and revealing wards when they were used for such a purpose.]]
** In general, champions are often used in different roles than intended. Sometimes the developers say "eh, close enough" (Diana was intended as a roaming jungler but is played in mid lane as something of an anti-mage), sometimes a {{nerf}} follows (supports Janna and Soraka mid, [[note]]often referred to as battlemage Soraka or Janna[[/note]] or the support Lulu as a DPS[[note]]referred to exclusively as "Machinegun Lulu[[/note]]).
** Several mage-type champions with good autoattacks end up being used as hybrid attack speed characters(Kennen, Lulu) or straight [=ADCs=] (Twisted Fate). They don't strictly deal as much damage as their intended ADC counterparts, but the utility they bring from their spells(most notably stunning) makes for a safer playstyle.
* In ''VideoGame/DefenseOfTheAncients'', there is no such thing as Not The Intended Use. If you can do it, then it is [[GoodBadBugs a feature]]. This includes:
** Denying: Killing your own soldiers before the enemy can kill them so they miss out on gold and experience.
** Pulling: Luring neutral creeps far enough out of their camp to trigger the respawn on them and create duplicates which can then easily be farmed with area effect damage.
** Orb walking: Using attack modifiers such as burning arrows, not by toggling them on but by manually casting each individual arrow. This counts as a spell and therefore ignores Ghost Scepter and does not draw enemy aggro.
** Using [[BloodMagic self damage spells]] to suicide and deny the enemy a kill and associated rewards.
** Bypassing the [[SequenceBreaking backdoor]] protection.
** Killing the fountain turret that normally prevents [[MercyInvincibility fountain camping]]. This is completely unnecessary during normal gameplay, but [[TheDevTeamThinksOfEverything you can]].
** There is a spell that indicates the spot where a target currently is and yanks them back to that point after a short delay. Intended as an offensive spell, it is seeing use as a means of giving your teammates a quick ride to the base shop and back. There has been at least one clear exception to the above rule: Bottle Crowing (using a courier to ferry one or more Bottles between their owners and the Fountain that refills them) has been severely nerfed by imposing a speed reduction per ''empty'' bottle carried - which is a bit backwards in terms of logic. Some exploits go beyond being features...
* ''Franchise/TheElderScrolls'':
** ''VideoGame/TheElderScrollsIIIMorrowind'' featured Alchemy, allowing you to craft potions. The intended use was to craft potions that would improve your skills in combat and dialogue... but it was discovered that by making and drinking an Intelligence potion, you could make better Intelligence potions which you could then drink. After a few iterations, you could easily make potions that made you a PhysicalGod.
** ''VideoGame/TheElderScrollsVSkyrim'' tried to fix the positive feedback loop of making potions that made you better at making potions from previous games by making you unable to craft potions that help with Alchemy or enchant gear with effects that boost Enchanting... but you can still enchant gear to help you make better potions, and also brew potions that boosts enchanting. Along with Smithing, the road to epic level is thus paved by crafting blank equipment, enchanting it with alchemy-increasing stats, crafting potions that boost Smithing and Enchanting... rinse and repeat. The bug that made Fortify Restoration (improve healing magic) potions raise all your stats even more quickly was just icing, really. And after just a few loops, [[ReadingsAreOffTheScale the numbers would go off the side of the screen]]. Later versions of the game created a cap to avoid this.
*** Necromage is a perk in the Restoration tree that increases the effects of all spells on the undead. Situational, but not too bad on its face, given that a great fraction of the toughest enemies in the game are the various draugr lords, dragon priests and vampires. However, it turns out that the word "spells" can actually encompass a wide variety of effects, including Shouts, potions, gear enchantments, some perks, standing stones... And since there AintNoRule saying that only NPCs are affected by the perk, a vampire Dovahkiin (technically undead) can merrily proceed to abuse the perk to become godlike.
* In ''VideoGame/DwarfFortress'', anything trapped under a falling drawbridge is removed from existence. Forget the obvious utility in fortress defense -- 'atom smashers' are best used to delete the tons of waste rock that excavating your fortress produces.
* In the online game ''Videogame/{{Bearbarians}}'', starring feuding tribes of furries, CaptureTheFlag probably isn't supposed to be any more time-consuming than Team Survival, Team Deathmatch or Capture and Control. However, the usual effect that limits shenanigans - your teammates completing the objectives - is [[ArtificialStupidity bugged so that they keep walking nearly to the drop-off and then turning around]], meaning that they only actually score a point when knocked into it by an opponent attacking them. Given that everyone in CTF has infinite lives, and having a time limit is optional, you can thus spend any time period you like LevelGrinding in a way that missions that are actually ''about'' murdering people simply do not offer, so long as you remember to prioritise the guy who just picked up your flag. This will also make you a fat pot of money, since killing 180 opponents in a game where 50 kills is an impressive streak tends to lead to quite large payouts in addition to the level-up that will unlock new things for you to spend it on. It seems very unlikely that any of this was part of the original mission layout.
* In ''VideoGame/PsiOpsTheMindgateConspiracy'', one of your more basic psychic skills is levitating something you're standing on and using it to fly around. The developers originally didn't intend for this to be possible, but once they learned of it, they restructured their levels to accommodate for it.
* Parodied in ''VideoGame/ThreeDDotGameHeroes''' Spelunker mode. Dashing into a wall results in a fake death... and deliberately exploitable invincibility frames.
* In ''Videogame/{{Shank}}'', when using the dual pistols, you can block to reset the pistol firing animation, [[LagCancel allowing you to skip the time-consuming reloading animation.]]
* Secret missions in ''VideoGame/DevilMayCry'' series are usually crafted for testing a certain skill, like jumping, precise aiming or avoiding damage. However, many of them can be easily passed by using some legitimate ability that was not intended to be used in that mission. Examples include:
** Using a certain weapon's special ability to fly over a timed TemporaryPlatform path.
** In a mission that requires you to kill a group of {{Puppeteer Parasite}}s [[EscortMission before they can take over a regular foe]], you can grab the escorted creature and carry it to a place the enemies can't reach.
** ''[=DMC3=]'' and ''[=DMC4=]'' have the infamous "jump-cancelling" technique which involves pulling off air and ground combos, jumping off of the enemy (therefore resetting the combo), and repeating the technique allows you to keep the Style Counter and combo going without immediately dropping.
* "Spawn Trapping" in competitive shooters. By exploiting bad level design, one team can win by preventing the other from ever advancing out of their spawn area. This is very noticeable in places like ''VideoGame/CallOfDutyBlackOps'''s Demolition mode (where both teams have two fixed spawn points and is the source of the infamous 500+ kills video) and ''[[VideoGame/BattlefieldBadCompany Battlfield: Bad Company 2]]'' (which makes the area around the other team's spawn point a soft-kill zone, but there are often terrain features that allow restricted lines of fire and blind corners ripe for camping). ''VideoGame/TeamFortress2'' implemented counters to this strategy, such as Spies (who can leave the spawn unnoticed and take down the campers, unless the campers are Pyros ''which they usually are''), ''Bonk!'' (A secondary for Scout that makes him invulnerable but unable to attack for 8 seconds) and Ubercharges (which let the "besieged" take the enemy down while invulnerable).
* When a monster is killed by attacks from several players in ''VideoGame/RagnarokOnline'', the EXP is split between the intervening players, then boosted according to the number of them. This was intended to make group play more rewarding and enjoyable. However, this boosting always occurs, even if the players were never in the same party to begin with. The next logical step is, of course, travelling with your character to [[PeninsulaOfPowerLeveling popular leveling spots]] and beating the resident monsters within an inch of their lives, never killing them. When another unsuspecting player finished them off, you would easily receive between 2 to 6 times the normal amount of EXP the monster was worth.
* ''VideoGame/RatchetAndClankFutureToolsOfDestruction''. Hoo, boy. Combining JumpPhysics, GoodBadBugs, and a little DungeonBypass know-how, the Razor Claws allow a player to not only [[http://www.youtube.com/watch?v=2y_zFsaBjUQ climb walls]], but essentially [[http://www.youtube.com/watch?v=5kEloEfid2c FLY IN MIDAIR]] by boost jumping with the heli-pak. The details are a bit much to explain, but the tricks are easy enough to pull off to keep this out of the Alternative Skill range, as all a player needs to do is know how a level is shaped/designed (which you probably do know, unless you plan on doing this the first time you ever play through the game), climb over a wall, and glide to the end, or walk over the entire level's ceiling.
