History MyGodWhatHaveIDone / VideoGames

* ''Franchise/SonictheHedgehog'': In ''VideoGame/SonicAdventure2'', Tails responds with jaw-dropping, wide-eyed shock after he accidentally tells Eggman [[spoiler:that the chaos emerald Sonic gave him is a fake]]. Sonic is blast into space shortly after, and it's obvious that the fox feels somewhat responsible for it.

* In ''VideoGame/HeroesOfTheStorm'' when Illidan Stormrage kills Tyrande Whisperwind, his sister-in-law and the love of his life, he pauses in disbelief at his actions, before yelling "WHAT HAVE I DONE!?"

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

* 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]]...]]
* Similar to ''VideoGame/ShadowOfTheColossus'', ''VideoGame/FarCry2'' seems to be designed to eat away at the player until they realise just how many people they're butchering and what a monster they are, resulting in a [[MyGodWhatHaveIDone My God, What am I doing?]] moment.
** Doubly so if you live in Africa. You watch yourself do all that crap to people in '''YOUR''' country with languages '''YOU''' understand. It makes playing the game absolute hell.
* A frighteningly effective one in ''VideoGame/FarCry3'': protagonist Jason is undercover in the crew of pirates, murderers and mercenaries of the BigBad, and he gets a mission to torture the crap out of a prisoner. He goes to do so and finds out that it's [[spoiler: his brother Riley, whom he previously thought dead]]. After a very brief attempt at explanation, he then beats the crap out of the prisoner, and shoves his thumb into a gunshot wound, causing excruciating pain. After the fact, Jason looks at his hands, covered in [[spoiler: his brother's]] blood, and says "What have I become?" After spending most of the game on a revenge-fueled murder spree, it's almost disturbingly sobering.
** And the worst part? He did that to maintain his guise. He did that to gain the trust of the BigBad. He did that [[spoiler:''for nothing'', as said BigBad knew about the infiltration long before, and just wanted to see how far down the rabbit hole you'd go to keep a supposed advantage over himself.]] Like other moments in the game, the whole thing served to show how dehumanized Jason Brody became.

* ''VideoGame/BatmanArkhamKnight'': In an EvenEvilHasStandards moment, members of the Arkham Militia may say this [[spoiler:when the Cloudburts detonates]]:
-->"Guys... what have we done?"

* In ''Destroy All Humans! 2'', a minor antagonist, hippie guru and activist leader Coyote Bongwater, does this after realizing he's been manipulated by the Soviets into unknowingly aiding them with their plans to destroy America. His guilt is short-lived, though, as Crypto kills him shortly after.

* 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/TheLastofUs2'' After Ellie [[spoiler:kills Owen and Mel when they attempt to attack her, she suddenly begins muttering "no, no, no" and goes over to Mel's dead body. Pushing her over, she realizes she is pregnant and begins to have a panic attack, horrified by what she has done.]]
* ''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/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.

* In the 2022 remake of ''VideoGame/LiveALive'', a pretty big one of these is let out by [[spoiler:Oersted]] after defeating the TrueFinalBoss.
-->'''[[spoiler:Oersted]]''': "Are these my hands, stained black with blood and sin? What wickedness I've wrought. And all for what?"

* Admiral [=DuGalle=] in ''VideoGame/StarCraft'', 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/Sonic the Hedgehog'': In ''VideoGame/SonicAdventure2'', Tails responds with jaw-dropping, wide-eyed shock after he accidentally tells Eggman [[spoiler:that the chaos emerald Sonic gave him is a fake]]. Sonic is blast into space shortly after, and it's obvious that the fox feels somewhat responsible for it.

* ''Franchise / Sonic the Hedgehog'': In ''VideoGame/SonicAdventure2'', Tails responds with jaw-dropping, wide-eyed shock after he accidentally tells Eggman [[spoiler:that the chaos emerald Sonic gave him is a fake]]. Sonic is blast into space shortly after, and it's obvious that the fox feels somewhat responsible for it.

* ''VideoGame/SonicTheHedgehog'': In ''VideoGame/SonicAdventure2'', Tails responds with jaw-dropping, wide-eyed shock after he accidentally tells Eggman [[spoiler:that the chaos emerald Sonic gave him is a fake]]. Sonic is blast into space shortly after, and it's obvious that the fox feels somewhat responsible for it.

* Zero's [[{{Narm}} epic meltdown]] in ''VideoGame/MegaManX4'' after his defeat of [[spoiler:Iris]]. [[https://www.youtube.com/watch?v=LISmPmdUhYA "What am I fighting foooooooor?!?!?!"]]

-->"Guys...what have we done?"

* ''VideoGame/TheLastofUs2''After Ellie [[spoiler:kills Owen and Mel, she begins muttering "no, no, no" and goes over to Mel's dead body. Pushing her over, she realizes she is pregnant and begins to have a panic attack, horrified by what she has done.]]

* In ''VideoGame/HeroesOfTheStorm'' when Illidan Stormrage kills Tyrande, his sister-in-law and the love of his life, he pauses in disbelief at his actions, before yelling "WHAT HAVE I DONE!?"