History HoistByHisOwnPetard / VideoGames

** ''VideoGame/DevilMayCry5'': [[spoiler:It's possible for Nero to defeat [[FinalBoss Vergil]] by grabbing his sword, Yamato, and stabbing him with it.]]

* In ''VideoGame/PartyProject'', if a player uses a Hidden Block Card, it's possible for them to receive a Shadow Star[[labelnote:*]](so long as they're enabled in the settings)[[/labelnote]], causing them to ''lose'' a Star[[labelnote:*]](or 30 coins if they don't have a Star)[[/labelnote]] by simply using their own item.

!!Often a DeathTrope, so expect to see unmarked spoilers ahead.

* In ''VideoGame/PartyProject'', if a player uses a Hidden Block Card, it's possible for them to receive a Shadow Star (so long as they're enabled in the settings), causing them to ''lose'' a Star (or 30 coins if they don't have a Star) by simply using their own item.

* In ''VideoGame/PartyProject'', if a player uses a Hidden Block Card, it's possible for them to receive a Shadow Star (so long as they're turned on in the settings), causing them to ''lose'' a Star (or 30 coins if they don't have a Star) by simply using their own item.

* Two [[AchievementSystem advancements]] in ''VideoGame/{{Minecraft}}'' specifically [[InvokedTrope invoke]] this trope: "Return to Sender", which challenges the player with killing one of the fireball-belching Ghasts by punting its own fireball back at it, and "Who's the Pillager Now?", which tasks the player with shooting and killing one of the crossbow-wielding Pillagers with a crossbow.

** Wolfey actually discuss this trope in this [[https://www.youtube.com?watch=SEQuRJirMG0 video]] where one competitive player in the Pokemon World Championship actually caused their opponent to lose by swapping their Choice Specs[[note]]Boosts the special attack of the user by 50% at the cost of only being allowed to use the first move[[/note]] on an Indeedee that just used Trick Room[[note]]Assuming all pokemon are using moves that do not cause them to attack out of order like Quick Attack or Counter, the slower pokemon attacks first. Of course this means the Pokemon can only use Trick Room repeatedly, which essentially makes it useless[[/note]] and having a [[YouWillNotEvadeMe Shadow Tag Gothitelle]] on the field to prevent the Indeedee from switching out[[note]]Normally, you would switch out to get rid of the move lock but Shadow Tag prevents the opponent from switching out[[/note]]. Said player then proceeded to defeat their opponent by turning it into a 2 vs 1, using their opponent's Indeedee for the win.

* ''VideoGame/RedDeadRedemption2'': [[spoiler:Thomas Downes coughs on Arthur Morgan while the latter is beating him to recover a debt. There's even a particular moment where he coughs right in Arthur's face and Arthur wipes it in disgust. Downes' wife comes out and reveals that Downes is sick as he lies there coughing and struggling for breath. This is how Arthur caught TB. The music that plays in the ride back to camp clues the player into something major having just happened.]]

** The TrueFinalBoss in the pacifist route get done in by the very power he was seeking to obtain. [[spoiler:Flowey absorbs the 6 human souls and the soul of every monster to obtain his true form, Asriel Dreemurr, who was a young boy before he died and was reborn as Flowey. With all the souls at his hands, Asriel has massive power, but the souls also give him the ability to feel compassion and love again whereas his Flowey form did not due to said form not having a soul to begin with. The ability to have empathy is what brings Asriel down when you keep showing him mercy as he once again feels the same compassion and love he once had when he was alive and he eventually gives up.]]

** There is an achievement in for mind-controlling an Ethereal. Fittingly, it's called "[[Franchise/XMen Xavier]]". It's very difficult, but can temporarily grant you the Ethereal's impressive array of PsychicPowers, some of which are beyond your psi-soldiers. And yes, nothing prevents you from ordering him to put a Rift right next to him, which will deal tons of damage to him every turn, or blast one of his own [[PraetorianGuard Muton Elite]] bodyguards with a Psychic Lance. Even funnier is the fact the aliens bringing psi-users to the fight is basically the entire reason humans can develop psychic powers to begin with.