* ''VideoGame/JetSetWilly'' had a [[SequenceBreaking sequence break]] available with a trip to the game's version of MinusWorld; if you travel out of a room in a way the game hadn't anticipated (e.g. right through an impassable wall, or up through an unreachable ceiling, etc), it warps you straight to Room 0 in the room table, "The Off Licence". Given the difficulty of traversing "The Bridge", "The Drive" and "At the Foot of the [=MegaTree=]", compared with the ease of reaching the ceilings in "The Watch Tower" and "Rescue Esmerelda", this is by far the easiest way to get there.
* ''VideoGame/DJMAXTechnika'': The game's way of handling chain notes and tap notes is very loose:
** Each point of a chain note is counted as a separate note, and you're only scored for how well you time each segment. As such, you can actually tap individual points of chain notes instead of dragging them. This normally qualifies as an Alternative Skill, although there are some segments where tapping can be easier (and less blister-inducing) than dragging the notes, such the zigzag chain notes in charts like Fury (Hard) and A.I. (Hard).
** The game does not distinguish between tapping a note to trigger it and dragging your finger from some other lane onto the note to do so. As such, you can drag individual tap notes as long as they are not on the same lane, which makes charts like Voyage (Normal), [[WakeUpCallBoss Airwave (Hard)]], and [[ThatOneBoss Thor (Hard)]] easier.
* ''VideoGame/{{Touhou}}'':
** Marisa B's Illusion Laser Glitch on Mountain of Faith. The only thing you had to do to pull it off is to have Marisa's Illusion Laser formation in a power level between 3 and 3.95 and play unfocused. In exchange, you could practically skip all spell cards that were not survival-oriented. Then again, Imperishable Night granted us Malice Cannon, which consisted on just tapping the focus button to alternate between Alice and Marisa, yet it dealt devastating damage to anything it touched.
** Several patterns have safe spots where you can sit without fear of getting hit. Safe spots that are generally barely larger than your hitbox and entirely unmarked (Cirno's Memetic Dumbass image comes in part from having [[http://www.youtube.com/watch?v=iY_e-WoVIqU a glaringly huge one]])
** Forgiveness "Honest Man's Death" can be cleared in one of two different ways. The [[http://www.youtube.com/watch?v=11DB2ZhCTC0&feature=related relatively simple method]] involving minimal movement to avoid a simple laser, or [[http://www.youtube.com/watch?v=dxww4UGdWiY&feature=related nausea inducing circle]] around the boss that, technically speaking, bypasses most of the difficulty.
* Exploiting the WreakingHavok physics in ''VideoGame/BanjoKazooie'' Nuts And Bolts to fly. To do this, find one vehicle parts crate [[note]](or anything flat and grab-able, really, but the parts crates are ubiquitous)[[/note]], put it on your trolley, then pick up the trolley with your wrench. The player can lift himself up by his bootstraps and get a lot of rare parts early.
* Using the 2 Player B mode trick in ''VideoGame/DoubleDragon 2'', though only to an extent. It only gives you a few extra lives and you get attacked by more enemies throughout as a result of having picked one of the two-player modes.
* There are a number of examples in the ''Franchise/{{Metroid}}'' games (some covered under SequenceBreaking). One of the best is the dash-jump in ''MetroidPrime''; intended for dodging, it turned out to be incredibly useful for platforming. Its most dramatic use was in getting the Space Jump immediately after landing on Tallon IV, which breaks the game wide open. The rereleases made this trick harder (though not quite impossible), and the dash was {{Nerf}}ed somewhat in the sequels.
* ''VideoGame/MarioKart'':
** Snaking in ''VideoGame/MarioKart DS''. It does give you an advantage, but most of the time, it's easier to memorize the circuit than learn to snake. Most people snaked in the game when it came to online so you had to do it as well if you wanted to have a shot at winning.
** ''Mario Kart Wii'': Popping a wheelie with bikes. The mechanic of the wheelie is you get more speed while being hit slows you down greatly as a trade off. The mechanic was intended to be used on long and straight roads, but people started to pop wheelies anywhere as long as they weren't turning a corner. This resulted in everyone flocking towards bikes and abusing the wheelie mechanic, which put karts in the dust since their mini turbos weren't powerful enough to keep up with bikers that popped wheelies everywhere. Bikes were not included in ''Mario Kart 7'' and while they returned in ''Mario Kart 8'' the ability to do wheelies was removed.
** There's a sort of meta-strategy that's used online to avoid the dreaded Blue Shells by abusing how the mechanics of that item works. The said item always target the player in first place, so in games where you can check what items other players are carrying, players in first who see someone that has it will deliberately hit the brakes and let the player behind them pass and take the hit. If there's no one else nearby, then people will often choose to jump into a nearby pit instead, since you can at least get a quick speed boost after getting placed back on a track, but getting hit by a shell takes much longer to recover from. It's unlikely that the developers intended for the item to cause players to go to such lengths to avoid it. People who get the infamous item also began to use another trick with it by never using it at all. Since Mario Kart DS and 7 lets you see what item everyone is carrying, people will try to do everything they can to make sure they are not the target of the spiny shell. However, a player that holds onto the shell instead will have control over the race since he can use it at any time he wants and the others know of it, turning the entire pack into a game of cat and mouse.
* Skilled ''VideoGame/{{DOOM}}'' and ''VideoGame/{{DOOM}} 2'' players used Strafe Running and Wall Strafe Running. The former allowed for a [[DiagonalSpeedBoost 44% increase in speed when running diagonally]], the latter allowed for an over 300% boost if done just right along a wall.
* Using the infamous Prehistoric "Tower/Prophet" turtle in ''VideoGame/EmpireEarth''. For the most part, the strategy is perfectly legit, except for the fact that it exploits the finiteness of food in the prehistoric epoch and the fact that prophets start off already at full power in the prehistoric epoch, versus other units that start off weak.
* In ''VideoGame/MassEffect1'', the [[CoolTank Mako's]] usefulness in combat decreases sharply the more levels you gain. Eventually, players will inevitably handle outdoor firefights by ''getting out of the heavily-armored armed vehicle'' and instead [[TakeCover using it as cover]]. Conveniently, the Mako can't be destroyed if you're not in it. The Mako can also be used to GoombaStomp large enemies like geth armatures, leaving them pinned to the floor and mostly unable to fight back when you get out of the Mako to shoot them to death on foot.
* ''VideoGame/MassEffect2'': A technique known as "checkpoint dashing" can be used to circumvent difficult sections of a level. Many checkpoints exist physically in the game, and trigger as soon as the player reaches them. As such, the player can simply rush through a section to trigger the checkpoint, die, and continue from the next scene without any enemies hounding them. In a few places, you don't even need to physically be at the checkpoint; if you manage to spawn a combat drone close enough to the checkpoint, the cutscene will still trigger.
* ''VideoGame/MassEffect3'' frees up weapon restrictions that were implemented in ''2'', meaning than any class can take any weapon they want, such as [[SquishyWizard Adepts]] wielding {{Sniper Rifle}}s, or [[DeathOrGloryAttack Vanguards]] with assault rifles. One of the most notorious combinations is an Infiltrator armed with a [[ShotgunsAreJustBetter shotgun]]. Using their [[InvisibilityCloak Tactical Cloak]], Infiltrators can get close to enemies without being detected and decimate entire squads without suffering from the obvious drawbacks of the ShortRangeShotgun. It became something of an AscendedMeme when one of the Multiplayer characters gained a variation of the ability, wherein the user could potentially gain a boost to shotgun damage when [[DramaticGunCock uncloaking via attack.]]
* The Infinity feature in some official ''Tetris'' games, which allows you to move or rotate a piece as many times as you want while it is on the stack or floor before locking it in place. Careful planning is still needed to be able to, for instance, [[{{Cap}} max out the score]], but Infinity gives you as much time as needed.
