History MyGodWhatHaveIDone / VideoGames

** The Zroni were the ones to discover the Shroud and how to channel its energies. They were on the cusp of using the Shroud's power to AscendToAHigherPlaneOfExistence and become gods, when they learned that doing so would annihilate the entire galaxy as a side effect. Half of their race (the Saviors) decided this couldn't be allowed to happen, and the other half (the Divine) didn't care and wanted to go through with it anyway. The resulting war ended in the destruction of their entire species... but the Savior faction managed to prevent the galaxy's destruction.

* In ''VideoGame/JetForceGemini'', King Jeff heads to planet Tawfret to give some more of his people the good news that Mizar's defeat may be at hand... only to see them getting rounded up into slave ships by Mizar's soldiers. He lets his emotions run out of control, and the resulting magical asskicking becomes decidedly not awesome when it [[NiceJobBreakingItHero zombifies the entire planet and most of the soldiers on it.]]

* ''VideoGame/SuperMetroid'' even has a few of these moments. After fighting a big Metroid, it runs off in shame once it realizes [[spoiler:Samus is its adoptive mother from the start of the game.]]
** Happens again the Crocomire, who suffers a nasty death hardly fitting it that can only make the player feel sorry for it. [[spoiler: (It spends a good 10 seconds having its ''skin melted off in acid'').]] Honestly, even the [[WordOfGod game designers]] felt the moment was worth a WhatTheHellHero.

* In ''VideoGame/TacticsOgre'', some of the leaders' death quotes might invoke this to the player. You kill a person who seems to just be a named Mook... then an optional battle (If you wanna recruit one of the characters) has a woman who wants revenge because you killed her husband. After you beat her, she reveals she's ''pregnant''. Another person laments that he won't be able to get medicine for his sick daughter.

* A pretty common tradition in the Tales series it seems, as ''VideoGame/TalesOfVesperia'' has [[spoiler:Estelle do this after driving [[ReasonableAuthorityFigure Belius]] mad by healing her]]. It takes another character's self-mutilation to drive [[spoiler:her]] back into reality.
** [[spoiler: Sodia]] also has this reaction after [[spoiler: [[WhamEpisode she stabs Yuri at Zaude.]]]]
* Emil has one in ''VideoGame/TalesOfSymphoniaDawnOfTheNewWorld'' in a skit after TheReveal that [[spoiler:he's really an amnesiac Ratatosk and that he's been using Marta as bait the entire time. Tenebrae talks him out of it though.]]

** And again in ''VideoGame/TombRaider2013''. Lara's first human kill occurs when [[spoiler: defending herself against what's ''very'' strongly implied to be a rape attempt by a {{Mook}}.]]

** [[SociopathicHero Kratos]], the [[VillainProtaognist protagonist]] of ''VideoGame/GodOfWar'', demonstrates this trope upon [[spoiler:killing his wife and child while destroying a village; this motivates him to turn against his former master [[JerkassGods Ares.]]]] Whether or not he actually learns from the experience and becomes a better person for it is a matter of debate.

* [[SociopathicHero Kratos]], the [[DesignatedHero protagonist]] of ''VideoGame/GodOfWar'', demonstrates this trope upon [[spoiler:killing his wife and child while destroying a village; this motivates him to turn against his former master [[JerkassGods Ares.]]]] Whether or not he actually learns from the experience and becomes a better person for it is a matter of debate.
** Happens again in ''God of War II''. At the end when he's [[spoiler: stabbing Zeus, he accidentally kills Athena.]] Kratos is distraught by this. Happens again in ''God of War III'' when Kratos gets so pissed at Zeus he lets go of Pandora whom he was trying to save from getting destroyed from the flame.

** ''VideoGame/Persona5'': After seeing the StarterVillain confess to all his crimes in front of their entire school and then ''beg'' to be arrested following their HeelFaceBrainwashing, the protagonists are actually somewhat terrified of the implications of their actions, and wonder for several days if what they've done can really be called "right".

* [[TheWoobie Oichi]] from ''VideoGame/SengokuBasara'', after [[spoiler:being [[BreakTheCutie driven insane]] by her [[{{Yandere}} husband's death]] and her [[YouBastard brother]] [[DemonKingNobunaga Nobunaga]]'s evil ways, goes on a RoaringRampageOfRevenge, killing her [[KillEmAll brother and all his subordinates]]. Afterwards, she briefly comes to her senses, realizes what she has done and bursts into tears... only to die when [[DroppedABridgeOnHim the roof caves in on her]].]]

* In the Ulduar raid of ''VideoGame/WorldOfWarcraft'', Algalon the Observer is sent by the Titans to "re-originate" the planet (read: [[KillEmAll destroy all organic life]]) in the event the corruption from [[EldritchAbomination the Old Gods]] got too severe -- actually triggered by your [[NiceJobBreakingItHero earlier murder of one of the Titans' corrupted overseers.]] However, if your raid [[ThatOneBoss manages to defeat him]], he has one of these moments, in which he laments just coldly following his orders without considering the lives of the people he was destroying.

** The Zroni were the ones to discover the Shroud and how to channel its energies. They were on the cusp of using the Shroud's power to AscendToAHigherPlaneOfExistence and become gods, when they learned that doing so would annihilate the entire galaxy as a side effect. Half of their race decided this couldn't be allowed to happen, and the other half didn't care and wanted to go through with it anyway. The resulting war resulted in the destruction of their civilization.