*** In the fourth case, we have [[spoiler:the defendant, [[BitchInSheepsClothing Matt Engarde]]. To avoid personal accountability in the murder of his rival, Juan Corrida, he hires [[ProfessionalKiller Shelly De Killer]] to assassinate Juan and kidnap Maya to force Phoenix into defending him. However, he also takes the time to set up a hidden camera in a giant stuffed bear so he could film De Killer, with the intention of [[BullyingADragon blackmailing him later]]. This backfires spectacularly once De Killer is made aware of the situation since, due to it breaching their contract, [[TheDogBitesBack De Killer now has his sights set on the one who hired him]]. To drive the point home, Phoenix was forced into a SadisticChoice by Engarde: either prove his guilt and lose Maya, or let him walk free and let Adrian Andrews take the fall. After Engarde's blackmail attempt is found out, he's caught in a similar situation: either plead guilty and rot in jail, or roam free and get hit by De Killer.]]

*** In the fourth case, we have [[spoiler:the defendant, [[BitchInSheepsClothing Matt Engarde]]. To avoid personal accountability in the murder of his rival, Juan Corrida, he hires [[ProfessionalKiller Shelly De Killer]] to assassinate Juan and kidnap Maya to force Phoenix into defending him. However, he also takes the time to set up a hidden camera in a giant stuffed bear so he could film De Killer, with the intention of blackmailing him later. This backfires spectacularly once De Killer is made aware of the situation since, due to it breaching their contract, [[TheDogBitesBack De Killer now has his sights set on the one who hired him]]. To drive the point home, Phoenix was forced into a SadisticChoice by Engarde: either prove his guilt and lose Maya, or let him walk free and let Adrian Andrews take the fall. After Engarde's blackmail attempt is found out, he's caught in a similar situation: either plead guilty and rot in jail, or roam free and get hit by De Killer.]]

*** In the fourth case, we have [[spoiler:the defendant, [[BitchInSheepsClothing Matt Engarde]]. To avoid personal accountability in the murder of his rival, Juan Corrida, he hires [[ProfessionalKiller Shelly De Killer]] to assassinate Juan and kidnap Maya to force Phoenix into proving his innocence. However, he also takes the time to set up a hidden camera in a giant stuffed bear so he could film De Killer, with the intention of blackmailing him later. This backfires spectacularly once De Killer is made aware of the situation since, due to it breaching their contract, [[TheDogBitesBack De Killer now has his sights set on the one who hired him]]. To drive the point home, Phoenix was forced into a SadisticChoice by Engarde: either prove his guilt and lose Maya, or let him walk free and let Adrian Andrews take the fall. After Engarde's blackmail attempt is found out, he's caught in a similar situation: either plead guilty and rot in jail, or roam free and get hit by De Killer.]]

** Non-villainous example in ''VisualNovel/PhoenixWrightAceAttorneyJusticeForAll'': Pearl charges Maya's Magatama with the ability to see people's "Psyche-Locks", then teaches him how to use it as a LieDetector. In both this game and [[VisualNovel/PhoenixWrightAceAttorneyTrialsAndTribulations the sequel]], there are Psyche-Lock sequences where you need to use it to uncover Pearl's secrets.

* In ''VideoGame/BrainDead13'': During the stairs sequence, Lance picks up several of Fritz's weapons to use against him, including at least [[DropTheHammer two hammers]].

*** An example of both the victim ''and'' the culprit suffering from this occurs in the fourth chapter. [[spoiler:Miu Iruma]] plotted out their murder ahead of time, only for their victim to catch on and respond by [[spoiler:manipulating Gonta into killing her. He then works on a proper defense with Gonta, but his co-conspirator winds up forgetting about it due to plugging in his VR headset's cords incorrectly, which leads to others catching on and exposing the truth during the trial]].

* ''VideoGame/{{Kindergarten}}'':

** ''VideoGame/KingdomHeartsI'': Certain enemy projectile attacks can be deflected back at them with the guard command. They can even be killed this way. Special mention goes to the [[BonusBoss Ice Titan]], whose fight involves deflecting its attacks back at it.

*** ''VideoGame/RockmanWorld5'' At the end of the game, Wily awakens the ancient military weapon "Sunstar" and tries to order him to destroy Mega Man. Sunstar decides to attack Dr. Wily instead. Known for being one of the few instances in the classic Mega Man series where Dr. Wily is NOT the final boss.