* [[VideoGame/{{Tetris}} Tetrisfriends.com]] uses the SRS rotation system, which allows the player to pull off T-Spins, which in turn are ways of filling a row with a T block that could not be slid in under normal circumstances. Tetrisfriends also implements a back-to-back bonus system (which rewards for pulling off Tetrises or T Spins the same maneuver twice in a row), as well as a combo system for clearing several lines one after the other with each tetromino that falls down. By planning out all moves carefully, one can reach ludicrous highscores in Marathon mode by manipulating these bonuses. As a result, the top twenty or so of the All Time Top 100 are playthroughs that used very few doubles/triples... and 0 Tetrises. ''In a game bearing the official logo of Tetris.'' (Explanation: A Tetris ''does'' score more points than a 4 line clear combo, but a tetris deducts 12 lines from the maximum lines you can score before clearing a Marathon. 4 lines in quick succession do not deduct bonus lines, and T-Spin Triples have a better score/line deduction ratio)
* Having trouble getting the right times in ''VideoGame/Left4Dead'''s Survival mode? As most of the survival maps are just portions of a campaign, it is entirely possible to get OUT of the survival area and hole up in a place where the zombies aren't coded to look for you. This can take many tries to get right, and frequently involves an understanding of how the physics engine works.
* ''VideoGame/MortalKombat9'' has the teleport-spam and projectile spam methods of beating [[SNKBoss Shao Kahn]]. However, they aren't 100% effective and one needs to watch for his super armor to activate, at which point one needs to evade him at a moment's notice.
* In ''VideoGame/HaloReach'', it is possible to use the exit animation on the forklift to clip through certain walls, skipping difficult segments of the game.
* In the ''VideoGame/{{Starcraft}}'' Protoss Campaign mission 5, it's possible to win in under 5 minutes by using hallucinate to make illusion clones of a transport ship, load Tassadar and the two zealots into the real one, and then fly them straight to the Zerg base-defended beacon they're supposed to be unloaded at to win the mission. To say nothing of mission 7 in the Terran Campaign, which can be beaten in less than 30 seconds just by casting Defensive Matrix on the SCV carrying the beacon and rushing to the objective. Similarly, in ''Starcraft: Brood War'', in mission 6 of the Terran campaign, it's possible to win even without landing your buildings, by simply loading the siege tanks you're provided with at the beginning and flying them up to the corner of the map and let them rain destruction on the command center you're supposed to go through a base to destroy.
* ''VideoGame/StarcraftII'' has an in-universe example in "The Dig", in which a ginormous laser drill used to cut through several very resistant doors turns out to be remarkably effective at quickly destroying otherwise hard-to-kill units and structures.
* [[http://www.gamefaqs.com/mac/563138-warcraft-iii-reign-of-chaos/faqs/18406 This Warcraft III walkthrough]] details a very advanced strategy to win the final mission of the base game's campaign. Normally, you have to survive the onslaught of the relatively overpowered enemy for 45 minutes while they attack and destroy you and your two allies bases in succession. This is completely feasible as you have plenty of resources available, some free mercenaries, and can of course construct your own defences inside their bases to turtle the 45 minutes out. The walkthrough's strategy however, involves exploiting the fact that when the enemy razes one of the bases, it destroys its old one completely and replaces the razed base with a new one. This is done by knocking down the trees around the first base, hiding lots of siege weaponry and some flying units there, taking out the human main building thus triggering the base raze and replace, followed by knocking down the new buildings with the hidden units while using CrowdControl units to keep the overpowered enemy heroes from interfering. Once you've kept them from getting their new base up, the only way to lose is to destroy one of the remaining bases yourself.
* In ''VideoGame/DiddyKongRacing'', the characters are balanced with high acceleration/maneuverability and low top speed on one extreme, and the polar opposite on the other. However, it turns out that tapping the accelerate button rapidly lets one ignore the top speed limitation, effectively turning the former types into masters of all three. It's a common strategy for beating the more difficult races without switching to an innately faster but harder to control character.
* By [[JumpPhysics timing repeated jumps perfectly]] in ''VideoGame/HalfLife'' games, Gordon can accelerate to ridiculous speeds and leap hundreds of feet through the air. This physics-engine oddity is, of course, constantly exploited in {{Speed Run}}s. It is also possible to use Snarks (tiny throwable bugs that chase creatures) as a ladder. This extends to games that use the same engine, such as ''VideoGame/TeamFortressClassic''. The TFC Medic and Scout also have a concussion grenade which was intended to be thrown at enemies to [[InterfaceScrew mess up their aim]], but instead evolved into a powerful mobility tool that the player can use to launch themselves across the map.
%%* ''VideoGame/{{Painkiller}}'' has a similar deal, which is needed to get some secrets. (Please explain this example by its own merits and not merely in comparison to another example)
* ''VideoGame/PAYDAYTheHeist'':
** Being released from police custody puts you back in the game with full health and ammo (sometimes you come back with half of your max ammo instead). On [[HarderThanHard Overkill1 145+ difficulty]], players who are low on health and/or ammo may deliberately go down and be captured in order to be exchanged later on and get a free health and ammo refill, which saves the use of the limited ammo and doctor bags. A similar phenomenon happened in the sequel regarding Cloakers. Normally, every time you go down, it counts as one "down" and if you go down 4 times without healing in between, you get put into custody. Getting downed by a Cloaker's kick attack does not count towards one of your downs and your health is cut down to half when you're revived. However, if your health is below half, your health is then restored back to half after you get revived, which means you might be better off getting downed by a Cloaker to save the use of a doctor bag.
** The ARG event that went on for a short time forced players to play on Overkill 145+ and wait ''two hours'' to gain access to a secret vault. Rather than fight the cops normally, players chose to hide inside small alcoves within the walls, which caused the enemy AI to get confused and/or stuck, but still allowed a few cops to trickle in and attack. Since players had to send video footage of their attempt at the vault to the developers, the developers did take notice of the exploit and stated it was fair game since the players were still at risk of being attacked by the cops.
* In ''VideoGame/{{Prototype}}'', the various Events, save the timed race ones, required you to kill a certain amount of enemies in a specific time period in order to achieve a better medal. The game advertises that you should target the ones marked on our minimap, but any member of the targeted faction (military or infected) is a valid target. As it is quite impossible to achieve gold and platinum without exploiting this, the claim is likely intentionally misleading to force the player to think outside the box. However, they probably didn't take into account that any tanks you've stolen still count as valid military targets even if no one is driving them, allowing you to park several in a row for military missions and artificially inflate your score a good fifty points, making the medals trivial to earn.
* In ''VideoGame/TheLegendOfZeldaALinkToThePast'', jumping in water before getting the Zora's Flippers drops Link back where he was before he jumped in the water and gives him MercyInvincibility... without actually damaging him. This makes wandering around in areas near water a lot easier; just jump right on in before you get hurt. Getting through Zora's River is made much easier with this exploit, though admittedly it's the last possible place you can use it (Zora's River is the very place you get the Flippers that cancel the exploit, which are themselves necessary to complete the game). Later Zelda games that require Flippers to swim either damage Link when he falls into water or drop him off at the beginning of the room (or both).
* Half the fun of the ''VideoGame/{{X}}-Universe'' series is finding bizarre ways to use things that Egosoft never considered. The ''Truelight Seeker'', a fairly mediocre corvette that can mount almost every gun in the game, [[LethalJokeCharacter seems like a goofy gimmick until you realize]] it can mount Gauss Cannons, capital-ship-grade weapons that rely on ammo instead of the ship's reactor. The Blastclaw Prototype heavy fighter frequently [[MundaneUtility doubles as an external cargo bay]] for the Hyperion. And we can't forget [[WeaponizedTeleportation station-bombing]], making use of the game's RidiculouslyFastConstruction to build cheap stations ''inside'' enemy warships.
** Before the introduction of tractor beams in ''Terran Conflict'', the only accepted way of moving an asteroid from one place to another was to get a huge ship and very patiently nudge it in position by repeated small collisions. A more risky alternative was to get a very fast ship and piledrive it into the asteroid; the wacky physics sometimes caused the ship to survive and the bigger object to be propelled a fair distance away. Plenty of SaveScumming was usually required before the desired effect took place.
* The "Flee" ability in ''Videogame/WarhammerOnline'' is most of the time used to get from point A to point B faster.
* The "Charge" ability -- and other similar ones -- are often used to get around quicker in ''Videogame/GuildWars''.
* In ''Videogame/GuildWars2'', skills that include long forward jumps or teleports can be used to circumvent the more frustrating parts of jumping puzzles provided a character has enough resources to pull it off.
* ''Videogame/PerfectWorld'': The Cube of Fate, a bonus level, can be entered via any major city, but when you exit it, you end up in Archosaur, no matter which city you entered from. As such, it is most often used as a free teleport to Archosaur.