* [[spoiler: Terra]] from ''VideoGame/KingdomHeartsBirthBySleep'' has this reaction after [[spoiler: trying to [[KickTheMoralityPet stop Master Eraqus killing Ven, and taking it too far. Eraqus does it too when he calms down.]]. Then Xehanort finishes him off.]]

* In ''VideoGame/TwistedMetalBlack'', Agent Stone tells his backstory about how [[spoiler:he was once a SWAT cop, tasked with sniping a terrorist who is holding a mother and daughter hostage. As he contemplates the ineffectiveness of the legal system, his "rage gets the better of him" as he fires upon the terrorist. He wants to "send him to hell where he belongs!" Due to his anger, he loses focus and accidentally shoots the mother and child in the process.]] He recites this trope word for word.
-->'''Agent Stone:''' Oh, my God! What had I done? [[spoiler:Those people were dead, and it was all my fault!]]

** The ''Golden'' version of the game adds a new bad ending, where you can perform a FaceHeelTurn by [[spoiler:siding with Adachi after discovering he's the true killer, thus betraying the efforts and trust of the entire Investigation Team without them ever realizing it]]. Go through with it, and the new ending FMV will have [[CanonName Yu]] clutch his phone in frustration over his decision.

* [[VideoGame/StarCraft Admiral DuGalle]], after [[spoiler:he is tricked by Lt. Duran into killing his old friend Vice-Admiral Stukov, who reveals that Duran is a traitor with his dying words. [=DuGalle=]'s guilt over this later leads him to commit suicide after the Zerg have obliterated the UED forces]].

* ''Franchise/ShinMegamiTenseiPersona'':

** [[spoiler:Gavin Archer]] from the "Project Overlord" {{DLC}} eventually has this reaction to [[spoiler:the experiments he did on his brother, to the point where he ends up quitting Cerberus because of it.]]

* In TheStinger of ''Videogame/Portal2'', [[spoiler: Wheatley expresses remorse for his actions and wishes he could see Chell again so he could apologize. Unfortunately, [[HeelFaceDoorSlam he's stuck in space]], [[AndIMustScream pretty much forever]].]]
* ''{{Franchise/Halo}}'': It's revealed in ''Literature/HaloSilentium'' that many Forerunners felt this way about [[spoiler:killing their own Precursors.]]
* ''VideoGame/KnightsOfTheOldRepublic''. Zaalbar on the Star Forge, if Darth Revan forced him to kill Mission with Force Persuade earlier.
* Several examples from the various ''Franchise/TheLegendOfZelda'' games:
** Link from ''VideoGame/TheLegendOfZeldaOcarinaOfTime''. He pulls the Master Sword out of its pedestal, not knowing Ganondorf was using him to get into the Sacred Realm. It especially hits home when you visit what used to be Hyrule Castle. Link's expression can only be translated as "Oh my goddesses, I did this." What makes this moment especially heartwrenching is that ''Link is technically still a ten-year-old boy''.
** Mido, the self-established leader of the Kokiri, comes to regret his mistreatment of Link later in life. If Link talks to Mido after defeating [[FinalBossPreview Phantom Ganon]], he'll ask him to tell Link that he's sorry for the way he treated him, not realizing that he '''is''' talking to Link, grown up.
** Princess Hilda, Zelda's alternate universe counterpart in ''VideoGame/TheLegendOfZeldaALinkBetweenWorlds'', when she is confronted with the fact that [[spoiler:she started the exact same chaos that her ancestors were trying to prevent]].
* Alexandra Roivas from ''VideoGame/EternalDarkness'', at the end of the game. After you defeat Pious Augustus, Alexandra finally realizes the [[spoiler:[[CosmicHorror ancient god]] she just released has the power to destroy all of humanity. Shocked, she kneels and says "What have I done!?". The Ancient God is then turned into SealedEvilInACan by Edward Roivas' spirit, after replacing two of the runes in the super-mega-huge spellcasting device.]] Except not really, because it's revealed through one hell of a MindScrew that [[spoiler:Mantorok has [[MyDeathIsJustTheBeginning orchestrated events]] so that in three different iterations of reality a different Ancient was summoned each time, essentially meaning that all three were killed at the same time; not being subjected to the same rules of time and existence as us lowly mortals this could easily happen. Of course leaving Mantorok to fester for eternity, plotting his eventual escape.]]