** In the fourth case of ''VisualNovel/PhoenixWrightAceAttorney'', Manfred von Karma jokingly offers for Phoenix to cross-examine a witness's parrot (which he had already fixed) to trip him up and embarrass him. [[spoiler:The parrot's testimony, along with a few other things, ends up destroying von Karma's case and getting an innocent verdict.]]
*** In the same game, the same can be said of [[spoiler:Damon Gant. Wanting to have Phoenix's badge removed, he admitted that he cut a piece of cloth from Neil Marshall's jacket with Ema's fingerprints on it. Decisive evidence that Phoenix knew all about and hid from the court, meaning it was illegal evidence... except it wasn't. Phoenix perfectly knew that he couldn't present said evidence, since at the time its relevance to the case wasn't made. The one who actually made the connection clear was Gant himself. An action that finally proved that he killed Neil. In other words, Gant betrayed himself and when he thought he was safe by admitting that he cut the cloth, he was actually playing in Phoenix's hand all along]].
** Non-Villainous example in ''VisualNovel/PhoenixWrightAceAttorneyJusticeForAll'': Pearl charges Maya's Magatama with the ability to see people's "Psyche-Locks", then teaches him how to use it as a LieDetector. In both this game and [[VisualNovel/PhoenixWrightAceAttorneyTrialsAndTribulations the sequel]], there are Psyche-Lock sequences where you need to use it to uncover Pearl's secrets.

*** The [[PoliceState ruling monarchy]] of [[FictionalCountry The Kingdom of Khura'in]] passed a law via the authority of the crown called the "Defense Culpability Act". This law meant that if you were perceived to have offered support to someone suspected of a crime, in any capacity, and that person is subsequently found guilty, [[DisproportionateRetribution you would also be considered guilty of the same crime, and be given the same punishment]]. This law lead to defense attorneys getting convicted ''en masse'', which in turn caused [[GenocideTropes a mass slaughter of attorneys until there were none left in the country]], and to the point where there were mass-graves marked with the Khura'inese attorney badge. The lawyers that weren't actually killed, were either thrown in jail, fled the country, or gave up their jobs to join [[LaResistance the rebels]] who were fighting against the corrupt sovereign. [[spoiler:After Apollo is in the middle of proving that game's BigBad, [[GodSaveUsFromTheQueen the Queen of Khura'in herself]], murdered her husband, tried to murder her sister, has been manipulating everything behind the scenes, turned Khura'in's legal system into a completely corrupt mess for her own twisted gains, ''and'' has never had any actual claim on the throne in the first place, [[OnlyBadGuysCallTheirLawyers she demands to be given a lawyer to represent her]]. [[{{Hypocrite}} Naturally it's pointed out that]] because of the attorney genocide that she herself had caused, there's none left.]]
*** There's another layer related to the above. [[spoiler:Ga'ran repeatedly claimed to be an exceptionally powerful medium, and yet she spent a lot of efforts to retrieve the Founder's Orb. This draws Apollo's attention, and he eventually pieces together the only possible motive: Ga'ran needs the Orb to gain spiritual powers, because she ''isn't'' a medium - and therefore, she has no right to the throne. So Apollo just gives the Orb to her, accuses her of being a fraud, and openly challenges her to perform a spirit channelling on the spot to prove him wrong. If she refuses, people will believe that Apollo is right, and dethrone her; if she accepts and attempts the channelling, she will fail and be dethroned anyway]].

* In ''VideoGame/TalesOfTheAbyss'' the BigBad creates TheHero and raises him to be a LaserGuidedTykebomb to [[ScrewDestiny derail the Score]] and kick off TheEndOfTheWorldAsWeKnowIt. Said hero, after he recovers from the HeroicBSOD from [[spoiler:being used to commit genocide]] by his ParentalSubstitute and finding out he's [[spoiler:[[CloningBlues a replica]]]], goes on to ''utterly screw over'' all of the plans of said BigBad and ultimately kill him. For bonus points, he uses the fighting style said BigBad taught up ''and'' is the one who successfully manages to ScrewDestiny.