* ''Videogame/CityOfHeroes'':
** Ouroboros is an AlternateDimension zone that lets you use TimeTravel to play lower-level content you may have missed. Ouroboros can be entered from anywhere, and has exits to some of the major zones, so it's used mainly as a method for rapid travel. The portal itself could be created in mission areas, allowing characters a quick exit in missions that otherwise would require them to manually exit.
** The invention system allowed players to turn their characters into {{Game Breaker}}s, albeit taking considerable amounts of money or luck to get them there. One particularly effective path involved boosting your recharge to insane levels on a melee character with click-based defensive powers such as [[HealingFactor Regeneration]], allowing them to [[LightningBruiser spam high level offensive and defensive abilities that would normally take considerable time to recharge]]. Especially notable was Domination, the Dominator archetype's inherent power. In normal play, you would charge your Domination bar with attacks, and once full, you could activate it to enjoy certain useful bonuses, and then the bar would be emptied... unless you stacked enough recharge reduction so that Domination recharged before it expired, at which point you could use it again, since the bar was still full. End result, the bar never emptied, as long as you exploded into a colorful burst every minute and a half.
* ''Videogame/UltimaOnline'' has the gate travel spell. Opens a blue portal from where the caster is standing to wherever the caster chooses via previously marked rune. So far so standard, except players figured out that since the gate didn't appear directly where the player was standing but in a random spot next to the player they could open a gate that intersected the door of a player house, allowing people from the other end of the gate to come through into the house, looting all it's contents.
* ''Videogame/MapleStory'' introduced characters with specific skills that let them warp to a special map. Presumably this was intended to make job advancement and storyline quests easier. However these special maps are always in either Victoria Island or Pantheon, and Victoria Island has a warp to Pantheon smack-dab in the middle. Pantheon has a warp to nearly ''every town in the game'', so it's ridiculously easy for any player with one of these skills to never have need of a ship. Ever.
* ''[[VideoGame/DonPachi DoDonPachi Saidaioujou]]'' has the Hyper recharge technique. Normally, defeating a midboss, boss phase, or certain types of enemies turns all on-screen bullets into small star items. But during a Hyper, cancelled bullets turn into large star items, which are worth 10 times the usual small ones. However, items picked up during a Hyper don't charge up your Hyper gauge. This can be exploited by triggering a bullet cancel just as your Hyper times out, spawning a screenful of large items which ''do'' charge up your next Hyper because your previous one ended before you actually pick them up. Since this is much easier said than done (you only have a brief window to pick up a spawned star item before it falls off the screen), it became a high-level technique and turned into an AscendedGlitch: The Xbox360 port actually includes a demonstration video teaching you how to do it, and in Ver 1.5, a Level 6 or higher Hyper turns ''all'' star items spawned into large ones plus higher levels above 6 increase the number of large star items spawned, making this exploit possible in more places than before.
* The mine-laying corvette in the first ''VideoGame/{{Homeworld}}''. Intended to simply defend an area of space, it becomes a devastating ''[[OneManArmy fleet-killer]]'' when you know the direction the enemy is coming from. A squadron of these makes the final two NintendoHard levels very easy, easily destroying the [[ColonyDrop asteroid with an engine]] shot at your mothership in the second-to-last level while the fleet takes on the asteroid's escort and blunting the simultaneous attacks of enemy squadrons in the final battle.
* Both ''VideoGame/{{Trine}}'' games have as a playable character the Mage, who can summon platforms out of thin air and levitate objects. Summoned platforms can of course be levitated, but if the player is standing on one the levitation effect stops as soon as the game detects significant movement. Emphasis on ''significant'': if the player spawns a cube or platform, jumps on it and proceeds to ever-so-gently levitate it around, the game won't register the movement as such. As a result, the only thing stopping a player from completing the entirety of the game by very slowly floating through the levels is lack of patience -- but this still allows for cheating your way out of particularly tough puzzles.
* Microsoft probably did not intend for the Kinect to be used to [[http://www.theregister.co.uk/2012/05/28/sstl_strand_2_nanosat_xbox_kinect/ dock satellites in space.]] The Kinect is more notable for its uses outside of gaming that in gaming, being used in everything from robot navigation to scanning dig sites.
* ''VideoGame/SuperSmashBros'':
** Being a platforming fighting game where you have to avoid falling off the edge of the screen, being able to get back to the stage if you fall or get knocked off is important. Every character has a double jump, and an upwards special move that is used for attacks but mostly as a makeshift third jump. This is intended. The drawback to using the third jump is that afterwards the character is unable to perform any action besides moving until they either A: hit the ground/grab a ledge or B: get hit. Naturally, people have found ways to abuse the fact that taking damage essentially gives you a fourth or higher jump. Examples include:
*** Purposely getting hit by an attack or projectile that was happening close enough.
*** If in a team based mode, have a teammate throw an explosive item since they can still hurt teammates (though this is very risky and has a high chance of team kill), or if Friendly Fire is turned on, simply have the teammate attack you.
** More character specific examples include:
*** [[Franchise/TheLegendOfZelda Link, Young Link and Toon Link]] can pull out a bomb for their downwards special. They count as items and thus any normal attack will cause them to throw it instead, but the game allows you to perform special moves with an item, thus allowing them to pull the bomb out and then perform their upwards spin attack. The bomb detonates after a while even if you're holding it, and does negligible knockback and damage, so once it explodes and you take damage, you're free to perform another spin attack (or pull out another bomb, though it might take too much damage and you probably already made it back to the stage, and if you didn't it might take too long causing you to fall off)
*** [[Franchise/MetalGearSolid Snake,]] to make up for the fact that his upwards special deals absolutely no damage and can't even be considered an attack, CAN perform actions after using it, just not another upwards special. Until he gets hit. At which point he can do it again. He also has a C4 charge as his downwards special, and it can very well hurt him. The trick here is to use his upwards special, wait 'til it finishes, drop a C4 charge, fast fall to catch up with it if need be, detonate it and then use another upwards special. It helps that the C4 charge [[RocketJump may also propel you upwards]]. This is very powerful, and also leads to an alternate game mode using the LevelEditor to create a stage that Snake can go under and infinitely use this tactic, and have two Snakes dogfight while using this.
*** Franchise/MegaMan's Down Special, Leaf Shield, creates a shield that absorbs projectiles, damages nearby enemies, and can be thrown as a projectile, but Mega Man can't use almost any other attacks while the Leaf Shield is active. Just by looking at this move, you'd think it's best used defensively, and while players dismissed it as a situational and mediocre move initially, people then discovered that it can be used with a grab to deal a good amount of damage with it, and is even better for edge guarding by hitstunning them and screwing up many characters' recovery. Footstool jumping with the Leaf Shield gives Mega Man an easy way to KO opponents, which covers for Mega Man's low damage output.
** The hitboxes in the game are tied to the character model. So an animation that has a character lean back or crouch slightly may cause them to just barely dodge an attack, or just barely get hit by it. This is extremely unreliable, however.
** [[Franchise/{{Pokemon}} Lucario]] has a special mechanic that causes him to become more powerful the more he gets hit. Thus, many players [[http://awkwardzombie.com/index.php?page=0&comic=042808 purposely take damage]] in order to have insanely powerful attacks.
** Multi-Man Brawl mode has you take on a horde of cpu-controlled {{Mooks}} with only normal moves and the inability to grab ledges so as to make killing waves of them easier. You can try to ledgehog to try to bait some of them into falling off, but they'll catch on quickly and use downwards hitting moves to get you. The game also introduced Tether recoveries, which previously existed as a way to hang onto walls for Link and Samus, now homes directly towards ledges and lets you hang on without much effort for Link, Samus, Zero Suit Samus, Toon Link and Ivysaur. If this is used in Multi-Man Brawl, the mooks will just stand at the ledge waiting for you to go up before attacking. However, there's a lot of them so you can just hang there and watch as they try to be the one closest to you and subsequently get pushed off, and then take advantage of the split-second invincibility offered by hoisting yourself up followed by the general invincibility of ledge attacks to knock a couple more mooks off, then return to your previous position as they scramble to get back to the stage. Rinse, repeat.
** When you have no lives and have the match on a time limit, a way to defeat enemies while playing as Kirby is to suck them up, then jump off the edge of the stage, committing suicide and taking the enemy with you. This trick is referred to as Kirbycide. Additionally, Bowser's side special can be used for something similar if you manage to grab an enemy near a ledge.