* Seen using body language in ''VideoGame/TheWalkingDeadSeasonOne'' if, during the first episode, you saved Doug over Carley. Come episode three, [[spoiler:Lily is consumed with suspicion over which member of the group was secretly giving the bandits outside of the motor inn supplies, which led to them eventually storming the inn and causing everyone to flee and Duck to get bit by a walker. The group's RV stops by the road for a second, and in the middle of an argument, while his back is turned, Lily raises her pistol to Ben's head, but Doug notices in the nick of time and pushes Ben out of the way, TakingTheBullet and dying in his place. After the shot, Lily completely freezes, eyes wide, and can only stare at Doug's body and slowly shake her head.]]
* In ''VideoGame/DragonQuestVIII'', Dominico is said to be a descendant of one of the seven sages that sealed Rhapthorne away, and indeed, he appears to be a target of the possessed [[spoiler:Jessica]]. However, it turns out that [[spoiler:the ACTUAL descendant is Dominico's assistant David (who was Rhapthorne's real target), whom Dominico had treated like absolute crap for no reason at all, and Dominico himself was a descendant of the sage's servant]]. When [[spoiler:David is killed by Rhapthorne, who has now possessed Dominico's dog, Sir Leopold]], Dominico discovered it had been his duty to protect David, and pulls this trope when he realized he failed that duty miserably.
* In ''VideoGame/AliceMadnessReturns'', this question plagues Alice throughout her JourneyToTheCenterOfTheMind when many characters in her subconscious ask her "What have you done?" The answer turns out to be [[spoiler:nothing. Nothing to help save and protect the orphanage children being exploited around her, which she didn't realize was happening anyway due to her own abuse at the hands of Dr. Bumby exploiting her too.]]
* In [[spoiler:the 'good' ending of the demon path]] in ''VideoGame/SoulNomadAndTheWorldEaters'', [[spoiler:Gig]] gets the evil slapped out of him and reverts to his prior personality... With the first thing that strikes him is all the gruesome things he has been doing in the meantime.
* [[SociopathicHero Kratos]], the [[DesignatedHero protagonist]] of ''VideoGame/GodOfWar'', demonstrates this trope upon [[spoiler:killing his wife and child while destroying a village; this motivates him to turn against his former master [[JerkassGods Ares.]]]] Whether or not he actually learns from the experience and becomes a better person for it is a matter of debate.
** Happens again in ''God of War II''. At the end when he's [[spoiler: stabbing Zeus, he accidentally kills Athena.]] Kratos is distraught by this. Happens again in ''God of War III'' when Kratos gets so pissed at Zeus he lets go of Pandora whom he was trying to save from getting destroyed from the flame.

* ''Franchise/FinalFantasy'':
** Cecil and Kain, after unintentionally helping to destroy the village of Mist, in ''VideoGame/FinalFantasyIV''.
** Tidus spends the first half of ''VideoGame/FinalFantasyX'' telling Yuna how he'll take her to see his home of Zanarkand and all the fun things they can do together once Yuna finishes her pilgrimage. [[spoiler: Tidus eventually learns the AwfulTruth of Yuna's pilgrimage where she will sacrifice herself to temporarily rid the world of the monster, Sin. Tidus realizes that all the things he'd promise to do with Yuna after her journey was incredibly insensitive and he feels massively guilty over it. He rightfully gets angry at his party for not telling him sooner.]]
** In ''VideoGame/FinalFantasyXIII'', Lightning doesn't believe her sister Serah when she claims to be cursed with the brand of a Pulse l'Cie, assuming it's some lame excuse to justify her marrying Snow Villers (of whom Lightning had a LOW opinion). She responded with an angry reminder that she, as a Sanctum soldier, would be charged with hunting Pulse elements down. Later, when she hears new reports that there actually WAS a Pulse fal'Cie in Bodhum's neighborhood, she puts two and two together and proceeds to beat herself up over this particular screw-up.
*** In ''VideoGame/FinalFantasyXIII2'', [[spoiler:when the Unseen Chaos bursts from Etro's Gate and begins twisting the mortal world into a screwed-up place of doom, Noel realizes a few things. One, the goddess Etro is no longer among the living, and this is how the Chaos was able to burst out. Two, Caius held the Heart of Chaos, a manifestation of Etro herself. Three, however unintentional, Noel's own weapon was what pierced that heart. By the time ''VideoGame/LightningReturnsFinalFantasyXIII'' rolls around, Noel has spent the last five centuries convinced that he destroyed the world.]]
** [[BigBad Gaius]] in ''VideoGame/FinalFantasyXIV'' has this realization at the end of the 2.0 story where [[TheManBehindTheMan Lahabrea]] forces Ultima Weapon cast Ultima, which completely obliterates the castrum everyone was standing in. Gaius, seeing the raw destruction of Ultima firsthand, realizes that he shouldn't have unearthed the ancient weapon since it can easily destroy the very land he was trying to conquer. Lahabrea has Ultima Weapon ready Ultima a second time when its HP is low and if the players fail to stop him in time, [[TotalPartyWipe the entire party is killed instantly.]]
** In ''VideoGame/FinalFantasyTacticsAdvance'', [[spoiler: Doned has this reaction after realizing that his brother Marche was neglected back in the real world because Doned required more attention due to his illness. Doned didn't recognize that every sacrifice his family made, namely the move to St. Ivalice, their parents' divorce, and Marche's ongoing neglect, was either for his sake or a negative consequence of his illness on the rest of the family, instead choosing to resent Marche for being healthy and having friends, and thinking that he himself had nothing to be thankful for while Marche had a perfect life. Marche then finally reveals his resentment towards Doned for the ongoing neglect and the divorce, which he couldn't express before [[BecauseYouCanCope because Marche is the older brother and Doned is just a sick little boy]]. This segues into Doned's realization that he's been extremely cruel and selfish to his brother in his attempts to stay in fantasy!Ivalice.]]
* [[spoiler: Terra]] from ''VideoGame/KingdomHeartsBirthBySleep'' has this reaction after [[spoiler: trying to [[KickTheMoralityPet stop Master Eraqus killing Ven, and taking it too far. Eraqus does it too when he calms down.]]. Then Xehanort finishes him off.]]
* Neku Sakuraba from ''VideoGame/TheWorldEndsWithYou'', when he realizes that not only was [[spoiler:Megumi Kitaniji trying to redeem Shibuya from the fate of Sodom and Gemorrah, defeating him has effectively doomed everyone to die]].
* ''Franchise/ShinMegamiTenseiPersona'':
** [[spoiler:Ryoji]] does this [[spoiler:while explaining [[TheEndOfTheWorldAsWeKnowIt the Fall]] to S.E.E.S.]] in ''VideoGame/Persona3'', although in his case it's less "My God What Have I Done" than [[spoiler:"My God What Am I ''[[TragicMonster Going]]'' To Do?"]]
** [[spoiler:Taro Namatame]] in ''VideoGame/Persona4'' goes through this after being told that he was endangering lives by throwing people into the [=TVs=] rather than saving them as he thought. Of course that is if you didn't choose to throw HIM into the TV as an unfair version of the KarmicDeath.
** ''VideoGame/Persona5'': After seeing the StarterVillain confess to all his crimes in front of their entire school and then ''beg'' to be arrested following their HeelFaceBrainwashing, the protagonists are actually somewhat terrified of the implications of their actions, and wonder for several days if what they've done can really be called "right".
*** The goal of the Phantom Thieves as a whole is to invoke this trope on the scum of society by stealing their desires and forcing a change of heart, at which point the villain's heart won't be able to handle the weight of their sins and confess.