** Air dodging and Wavedashing. By air dodging diagonally downward into the ground, the character slides forward very quickly, and rapidly alternating between jump and diagonal downwards air dodging is vital in competitive play. In fact, this is seen as the only real use for ''Melee''[='=]s air dodge, as it's not very reliable for its intended use (a half-second of invincibility) as it puts the character in a helpless state after it's executed. It was for this reason that the air dodge was revamped in ''Brawl'' to be much more useful for its intended use (probably [[GameBreaker too useful]]).
** In all games, stale-move negation acts as an anti-spamming feature, reducing the damage of spammed moves encouraging players to use a variety of moves to attack. ''Brawl'' strengthens this mechanic by having it reduce the knockback with progressive use (which wasn't present in previous installments). However, since moves with less knockback are easier to combo with, ''Brawl''[='=]s stale-move negation is instead used to create even ''deadlier'' combos, especially when the spammed attack is a [[FinishingMove Smash Attack.]]
* ''Franchise/FireEmblem'':
** The series has the Rescue staff. As the name implies, it can be used to rescue characters in trouble. The way it does this, however, is by teleporting the unit the staff was used on to a space next to the unit. You can also use this as a simple teleportation staff by moving the staff user somewhere you want the teleporter to be and then "rescue" them from that position. This can be used with the Warp staff, which is actually used for teleportation, usually by warping a staff user somewhere and then having them rescue the next person you want in that location, thus giving you two units in that position.
** ''VideoGame/FireEmblemAwakening'' introduced the Pair-Up mechanic, which replaced the rescue mechanic, and allowed two units to occupy one spot. The intended use was to help more mobile units ferry less mobile units, have weaker or in-danger units take refuge with a safer unit as they won't count as an active unit anymore or to just plain get higher stat bonuses from teaming up. It can also be used to be able to move one extra space if needing to get somewhere real fast. This can be done with two units of the same mobility, have the one farther from where you need to go pair-up with the one closer, and have that one move, then drop the first unit off in front of him. On the next turn, have him pair-up with the first unit, have the first unit move and then drop the second guy off. Since you can switch which character is in the lead before drop-off, you can also do this to help when having a less mobile unit travel with a more mobile unit. It's the same strategy, only you switch so the less mobile unit is in the lead and have them drop the more mobile unit off so that it's the more mobile unit carrying the less mobile unit each turn.
** Abusing the pair-up mechanic can also be used to have two characters traverse most of the map in a single turn. Both units must have the ability Galeforce, which is a GameBreaker as it is as it lets a character move again in the same turn once they kill an enemy. If two units with Galeforce pair up, the character in the lead can move and kill an enemy. Once dead, Galeforce activates letting the unit move again. But it's a paired unit, meaning there are two carriers of Galeforce, so once you move to the next enemy, you simply switch the lead character and have them kill the enemy, causing a second Galeforce to activate and thus, a third turn, letting you move even further. This is done to great effect if at least one of the characters is a flying unit, or has any of the movement enhancing skills.
** And, of course, these can be used in conjunction with the Rescue staff to make moving even easier, though ''Awakening'' doesn't have the Warp Staff.
** The Blossom skill in [[VideoGame/FireEmblemTellius the Tellius games]] increases a characters stat growth rates at the cost of halving their Exp gain. Its intended use was to help weaker characters gain stats more quickly, but [[SpeedRun speedrunners]] use it for the exp-halving effect, since watching the Exp bar fill up wastes time.
* The Danger Mario set-up in ''VideoGame/PaperMario''. Combine equipment that gives you attack boosts when you have low HP, and equipment that lowers your HP to the point of being low and not leveling up the HP stat, you get a Mario who's always powerful. Every attack in the game can be avoided, so low HP isn't a problem.
* ''VideoGame/StarWarsTheOldRepublic'' has a few whoppers, especially during their special events.
** There's one [[GottaCatchThemAll datacron]] on Tatooine that is ''supposed'' to require a suicide run through enemy territory. The best way to get it is to sneak through the little-used free-for-all PvP area and avoid the enemy base.
** Doing a particularly nasty Heroic (party mission) that is set in an open area? Well, the party limit is 4 people, but it doesn't mean that ''two'' four person parties (or several two person parties with companion bots) can't team up and kill the boss twice. Say Party A is fighting a Champion-level boss solo. Party B waits a couple seconds and joins in. Party B will get no actual credit for the fight, but they can damage or tank the boss along with Party A. Boss respawns, and it's Party B's turn to start the fight while Party A helps. It doesn't matter if there's a vast level difference between parties or even if the parties are in the same ''faction.''
** Doing the Bounty Contracts and you need the target dead while your pal needs the target alive or you're after the same target, but different levels (the bounty target spawns at the level of the highest party member)? Break party, trigger the fight twice so you both get the outcome you need (especially useful for healers, as they won't get credit for the kill, but they won't get attacked, either, leaving them to keep allies alive without being bothered).
** The Return of the Gree event was a first-rate case of it, though; hoping to trigger more interest in open world, free for all PvP, they set up an area just for that, and placed obstacles needed for the event's daily PvE quests in there to entice people. However, the obstacles in the PvP area were half-difficulty. Queue server-wide ''truces'', Imperial and Republic players cooperating on the obstacles, orderly lines for a drop-off puzzle, and veteran MMO players scratching their heads, saying they had never seen anything like it.
** Jedi Shadows and Sith Assassins get an ability to throw down a teleport puddle around level 55. It's intended use is for healers to stand in (it boosts healing output for those standing near it) or evade a boss's area attacks. But it can also come in handy when hunting hard to get datacrons or treasure chests as you can teleport back to safety and save yourself from a fatal fall (and having to do it all over again from the beginning) if you're quick on the draw.
** Falling off a cliff or other high spot kills the character and gives a quick transport to the nearest medcenter, but if they aren't in combat, the damage to gear is negligible. Players can complete a quest, then jump off a cliff (or in one case, ''into a sarlacc'') to get a quick transport back to base for turning it in.
** The "/stuck" command is designed for teleporting a character to a safe spot if they hit a bug in the environment. If you are in combat (say you got stuck in a rock wall running away from a boss), it kills you and sends you to the nearest base with a reduced cost to your armor repair. Endgame operations players figured out about the reduced cost and use the "/stuck" command if the boss battle is going to be a wipe, which ends the fight and saves cash on repairs.
** Stealth classes (Shadows, Assassins, Scoundrels, and Operatives) could flagrantly abuse the ability by sneaking right into an enemy camp or base and just having a look around. If you got too close to an enemy player, you could get discovered and dogpiled by them and every NPC in the place, but most NPC characters were fairly oblivious if you kept enough distance.
* ''VideoGame/MoonbaseAlpha'' was published by NASA as a realistic simulation of maintenance of a lunar outpost. But people ended up playing it just to hear the chat system's text-to-speech option say silly things like "aieou" and "John Madden", and even ''[[http://www.youtube.com/watch?v=Kv5m3oOT3aI sing]]''.
-->''"[[https://www.youtube.com/watch?v=3nxpN4oCk7I It's not gay]] [[Creator/AchievementHunter if it's on the moon.]]"''
* In ''Franchise/{{Pokemon}}'':
** Leveling up increases both max HP and current HP. Result: Rare Candies, which automatically level up a Pokemon, can revive fainted Pokemon, albeit at only a few HP. This also works when evolving Pokemon using an evolution stone. However, since Rare Candies are rarer than Revives, some players prefer saving their Rare Candies for a ''different'' unintended use: leveling up with Rare Candies is one of the easiest ways to get sufficient data to determine a Pokémon's hidden stats (called [=IVs=]). Use the candies to level a freshly-caught or -hatched Pokémon a few times, plug its new stats into an online IV calculator, then reset the game afterward so you still have Rare Candies to use on the next Pokémon whose [=IVs=] you want to figure out.
** The Global Trade System (GTS) is supposed to be used to trade Pokemon with other players around the world. However for a player with two copies of compatible games it can also be used to "trade" with yourself to easily transfer items and perform [[SocializationBonus trade based evolutions]] without needing a trustworthy person or a second game system. In one game simply put up for trade something so common that no one will pick it up (any ComMon works just fine) and request for something specific you know is in the second game. Load up the second game, attach an item if needed, initiate the trade and pick up your new item/evolved Pokemon in the first game.
* In ''[[VideoGame/{{Battlefield}} Battlefield 2]]'', it's possible (though often impractically difficult) for a team's Commander to crush enemy soldier with supply crates. When a patch added airdropped cars intended for getting stranded teammates back into the fight, it didn't take long for Commanders to instead use the cars as "cartillery" to much more easily crush soldiers -- or worse, dropping them on enemy planes or runways to make the planes crash. An ObviousRulePatch made airdropped cars impossible to place on runways and randomly deviate a few meters from the target, making cartillery all but impossible.