* This is a subtext of the game ''VideoGame/ShadowOfTheColossus''. Any time the protagonist kills one of the Colossi [[spoiler: the death scene is dramatic and sad to drive home the fact that ''you'' are the one invading and killing, and the Colossi were living their lives peacefully, bothering no one.]] Many people felt ''exactly'' MyGodWhatHaveIDone after they killed the thirteenth Colossus, specifically: a majestic creature that doesn't attack, can barely defend itself, and doesn't even approach the player in any way.
* In ''VideoGame/{{Shadowverse}}'', [[spoiler:when Rowen finds out that he has a curse where he can turn into a black dragon, he realizes that ''he'' was the one that killed Kyle.]]

* Kastor in ''VideoGame/AgeOfMythology'', after [[spoiler:blindly following Krios's hidden plan of releasing the Titans]].
* [[TheWoobie Oichi]] from ''VideoGame/SengokuBasara'', after [[spoiler:being [[BreakTheCutie driven insane]] by her [[{{Yandere}} husband's death]] and her [[YouBastard brother]] [[DemonKingNobunaga Nobunaga]]'s evil ways, goes on a RoaringRampageOfRevenge, killing her [[KillEmAll brother and all his subordinates]]. Afterwards, she briefly comes to her senses, realizes what she has done and bursts into tears... only to die when [[DroppedABridgeOnHim the roof caves in on her]].]]
* In the Ulduar raid of ''VideoGame/WorldOfWarcraft'', Algalon the Observer is sent by the Titans to "re-originate" the planet (read: [[KillEmAll destroy all organic life]]) in the event the corruption from [[EldritchAbomination the Old Gods]] got too severe - actually triggered by your [[NiceJobBreakingItHero earlier murder of one of the Titans' corrupted overseers.]] However, if your raid [[ThatOneBoss manages to defeat him]], he has one of these moments, in which he laments just coldly following his orders without considering the lives of the people he was destroying.
** The PLAYER has many of these moments. Highlights include [[spoiler: helping Garrosh free the heart of Y'shaarj, corrupting Pandaria's holy land, and almost killing a young man.]] It almost makes you wish you could choose to NOT participate in some of the quests.
** Thrall has a few of these throughout his life, despite being TheMessiah and an AuthorAvatar, such as leaving Garrosh in charge and realizing that this indirectly led to [[spoiler: Cairne's death, and eventually the death of thousands of others, including the extermination of an entire city.]]
** Sylvanas ALMOST has one of these [[spoiler: after dying and seeing what the afterlife is like, but it quickly becomes an IgnoredEpiphany and she becomes just as bad as Arthas, the only difference being that she "serves the Horde" and not just herself. Of course, it was all a big lie.]]
* In a more humorous example, in ''VideoGame/TheNamelessMod'', Despot says this when he tells the player that he left [[CloudCuckooLander Ghandaiah]] in charge instead of the far more competent King Kashue.

* Charles Barkley's feelings toward the chaos dunk he performed that killed thousands if not millions and led to the genocide of b-ballers in ''VideoGame/BarkleyShutUpAndJamGaiden''.
* ''Franchise/DragonAge'':
** The Paragon Caridin in ''VideoGame/DragonAgeOrigins'' [[spoiler: sacrificed Dwarves to create Golems on the Anvil of the Void]]. He initially justified this with the increasingly desperate war against the Darkspawn [[spoiler: and that he only used volunteers (who were unaware of the sheer agony involved)]]. But when the King (the only one in Dwarven society whose opinion trumps a Paragon's) JumpedOffTheSlipperySlope [[spoiler: and sent casteless, criminals, and his ''political rivals'' to the Anvil]] and Caridin protested, the King [[spoiler: had Caridin turned into a Golem by his own apprentices on the very Anvil he created]]. After [[spoiler: experiencing the "hammer's blow" himself]] Caridin realized he had done something unforgivable and dedicated himself to [[spoiler: ensuring that the Anvil could never be used again]].
*** Can also happen with the Paragon Branka, who led everyone in her house to horrible deaths in the Deep Roads on her mad quest for the Anvil of the Void, and [[FateWorseThanDeath allowed the Darkspawn to rape some of the women and turn them into Broodmothers.]] If the Warden sides with her during the initial dialogue with Caridin, which leads to being forced to kill him, in the conversation with her after the fight she can be persuaded to see the Anvil for the abomination it is, and to see all of the pain, suffering, and damage her maniacal desire for it has caused. If successful, it will cause her to be so overcome with guilt that it drives her to commit suicide by leaping into the lava.
** [[spoiler:Anders]] has this reaction in ''VideoGame/DragonAgeII'' right after [[spoiler:he blows up the Chantry and sparks open conflict between Mages and Templars]] if he is a full rival. After the most recent patch, he can even be convinced to [[spoiler:''side with the Templars'' after realizing that he has pretty much become a true abomination]] to help mitigate the damage to Kirkwall.
*** He also shows considerable guilt if [[spoiler:Vengeance kills an innocent during "Dissent"]], planning to attend the funeral as a kind of apology gesture, although Aveline tells him to just leave the family alone.
* In ''VideoGame/MetalGearSolid'', Hal "Otacon" Emmerich was initially led to believe that Metal Gear REX, the mecha he was working on with [=ArmsTech=], was a mobile defense platform with no nuclear capability. When Snake explains that he had been duped into developing a walking nuclear tank, he takes it very poorly; his grandfather was part of the Manhattan Project, his father participated in [[spoiler:the Peace Walker project (which itself almost caused a nuclear war)]], and now he himself (however indirectly) has given a terrorist group the capability to start one too.
* Adrienne in ''VideoGame/{{Phantasmagoria}}'' didn't actually say the line, but her "What have I done?" moment happened when she realized that [[spoiler: [[DemonicPossession Don's possession]]]] was the direct result of [[spoiler: her opening [[SealedEvilInACan Carno's Magic Book]] and releasing [[BigBad the Demon]]]] at the beginning of the game. Oops.

* A close variant of this phrase serves as the opening tagline of ''Dark Fall: The Journal''.

** The ''VideoGame/MegaMan4'' [[GameMod ROM hack]] ''VideoGame/Rockman4MinusInfinity'' implies this - it is possible to suck up Eddie for an item, but in the EndGameResultsScreen Proto Man laments his demise, then notes "Are you trembling?"

* In ''VideoGame/WorldOfWarcraft'' ''Cataclysm'', [[spoiler: Garrosh Hellscream]] has this reaction after [[spoiler: realizing that Magatha Grimtotem had poisoned his blade, and that by killing Cairne, he played right into her plans.]]

* In ''VideoGame/AssassinsCreedII'', some of the lieutenants of Savonarola have this reaction after Ezio fatally wounds them.
* ''VideoGame/StarOceanTheLastHope'': [[spoiler: In the past Earth, Edge hands an energy source equal in power to a doomsday device to Earth military so they can prevent the future disaster which befalls Earth. [[EarthShatteringKaboom This backfires.]] ]]
* At the end of Etna Mode in ''[[VideoGame/DisgaeaHourOfDarkness Disgaea: Afternoon Of Darkness]]'', [[spoiler:Etna recovers the memories that Maederas stole from her, and the very first one that returns is her promise to King Kricheveskoy, the only person she's ever trusted and looked up to, to protect his son Laharl. This being Etna Mode, Etna's already ''killed'' Laharl (or so she had thought until the end credits scene). A Not-So-HeroicBSOD ensues]].

* ''Franchise/MortalKombat'':
** In ''VideoGame/MortalKombatDeception'', this is Shujinko's default personality and motivation upon realizing that he have lived a mass majority of his life [[spoiler:being manipulated by Onaga, the Dragon King, into bringing him back to power]], and thereby setting up the entire plot of the game.
** Raiden has a massive moment in ''VideoGame/MortalKombat9'', [[spoiler:after he accidentally fries Liu Kang to death in self defense]] during their climactic PlotMandatedFriendshipFailure battle.
** Scorpion in ''VideoGame/MortalKombatX'', now restored to his human form, has this moment after learning that he (and Sub-Zero) were tricked by Quan Chi into pitting their respective clans against one another. In Scorpion's case, it hits harder since Raiden gave him an opportunity to have his family and clan revived in the previous game, but squandered it when Quan Chi fooled him into killing Bi Han (and thus, turning him into Noob Saibot).
** This is [[spoiler:present]] Jax's reaction in ''VideoGame/MortalKombat11'' upon learning the truth from [[spoiler:past]] Raiden about Kronika's true intentions. Prior to this, Jax made a [[DealWithTheDevil deal with Kronika]] [[IDidWhatIHadToDo to serve her forces in exchange for Jacqui's protection]], unaware that [[spoiler:Kronika only wishes to erase the current timeline (and everyone with it) in order to revive [[GodOfEvil Shinnok]] and restore the balance of and life and death to the universe]].
* King [[AFatherToHisMen Volechek]] in ''VideoGame/GoldenSunDarkDawn'' has this moment. When he realizes the [[SuperWeaponSurprise ancient tower]] he got the heroes to reactivate was really going to cause an [[TotalEclipseOfThePlot eclipse]] that [[ApocalypseHow summoned hoards of monsters]] on half of the globe. Did we mention his kingdom was in the middle of it?
** And in the game before that, ''The Lost Age'', [[spoiler: The FinalBoss the heroes killed turns out to be Isaac's father and Felix and Jenna's parents. This causes Jenna to have a complete emotional breakdown, knowing that not only her parents are going to die soon, but she was the one who did the horrible deed. To be fair, the Wise One did this trick to test the resolve of the heroes and the Golden Sun event winds up reviving the parents. Even then, Jenna is still shaken up by the whole ordeal.]]