* ''VideoGame/TeamFortress2'' has a few:
** The Rocket Jumper and Sticky Jumper are ostensibly training items--they are painted bright orange and deal no damage whatsoever to the player or their foes. In theory they are used to allow novice Soldiers or Demomen how to explosive-jump without killing themselves. In practice, people have used them to turn two somewhat slow but powerful classes into high-speed terrors, usually armed with {{Situational Sword}}s like the Market Gardener (deals critical damage when rocket jumping) or the Ullapool Caber (a stick-type hand grenade used as a melee weapon, itself an example of this trope) to brutalize one or two opponents, then rocket away out of danger. They were also abused so much in CaptureTheFlag style game modes that they eventually had to remove the ability to carry the briefcase from players using these items. When these weapons first came out, they were also indistinguishable from their stock counterparts, meaning that in addition to the improved mobility, they could be used to fake out enemies into a retreat.
** Cloaking and disguising are the common tools of the trade for the Spy, and are usually used to get behind enemy lines relatively undetected. Used in the Mann Vs. Machine mode, however, it can be used to directly stop the progress of the robot hordes...by standing in front of the bomb carrier. It's possible to block an entire chokepoint with disguised spies and watch the bots futilely stand and jump in place.
** The original Equalizer. In theory, the weapon was an emergency tool to pull out when wounded that would increase the Soldier's speed and striking power as he was injured, allowing him to [[DesperationAttack fight his way out of a pinch and escape]]. In practice, it was an all-purpose tool for any situation. Offensive players would damage themselves with rockets, then go racing to the enemy spawn and start breaking faces, since the weapon's original damage values were enough to kill 5 out of 9 classes in a single non-critical blow (and ''any'' class in a critical swing). Even nerfing the damage did nothing to limit the tactic. Defensive players could use it to run away from a losing battle with impunity; the second-slowest class in the game could suddenly retreat from almost anyone for free. Valve finally split the weapon attributes into two separate weapons, and even then they had to add a debuff to the speed-based item to prevent people from employing that same tactics.
** Wrangler jumping. Usually, the Engineer's Wrangler item allows him to selectively pick more dangerous targets as needed while making his sentry gun more durable. Some Engineers have taken to using it to rocket jump using their sentry gun's rockets, while also grabbing one of their buildings and flying to an unusual but often remote perch to set up shop there.
** Bonk Atomic Punch provides some six to eight seconds of invincibility for the usually fragile Scout and was made mostly to get past chokepoints full of enemy fire. Nowadays people use it to abuse the Scout's long but somewhat glitchy taunt kill, baiting people into coming up to them waiting for the temporary invincibility to wear off, only to get an instant-kill bat swing to the face.
** Pyro rocket jumps. The compression blast ability for the Pyro allows them to reflect enemy projectiles such as rockets and grenades back at the enemy to deal increased damage. However, some highly skilled Pyros have taken to using enemy rockets to give ''themselves'' a rocket jump, flying across maps and often much, much closer to less than thrilled enemies.
** The Short Circuit is an item that fires electrical pulses that destroy incoming projectiles but does very low damage. It's supposed to be used for protecting a nest from incoming fire. When a patch greatly increased the fire rate in addition to lowering the metal consumed per blast, Engineers were suddenly running into battle, sometimes in packs, [[DeathOfAThousandCuts zapping the enemy team to death]]. Subsequent patches nerfed the item's unintended offensive power.
** Beggar's Bazooka, an inaccurate rocket launcher whose main purpose was to belch out rockets in packs of three, and exploding in your face if you tried to load more. Some players, however, ran with the "exploding in your face" issue, equipped their Gunboats, told their medics to Uber them, and started to gleefully achieve flight, with every successive explosion propelling them while still in the air. Essentially, they turned a SpamAttack rocket belcher into a personal Orion drive.
** The Spy's Dead Ringer allows him to fake his own death, and gave him massive (90%) damage resistance upon doing so in order to allow him to escape danger. This resistance was often used not for getaways, but to become a StoneWall and tank damage and/or [[https://www.youtube.com/watch?v=8Q47ehXqKfY block an enemy's progress by standing in their way.]] The resistance was eventually nerfed and a speed boost effect was added to bring the item back in line with its original purpose.
** The Spy's Taunt, the Box Trot is a cosmetic that makes the Spy imitate [[VideoGame/MetalGear Metal Gear's]] infamous cardboard box creeping. The problem is that the Spy's impersonation of the box is too good, as he's completely unmoving with a low hitbox. The box blends into the scenery of most maps, allowing canny Spies to block capture points undetected by hiding just close enough.
* The remake of ''VideoGame/ResidentEvil'' gave you more ammo, but had zombies come back as the much more powerful [[DemonicSpiders Crimson Heads]] if you didn't properly dispose of their bodies by either incinerating or beheading them. There wasn't enough kerosene in the game to burn them all which normally forced you to either dodge some or deal with a more powerful zombie later, but if you purposely killed zombies so their corpses were touching, you could burn all of them with one dose of kerosene thanks to a [[GoodBadBugs bug]] in the game's flame mechanics. Since most zombies appear in at least pairs, it is actually possible to kill and burn every zombie in the game and only deal with the two mandatory crimson heads that appear. The HD remaster even adds an achievement for doing this.
* ''Nippon Ichi'' games are all about exploiting the game mechanics to make incredibly powerful characters. It's necessary for taking on the optional content.
** ''PhantomBrave'' allows you to boost an item's stats by fusing another item to it, gaining a permanent increase measured by the difference between the items' stats. It also allows you to exchange Titles on items and characters, which increase or decrease stats by certain percentages, the worst being the -80% Title "Failure". Put the Title on an item to reduce the stats, fuse it to some other stuff to bring the stats up to a reasonable level... then put the original Title back, multiplying the stats by fivefold or more.
* In ''Videogame/KerbalSpaceProgram'', due to some quirks of the physics engine, several rocket parts are frequently used for purposes other than designed. Sometimes cheats or mods amplify this.
** The Hitchhiker storage compartment is simply meant to ferry passengers into space but often serves as the habitation module for a space station or planetary base.
** Plantable flags are meant to mark your landing sites on other celestial bodies but also make a great way to mark the location of the space center and by using a pair of them help you line up on the runway for for landing spaceplanes.
** Due to issues with the aerodynamics system, various control surfaces (flaps, elevators, elevons, etc) can be used to propel an atmospheric craft infinitely without any source of fuel. Known as an "Infiniglider".
** In early versions of the game before the introduction of landing legs, winglets and fins were often used for that purpose.
** Cargo bays were introduced in version .25 and due to the fact that they have axial symmetry were immediately flipped over and converted to bomb bays by just about everyone.
** The EVA pack the Kerbals wear has limited fuel, but it is automatically refilled whenever a Kerbal boards a spacecraft, and it does not draw from the craft's store of monopropellant, oxidizer, or liquid fuel, so for those with a lot of patience it can be used as a low-thrust engine with infinite range.
* Even PlatformHell hacks can be subject to this trope. [[https://www.youtube.com/watch?v=jbBY6T0KoxM Here]]'s a tool-assisted playthrough of the hack Glitch Abuse 2 in under three minutes (a playthrough of the intended route takes at least ten, and that's still with a few unintended skips in there) thanks to a glitch that turns a Pokey into a goal object, and [[https://www.youtube.com/watch?v=5W8NrdvwmLo here's]] a playthrough of the hack ''Super Mario World Intrigue'' that subverts the hack's intention for Mario to be a OneHitPointWonder for most of the stages, thereby allowing large chunks of several stages to be skipped. And [[https://www.youtube.com/watch?v=XVfZWw3aEhQ here's a run]] of ''VideoGame/KaizoMarioWorld 3'', which takes Yoshi into situations he isn't meant to be taken into and uses other glitches to bypass some of the hardest platforming in the game.
* The mother of this trope comes in with "total control" tool-assisted {{Speed Run}}s, which take control of the game and literally program in new code. [[https://www.youtube.com/watch?v=Uep1H_NvZS0#t=1885 Here]]'s one for Super Mario World, which won TAS of the year for 2014 at tasvideos.org by a pretty wide margin, being run at AGDQ. [[spoiler:It ends up literally programming Snake and Pong into the game code.]]
* The humble Machine Gun in ''[[Videogame/MechWarrior MechWarrior Living Legends]]'' is built in mind for AntiInfantry and light AntiAir usage, as it deals a truly pathetic amount of damage against [[HumongousMecha Battlemechs]] and tanks. However, they actually became a favored auxiliary weapon in battlemech fights, especially if the enemy mech has an "aircraft" torso rather than a "man-walker" design; by spraying the machine guns wildly across the battlemech's nose ahead of the cockpit, you can effectively blind the pilot through the sheer amount of BulletSparks thrown up; the obstructed view not terribly effective against moving targets, but a stationary sniper is completely incapable of seeing what he's shooting.
* ''Mechwarrior 4'' was not immune to this either. Until it was removed in later iterations of the multiplayer, some mad people would take light 'Mechs stuffed to the gills with flare launchers, then go around firing their massed flare launchers at enemies. This had a threefold purpose: One, flare launchers could blind pilots when fired en masse (the official guidebook even acknowledges this). Two, any 'Mech with flares stuck on it would be visible to other 'Mechs out to almost a kilometer. Three, with enough flares, one could ''lag your opponent's game to a complete standstill'' because many graphics cards and RAM sticks of the time couldn't handle being drowned in over a dozen particle-emitting light sources at point blank range simultaneously.
* In ''Videogame/PlanetSide 2'', tanks are designed largely to murder other ground vehicles and infantry, with AntiAir being relegated to dedicated vehicles as tank cannons can only aim about 30 degrees up. Immediately after release, players started to prop their tanks nose up on rocks and use the main cannon to OneHitKill aircraft who could laugh off the pathetic AntiAir flak weaponry. The Prowler took this to its logical conclusion, with its [[DualModeUnit Anchored Mode]] ramping up the rate of fire, reload speed, and projectile speed up to ridiculous levels, allowing it to gib Galaxy transports and Liberator Gunships from a kilometer away; it was silly enough that anchored mode's projectile speed bonus was later nerfed.
* In Hard Man's stage in ''VideoGame/MegaMan3'': scrolling the bees offscreen to make them disappear is such a time-honored trick that the hint mode in later releases[[note]]Rockman Complete Works (Japan-only) and the Anniversary Collection[[/note]] actually ''suggests'' it to you.
* ''VideoGame/BelowtheRoot'' is an old example of a perfectly good loophole. Certain hostile NPCs would wander the map, and if your character ran into them, they'd be instantly transported to a prison house of the hostile character's faction. Seeing as you lost no time by being captured, it was fairly easy to escape the prison houses if you had the right tool (the Nekom house actually contained the best tool to escape, so if you had the key or had learned telekinesis, it was yours for the taking), and the houses themselves were not that far from important locations in the game, the kidnapping mechanic could easily be turned into rapid transit.
* In ''VideoGame/CastlevaniaHarmonyOfDespair'', the Yorick soul is meant to be a projectile that can be hit into enemies; however most players use the Yorick soul in order to act as a double-jump of sorts, by launching the projectile upwards and then jump-kicking off the projectile. The Puppeteer soul is also often used to trigger glitches that can send Soma (the only character that can use the Souls) great distances quickly.
* ''Videogame/GrandTheftAuto'' fans are sneaky bastiches by nature, so one example shall suffice. One self-imposed challenge to get "special cars" involved killing an unkillable person. Fire proof, bullet proof, run-over-with-car proof...Noone succeeded until one genius found out it wasn't repeatedly-landing-with-a-parachute-on-them proof.
* ''VideoGame/CommandAndConquerGenerals'', one of the major weaknesses of the Chinese faction is that they lack a FragileSpeedster unit. This is especially problematic against the GLA, whose [[MacrossMissileMassacre Rocket Buggies]] can pound Chinese units from afar and speed off with nothing able to catch them except [[DeathFromAbove MiGs]]. The ''Zero Hour'' expansion pack added the Listening Outpost, a van with two Tank Hunters in it that was stealthed while stationary and also capable of detecting enemy stealth. Ostensibly, the Listening Outpost was meant to be used as an early-warning alert system, but most China players use the Outpost as their scouting unit because it's the fastest ground vehicle available.
* ''VideoGame/AdvanceWars'' has two notable examples:
** In the first game the enemy will ''always'' attack an [=APC=] first with absolutely no exceptions. They will march past the infantry halfway through capturing their [=HQ=] (instant loss if it succeeds) to blow away the [=APC=] who dropped him off. This makes them more useful for luring the enemy into traps or away from valuable units than their intended purpose of transporting infantry or resupplying units. Later games corrected this, but it's still a valid tactic since the [=APC=] remains high on the [=AI's=] attack priority.
** Anti-Air guns are cheap, highly mobile, and ''extremely'' effective at dispatching enemy infantry, since their only means of attack is their primary vulcan canon which can do upwards of 180% damage unlike the tank who's secondary machine gun will do about 80% damage, and are also rather effective against recons and other such vehicles. They get more usage defending properties from advancing infantry than they do taking down aircraft, and later games actually point out their effectiveness at this.
* ''VideoGame/DragonQuestIX'''s Sterling's whistle is used to summon the GlobalAirship. However, as your main character is technically the only one supposed to be onboard, using it will revive him at 1 HP if he was dead.

[[folder:Tabletop Games]]
* ''TabletopGame/{{Exalted}}'': the Twilight Caste were originally conceived as TheSmartGuy of the group, with their caste abilities inclining them toward sorcery, teaching, dealing with spirits and demons, solving crimes and building stuff. Due to their brokenly strong anima power, they became the preferred ''melee fighters'' of the Solar Exalted until they were hit by several consecutive rounds of errata aimed at putting the [[DoAnythingSoldier Dawn Caste]] back at the peak of warrior skill where they were originally supposed to be.
* ''TabletopGame/DungeonsAndDragons'' and (to a lesser extent) ''TabletopGame/{{Pathfinder}}'' players are notorious for exploiting these. Whole message boards are devoted to optimizing builds by using abilities in strange ways. Among the more egregious abuses include turning a spell called Locate City into a massive lethal explosion (brings new meaning to "[[DungeonBypass Scry and Die]]"), doing infinite damage with a dagger much too small for a human to consider more than a toothpick, and turning cannon fodder monsters into lethal encounters for powerful players with devious traps. Of course, the counter is always an attentive DM who puts his/her foot down and says "RuleZero, you can't do that."
** Another, the "Peasant Railgun", involves an extremely sketchy comprehension of physics. The idea being that the last man in a line gives a spear to the man in front of him, a series of actions that takes 6 seconds according to game mechanics. Thus the spear ends up moving with a speed that increases the longer the line is (with speed equal to distance traveled divided by a time period of six seconds), and thus should be moving at supersonic speeds when it reaches the front of the line.
** One thread was dedicated to necromancers using zombies to respond via yes/no actions... essentially, creating a giant computer.
** During a previous incarnation of Wizards of the Coast's forums, there were ''two'' optimization forums. One (Character Optimization) was dedicated to optimizing character builds. The other (Theoretical Optimization) was dedicated to outright insane but legal per the rules as written builds (in other words, CO was the board making things most [=DMs=] would let past, TO was the board making things no sane [=DM=] would ''ever'' let be used).
** Summon magic is, quite obviously, meant to summon a creature to fight on your behalf. In version 3.0, though, spellcasters tend to find it more useful to summon a whale [[GravityIsAHarshMistress directly above the enemy's head]]. [[ObviousRulePatch 3.5 changed the rules so that you can only summon creatures into an environment capable of supporting them]].
** The 3.5 [[PsychicPowers psionic power]] ''control body'' lets the user move another creature telekinetically like a puppet and force them to attack things. While intended as a way to disable enemies, some characters instead used it on themselves in order to make up for poor physical strength. What's more, since targets of ''control body'' aren't prevented from using PsychicPowers, it could be combined with ''solicit psicrystal'' (transfers control of one of your ongoing powers to your [[{{Familiar}} psicrystal]]) to effectively get double turns. ''Psionics Unleashed'', a ''TabletopGame/{{Pathfinder}}'' port of the 3.5 psionics rules by Creator/DreamscarredPress, adds a rule that [[ObviousRulePatch you can't use Control Body on yourself]].