* [[spoiler:Tyrann]] in ''VideoGame/{{NieR}}'' goes through this in Endings C & D over [[spoiler: his possession and corruption of Kaine. It motivates him to do a HeroicSacrifice for her.]]
* In the original ''VideoGame/{{Fallout}}'', you can invoke this from the FinalBoss. [[spoiler:If you present the Master with evidence that his modified FEV virus renders his super mutants infertile and incapable of procreating, he realizes that his plan to replace humanity with super mutants was doomed to fail, and that all of the atrocities he carried out in the hopes of restoring the world were for naught. He proceeds to [[DrivenToSuicide self-destruct]] after you flee from his base.]]
* In ''VideoGame/{{Fallout 2}}'', with a powerful speech check, the Chosen One can convince an Enclave scientist (Lt Col DR Charles Curling) that his FEV Curling-13 is overreaching and biased; he's ignored data that seriously argues that all life in the wasteland is evolving and that the Forced Evolutionary Virus is no different than if someone plagued everyone who happened to evolve without the appendix. While having used the guaranteed cure on the supposed "pure" race. He'll admit this, saying that he was so busy engineering his master thesis in biological warfare that he ended up forgetting the moral debates and social responsibilities of doing something horrible on a large scale. He decides to help the player kill everyone in the Enclave oil rig.
* In the ''VideoGame/FalloutNewVegas'' [[DownloadableContent DLC]] ''Old World Blues'', it's possible to get EvilutionaryBiologist Dr. Borous to feel intense guilt over his brutal experimentation of his loyal dog Gabe after you bring him his food dish. Of course, he quickly forces himself to suppress the feeling and goes back to his obsession with [[ForScience Science!]] [[spoiler:Unless you go and take his side during the first conversation, like Gabe would have. If so, in the latter conversation he'll have a much bigger guilt-trip, and vouch for you when the time comes, to give you "the life Gabe never had"]].
** The ''VideoGame/FalloutNewVegas'' DLC ''Lonesome Road'' essentially revolves around this trope- not only in the course of learning the [[ThenLetMeBeEvil cause of Ulysses's arguably justified hated of the courier and the world they live in]] (The player's ignorance of the courier's actions resulting from [[TraumaInducedAmnesia being shot in the head at the start of the game]]) but can also potentially occur at several points depending on the player's actions. Notable instances include [[spoiler: [[NiceJobBreakingItHero the accidental launching of a nuclear missile into the center of your irradiated former home town.]]]] Nearly all of the endings result in some form of MGWHID? in the form of [[spoiler: the nuking of the legion, the NCR, both, the death of ED-E the robot, and/or the death of Ulysses, the worst case scenario leaving the courier [[SoleSurvivor destroying everyone involved and then some]].]] One ending in particular results from the player [[spoiler:[[HeelRealization convincing Ulysses that nuking the NCR and Legion won't fix the world]], at which point it is revealed in Ulysses's ''own'' My God What Have I Done moment that [[YouAreTooLate he has already started the launch sequence, which cannot be stopped]] -except by letting ED-E override the launch by overclocking and frying himself or ordering him to stop only one of the missiles dooming the other target to another nuclear holocaust...]] But then, of course, there's also the option of [[spoiler: deciding Ulysses is right and simply [[DestructiveSaviour letting it happen]]...]]
* VideoGame/LANoire: In a flash back, Cole recalls his time fighting the Japanese on Okinawa. During a heated battle, his platoon found a cave and believing it to be filled with Japanese soldiers, [[TragicMistake orders it to be burned out with a flame thrower. It ends up being filled with wounded and civilians.]]
* The Sacrifice comic for the video game ''VideoGame/Left4Dead'' shows Zoey having this moment when she realizes what she did back home after the infection spread. [[spoiler: While Zoey was visiting her parents at home, a common infected wanders into the room and attacks Zoey's mother, infecting her. Shortly after, her mother turns and attacks her father, forcing him to kill her. Believing that he is infected, Zoey's father [[DyingAsYourself asks her to kill him before he turns]]. It isn't until 2 weeks later after she and her other survivor friends get taken by the military that she learns that she and the other survivors are [[TyphoidMary asymptomatic carriers of the infection]], and that the carrier gene [[SenselessSacrifice is passed down from the father]]...]]
* ''Videogame/SpecOpsTheLine'' has both [[BigBad John Konrad]] and [[PlayerCharacter Captain Walker]] haunted [[KillItWithFire by]] [[ColdBloodedTorture their]] [[ShootTheDog actions]]. In the case of [[spoiler: Konrad, [[DeadAllAlong he killed himself long before Walker even arrived in Dubai]]]]. [[spoiler: Walker is [[SanitySlippage driven insane]] from the realization that he killed 47 civilians with [[KillItWithFire white phosphorus]]]]. The ending [[spoiler: drives the point home, where it's revealed that Walker has been [[{{Hallucinations}} hallucinating every conversation with the dead Konrad]], because he cannot accept what he has done.]] In one of the endings, [[spoiler: [[DrivenToSuicide Walker kills himself]], or is driven so insane that [[AxCrazy he slaughters the U.S. squad sent to rescue him.]]]]
* ''VideoGame/ResidentEvil5'' has this for [[spoiler: Jill Valentine, who is brainwashed by Wesker via a device attached to her chest. After Chris and Sheva remove the device, Jill regains her senses and tells the duo that she was fully aware of what she was doing, but she had no control over herself, realizing that she could have killed them and was also responsible for everything she did under Wesker's control. Jill asks for forgiveness, to which Chris and Sheva happily agree.]]
* This [[VideoGameCrueltyPotential can be made to happen]] to [[ShrinkingViolet Hibiki Takane]] in ''VideoGame/TheLastBlade 2'', should the player decide to finish the opponent with a fatal attack. The first couple of times the player does this, Hibiki will drop her sword and shake her head in horror at what she has done while trying to convince herself that what has just happened isn't real. After the third time the player does this, [[BreakTheCutie Hibiki crosses the]] DespairEventHorizon [[TearJerker and starts crying]]... After the sixth time, [[MurderMakesYouCrazy she breaks]]... [[WhatTheHellPlayer and it's all your fault.]]
* This happens for [[Anime/MobileFighterGGundam Master Asia]] in ''VideoGame/ShinSuperRobotWars''. Master Asia first met Domon when he was building the Devil Gundam with Professor Kasshu, and immediately felt an overwhelming sense of warrior kinship. To test Domon's potential, he began the enjoyable process of training him, realizing too late that Domon proved that not all [[HumansAreFlawed humans were dangerous]]. But it was too late to prevent the completion of the Devil Gundam, which sadly took Kyouji prisoner and even survived its plunge to Earth. Then the Balmar arrived, and Master Asia saw little chance of escape or of mankind surviving. But then he realized he could use the Devil Gundam to blow away one or two of the enemy ships, and has been working hard at that ever since. But he realized another mistake: Earthlings are far more resilient than he expected. For this grave error and all the trouble stemming from it, he would normally offer his life as an apology to Domon on the spot.
* ''VideoGame/TheLastOfUs'' provides a particularly heart wrenching example with [[spoiler:brothers Henry and Sam. After escaping Pittsburgh, it is revealed that Sam was hiding a bite from the rest of the group. When Ellie is prompted by Henry to wake him, she is attacked, barely managing to hold him off before Henry puts him to rest. Henry proceeds to say to himself "Henry, what have you done?" On the verge of tears, he directs his handgun in Joel's direction before screaming "It's all your fault!" Rather than shoot Joel, however, he instead raises the handgun to his temple and pulls the trigger.]]
* ''VideoGame/LegacyOfKain'' provides a big one in Blood Omen 1 when Kain travels back in time to kill William the just before he goes corrupt. The villain uses this in the present to start a genocide against vampire kind, sparking this trope
** Also Soul Reaver 2 when Kain stops the reaver from absorbing Raziel's soul, which was exactly what the villains wanted.
* In ''VideoGame/DeusExHumanRevolution'', by using the Social Enhancer augment on [[spoiler:Hugh Darrow]] in Panchaea, you can get him to realize that [[spoiler:the true reason why he wants to destroy the augmentation technology is jealousy: he is one of the few people genetically incompatible with it, so he can not use it to fix his crippled leg — the reason why he invented it in the first place. And then murdered 100,000 people (augmented or not) to get the spotlight about it]].
** To be fair, [[spoiler:watching his "Human Augmentation" technology be twisted to the point that someone augments an A.I. by hooking up his own daughters to give her the emotion of pain (You are instructed to murder them as an act of goodness. They are in that much pain.)]] probably helped.

* The BigBrotherBully of ''VideoGame/FiveNightsAtFreddys4'' had one of these when [[spoiler: his prank turned [[DeadlyPrank deadly]] and crushed his brother's frontal lobe.]]
* Sela in ''VideoGame/StarTrekOnline'' suffers this when she ultimately realizes that [[spoiler:by turning against the Iconians in their time of need, she lead them to [[Film/StarTrek2009 the Hobus supernova and the destruction of Romulus and Remus]].]]
* In ''VideoGame/{{Undertale}}'', you get this if [[spoiler:Toriel]] kills you. [[spoiler:During her boss fight, her attacks deliberately become easy to dodge if you are at low health. [[DevelopersForesight However, it is possible to leave yourself with enough HP to kill yourself during her attack phase]], and doing so will have Toriel's expression change to a [[http://i.imgur.com/WWC20wC.jpg look of horror]] [[FreezeFrameBonus for a split-second before the Game Over screen appears]]]].
** Conversely, the ''player'' will invoke this trope on themselves if they attempt to [[spoiler:beat down Toriel until she surrenders: although many monsters can be spared if you [[TechnicalPacifist deal enough damage without killing them]], making this seem like a valid tactic, Toriel will suddenly take massively fatal damage once her HP drops low enough.]] And the worst part? [[spoiler:If you reset the game and spare Toriel after doing this, Flowey will ''mock you'' about it when you meet him at the end of the Ruins.]]
** This is also a reaction a lot of ''players'' have upon attempting or completing the No Mercy run.