* In TabletopGame/SpheresOfPower, the Skilled Casting drawback ties your magic to a Perform, Profession, or Craft check. This is so you can do flavorful things, like MagicMusic (via perform), or being able to [[WeatherManipulation control the weather]] because of how skilled a sailor you are (via Profession), or [[GeometricMagic making runes to hold your magic]](via Craft). However, ANY Perform, Profession or Craft check can be used, so you can declare your ability to summon lightning be tied to how well you can make cupcakes.
* In ''Tabletopgame/BattleTech'', [[HumongousMecha battlemechs]] can carry friendly [[PoweredArmor battlearmor]] into combat, at the cost of being unable to fire their torso-mounted weapons along with making the battlearmor easy targets. When the mechanic was first introduced, players quickly realized that you could just [[HumanShield pile battlearmor onto your mech and use them as free armor]], because the battlearmor would take hits that would otherwise damage the mech's torso. Later fixed in an ObviousRulePatch.
* ''TabletopGame/Warhammer40K'':
** InUniverse: The massive suits of Tactical Dreadnought (aka, Terminator) Armor, which can resist a few shots from anti-tank weapons were at first used to protect people working on plasma reactors while the reactor was on.
** Thanks to some poorly-thought-out mathematics, one player discovered that igniting the equivalent of a supertanker-ful of promethium (in other words, far less than the mighty refineries of the Imperium can contain) would result in a fireball that dwarfs the Sun. Cue the idea of using freighter ships loaded with the stuff on kamikaze runs.
* According to the rules in a ''TabletopGame/WarhammerFantasyRoleplay'', one of the low-level spells was intended to make emergency, temporary torches: the object the spell was cast on would glow brightly for an hour before vanishing. Players figured a waiting period of an hour was a fair trade for ''permanently disappearing a boss''.

[[folder:Western Animation]]
* In ''WesternAnimation/MiraculousLadybug'', the butterfly Miraculous was made to [[SuperEmpowering temporarily empower ordinary civilians]] to aid against villains a la ''VideoGame/TheWonderful101''. BigBad Hawk Moth uses it to inflict DemonicPossession on his victims and turn them into supervillains to wreak havoc in Paris.

[[folder:Real Life]]
* Under Australian consumer law, you are entitled to a refund or replacement if an item you purchased is not fit for its intended purpose. This obviously means the task it was originally designed for, but also, if you conveyed a different purpose to the person you bought it from, and it's not suitable for ''that'' purpose, you are still entitled to a refund/replacement.
* There are entire websites dedicated to "lifehacks", which are basically creative ways to use everyday things.
* Cars have long come with a built-in cigarette lighter, intended to [[CaptainObvious light cigarettes.]] The 12-volt socket the lighter plugs into was designed specifically for it -- but inventors soon realized it could be used to power other convenient gadgets. Now, between the success of these gadgets and the decline of smoking, many cars come with several 12-volt sockets and no lighter at all!
* Patent laws were meant to protect the creators and inventors from having their creative endeavors exploited and stolen, ensuring they would be compensated. Due to loopholes in the law, they do nothing to stop businesses from buying up patents and suing others for using it (at least in the U.S.), often under vague interpretations of use. Given that fighting lawsuits is more expensive than settling, entire companies have been set up to do just this (often called Patent Trolls).
* Military rules and regulations are prone to this, due to the military culture of following orders to the letter, often ignoring the spirit of it. These can be exploited by the common troop to get away with things, or by commanding officers looking to punish someone.
* Quite a few popular drugs started life as treatment for something else, but the side-effect was so interesting that it soon became almost exclusively known for the non-intended use:
** Heroin, for example, was originally used to treat Morphine addiction. What happened right after that is obvious.
** Of all drugs, Viagra and Cialis began this way. Created to treat pulmonary hypertension and angina pectoris, it turned out that the tissue responsible for erections responded in the same way as the original target for the drugs, so both drugs were rebranded and distributed as a drug for erectile dysfunction before being tested and approved for the intended use.
** Rogaine (a topical treatment for baldness) was also originally developed to treat hypertension.
** Most over-the-counter sleep aids use the active ingredient diphenhydramine, which is better known as Benadryl, an antihistamine that has drowsiness as a side-effect. So the companies just started marketing the side effect as a primary effect.
** Cough syrup works not by soothing your throat, but by shutting down the cough reflex in your brain. Taking it in excessive doses is psychoactive on par with illegal street drugs, but it's not illegal because there's no other known way to treat coughs, and it's downright nasty (the taste being enough to make people vomit from that alone).
** As famously described in ''TheWolfOfWallStreet'', Qualuudes began their life as a sleep aid. However, users noticed that after taking them if they resisted the urge to sleep, it would have a very powerful psychoactive effect. The popularity of the secondary use eventually led to them being banned.
* AK-47 magazines make excellent bottle openers. So do the iron sights of several missile launchers.
* Many products were originally sold for an entirely different purpose, only for consumers to find a ''much'' better use. One famous example are Kleenex Tissues: They were originally marketed as make-up removers until the company noticed the majority of people buying them were women ''and'' men using them to blow their noses instead.
** Similarly, cotton swabs (AKA Q-tips) are theoretically intended for applying makeup or antiseptics. Everyone and their mother uses them to clean their ears out, even though the package says you're not supposed to.
* USB ports, which were originally intended to allow peripherals to interface with computers, have the added feature of a 4.5V power line. There are AC adapters that completely ignore the data lines to provide power for charging or running portable devices, and they are fast becoming the standard for things like cars, and airplane and bus seats, where a low-voltage DC power supply is desired. You can now even buy receptacles with built-in USB ports specifically for charging your devices without an adapter right at home.
* Graphics cards are designed to perform certain types of operations on lots of data very quickly. This means that if you have a problem that can be reduced to one of those operations and a lot of data to do it on, you can co-opt the graphics processor to do it. It turns out that certain kinds of physics computations fall into this category, so early "graphics workstations" were extremely popular with physics and chemistry departments for reasons the designers never expected. More recently, high-performance graphics cards have been used to allow much faster Bitcoin mining than is possible otherwise.
** Outside of PC graphics cards, video game consoles such as the XBox contained powerful processors and were being sold at a loss to recoup the pricing in games. Predictably, people wanting raw processing power bought up the consoles to make use of that hardware for calculations.
* In the early days of skiing (and still sometimes on more rural areas), old cars had their drive wheels hooked up to rope pulleys. With another pulley mounted on the top of a slope, the wheels lifted from the ground, and the car in forward idle, a makeshift rope tow ski lift would be created.
* Changing your web browser's user agent string, which among a few other minor details tells a website which browser you're using for the purposes of compatibility, isn't something an everyday web user would ever have to worry about. That is, until people realized they could use the old-style of Website/{{Google}} (as well as other sites) which some people prefer by using a plugin to tell the site they're using a browser incompatible with the new style of Website/{{Google}}.
* You ''could'' go to the office store and buy a paper weight. But most people would simply use whatever happens to be nearby such as a mug or anything else that's both heavy and small enough.
* As the name implies, the Fender Jazzmaster was a guitar designed with jazz music in mind. Ironically, it was largely ignored by jazz musicians and instead it quickly became a hit with SurfRock guitarists. The guitar was popularized once again by a number of AlternativeRock bands and artists from TheEighties onward.
* [[CaptainObvious Iron bombs are designed to hit ground targets]]--the only guidance they have is gravity, after all. However, a particularly creative USAF pilot found himself having to deal with enemy [=MiG=] fighters while in his relatively slow and somewhat ungainly F-105 fighter-bomber, and elected to fly higher than the enemy fighter and eject a rack of bombs he had been carrying. The [=MiG=] pilot hadn't expected that move for fairly obvious reasons, and may go down in history as one of a very few fighter craft to have been bombed in mid-flight.
* Microsoft Excel may have been designed as an accounting and spreadsheet program, but it can be used to classify and organize all kinds of things. As just one example, historians may use Excel to organize, classify and summarize research materials. Taking it UpToEleven, one Tumblr user's grandmother found a [[http://i.imgur.com/hZFvwVm.jpg completely different use for it.]].
** Microsoft Excel may just be the software king of this trope, it has been used for everything from letter-writing (instead of Microsoft Word? Why? Because the grids make it easier to align the text!) to filing taxes (screw Quicken!) to even being used as a ''[[https://www.cnet.com/news/play-an-rpg-made-in-excel/ game engine]]''!.
* Duct Tape. From making things from scratch to [[https://en.wikipedia.org/wiki/Duct_tape_occlusion_therapy curing warts]], you can quite literally use it for anything.