* TheReveal of ''VideoGame/SilentHill2'' has James [[spoiler: reacting this way to the video of him smothering Mary.]]
** Similarly, [[VideoGame/SilentHillHomecoming Alex]] has the same response after remembering [[spoiler: that he caused his younger brother's death.]]
* In ''[[VideoGame/LifeIsStrange Life Is Strange]]'', after Kate's suicide (no matter if if's successful or averted), Victoria can be seen silently weeping, as it was her actions that helped drive Kate to killing herself.
** Chloe also has this reaction in the timeline where she kills Frank and Pompidou.
* In ''VideoGame/TownOfSalem'', if the Vigilante had killed a fellow town member, they will be horrified and be DrivenToSuicide the following night. This includes if they were targeted by a Witch.
* ''VideoGame/RandalsMonday'': Randal has a realistic one the first time Matt dies. He has two other significant ones later when [[spoiler:he gets drunk and sleeps with Sally]] and [[spoiler:agrees to feed Matt to the four horsemen of the apocalypse.]]
* ''VideoGame/SuperRobotWarsX'': [[spoiler: If Iori's the protagonist, Celric would [[AmbitionIsEvil explain his actions and apologize]] to Iori upon defeat, and wished he could've been a better BigBrotherMentor for Iori]].
* ''VideoGame/TheSpectrumRetreat'': in one of the endings, Coopers mutters this word for word upon realizing [[spoiler:she might've just helped release a would-be serial killer.]]
* ''VideoGame/RedDeadRedemption2'': Dutch van der Linde's implied reaction to [[spoiler: seeing Arthur Morgan, his adopted son, dying at his feet and telling him "I gave you all I had", and realizing that he doomed himself and the people in the gang that genuinely cared for him by trusting [[TheMole Micah]] [[TheCorrupter Bell]].]]
* The ending of ''VideoGame/OriAndTheBlindForest''. So close to achieving their goal, Ori and Sein are snatched out of the sky by Kuro, who prepares to snuff out Sein while letting Ori burn alive. Naru, Ori's mother, comes climbing out of the burning woods and takes the unconscious Ori in her hands, looking solemnly up at Kuro. With that, Kuro realizes that she has been hurting someone else's child in an attempt to save her own, and she sacrifices herself to return Sein to the spirit tree.
* Part of TheReveal in the ''VideoGame/DarkTales'' installment ''The Bells.'' One character has been slowly going mad from guilt because [[spoiler:his seemingly harmless prank with a friend - dressing up as ghosts and going around scaring people - directly led to the death of a teenage girl.]]
* In ''VideoGame/NiNoKuniIIRevenantKingdom,'' this happens with [[spoiler: the [[GoodAllAlong not-really evil]] Mausinger]]. When they realize that they were manipulated and lied to in order to make them [[spoiler: murder King Leonhard,]] and they are confronted by [[spoiler: no less than King Leonhard's spirit]] about it, they [[HeroicBSOD break down sobbing in unmitigated remorse,]] realizing that they [[spoiler: murdered their dearest and closest friend]] on false pretenses.
* The ''VideoGame/EternalSenia'' series: Magaleta has this when it affects her relationship with Senia, over multiple games:
** The first game, ''VideoGame/EternalSenia1'', she realizes just how badly [[spoiler:Senia took to being a ReplacementGoldfish and never quite accepted how much Magaleta loved her for being ''her'']], particularly in the second ending.
** ''VideoGame/EternalSeniaHydrangeaAfterTheRain'', when Aphinor grants her wish, causing [[spoiler:Senia to be possessed by Eternity]]. Magaleta claims that that wasn't what she wanted, before Aphinor replies that it is--[[spoiler:it's the result of her imposing her own desires above what Senia truly wants]].
* Siegfried of the ''VideoGame/SoulSeries'' was a knight who sought Soul Edge and his father's murderer. He succeeded in finding it and the sword possessed him, turning him into [[BigBad Nightmare]]. In truth, Siegfried [[SelfMadeOrphan murdered his own father]] and went insane hunting a man who didn't exist in denial of what he did. When he is freed from the cursed sword's control in ''III'', all the memories come flooding back and he is summarily horrified and becomes TheAtoner.
* ''VideoGame/OdinSphere'': One of the bad endings in the final book of the game pits Gwendolyn against Onyx. Onyx ends up killing Gwendolyn, and upon realizing, he lets loose a ''horrified'' expression of this trope.
* ''VideoGame/GhostOfTsushima'':
** [[spoiler: Ryuzo]] suffers remorse when they throw their lot with the Monguls and is forced as a show of loyalty to burn innocent civilians alive. They suffer a breakdown almost immediately after burning ''one'', begging the defenders of the castle to open the gates before they have to immolate the others.
** After Jin's scathing TheReasonYouSuckSpeech, [[spoiler: Shimura]] turns around and slaps Jin in a moment of anger. It's clear they regretted their actions and attempts to apologize, but Jin decides that things were over between them.

** [[spoiler:''Dracula'']] has a mild one. Following his defeat at the hands of Alucard, he is unable to respond when [[spoiler:his son accuses him of sacrificing all he held dear in a bid for power. Upon Alucard telling him what his wife's last words were, all he can is quietly beg for her forgiveness, bid his son farewell, and finally succumb as he's banished yet again.]]

* Richter Belmont in ''VideoGame/CastlevaniaSymphonyOfTheNight'' ''screams'' this once he's freed from being BrainwashedAndCrazy, since he's inadvertently helped resurrect {{Dracula}} once again.

** Mido, the self-established leader of the Kokiri, comes to regret his mistreatment of Link later in life. If Link talks to Mido after defeating [[FinalBossPreview Phantom Ganon]], he'll ask him to tell Link that he's sorry for the way he treated him, not realizing that he ''is'' talking to Link, grown up.

* ''VideoGame/ResidentEvil5'' has this for [[spoiler: Jill Valentine, who is brainwashed by Wesker via a device attached to her chest. After Chris and Sheva remove the device, Jill regains her senses and tells the duo that she was fully aware of what she was doing, but she had no control over herself, realizing that she could have killed them and was also responsible for everything she did under Wesker's control. Jill asks for forgiveness, to which Chris and Sheva happily accept.]]