History CainAndAbel / VideoGames

** In the original timeline, Mileena is an EvilTwin knockoff to Kitana and wants to kill her. Averted in the new timeline, as Mileena has genuinely gotten AdaptationalHeroism, in addition to being actually Kitana's biological sister and is in better terms with her, albeit Mileena is still HotBlooded, and is infected with the Tarkat disease which causes her quite a lot of issues.
** Also in VideoGame/MortalKombat1, again between Bi-Han (again, as Sub-Zero) and Kuai Lang (who now takes the mantle of Scorpion), this time because [[spoiler:Bi-Han betrays and turns against Kuai Lang, cementing the former's FaceHeelTurn as well.]]

* In ''VideoGame/KidIcarus'', Palutena and {{Medusa}}, sister goddesses of light and darkness respectively, have this type of relationship. It's not hard to guess which one is the [[DarkIsEvil evil one.]] It's subverted in that Palutena did not kill her herself, she only turned her into a monster and banished her. The angel Pit [[DidYouJustPunchOutCthulhu finished]] the [[KillTheGod job.]]

* ''VideoGame/BaldursGate'' plays this trope straight in the first game, then takes it to its logical extreme in ''VideoGame/BaldursGateIIThroneOfBhaal'', wherein five of the six required bosses are siblings of the player [[spoiler:and of Imoen, who may or may not be in the party]].

** Mileena is an EvilTwin knockoff to Kitana and wants to kill her.

*** This happens to no end to Cecil. His best friend and comrade in arms who [[RivalTurnedEvil betrays him]] is actually 'named" Cain. (Kain in the original North American release, because I guess it was too obvious ''otherwise?''). [[spoiler: The second time it was revealed that BigBad Golbez was his ''actual'' brother.]] Of course, it was revealed in the end that [[spoiler: both were actually just being mind-controlled by TheManBehindTheMan]]. And to drive the point home, you can not only get Kain's Lance but Abel's Lance in a bonus dungeon of the GBA version.

** ''VideoGame/FireEmblemGenealogyOfTheHolyWar'': First the brothers of RebelPrince Jamke are brutish pawns of a cult. Afterwards comes Andrey, the younger brother of Briggid, [[SelfMadeOrphan who killed his own father]] [[TheEvilPrince to get the title of Duke]]. There's also Danann, the evil brother of [[MadScientistsBeautifulDaughter Mad Dictator's Handsome Son]] Lex. Similarly, MadScientistsBeautifulDaughter Tailtiu's brother Bloom [[OverlordJr took after their father]]. At the end of the WhamEpisode, Arvis betrays and orders the executions of his own half-brother Azelle ([[spoiler:and all of your other guys for good measure]]). Only one of the pair of Iuchar and Iucharba can be recruited, making the non-recruited one turn against his brother. Near the end, Brian, the [[YoungerThanTheyLook emancipated]] but [[TheBrute super]] [[MusclesAreMeaningless strong]] brother of Iuchar/Iucharba, shows up for revenge. Prince Julius is the inbred vassal of [[SealedEvilInACan Loptous]] who (barring CherryTapping) needs to be killed with Naga and wields dark magic, and he comes into conflict with both his twin sister Princess Julia who is good [[spoiler:when she is not brainwashed]] and has the Naga light magic and his maternal half-brother [[spoiler:Seliph]]. Yes, ''Genealogy of the Holy War'' IS creepy.

** In ''VideoGame/FireEmblemTheBindingBlade'' there's [[StrawNihilist Nietzsche Wannabe]] King Zephiel and his much gentler half-sister, Princess Guinevere. They did not start out that way, being very close in their childhood, but after an assassination attempt by his own father, Zephiel became embittered and eventually drove his sister away.

* In ''[[VideoGame/SoulSeries SoulCalibur]]'' ''V'', Sophitia's children Patroclus and Pyrrha are driven to this [[spoiler:thanks to being egged on by Soul Calibur and Soul Edge respectively. Fortunately, the siblings are strong enough to eventually overcome the influence of both swords for each others' sake]].
** ''Soulcalibur IV'' Sophitia becomes the Cain to Cassandra's Abel, but not willing because she has been ForcedIntoEvil.

* ''VideoGame/XenoGears'' has a character named Abel, and a character named Cain. Cain was (indirectly) the one who killed Abel. [[FauxSymbolism That's about where the similarities end.]]

* ''VideoGame/BlazBlue'':

** ''VideoGame/FireEmblemGenealogyOfTheHolyWar'': First the brothers of RebelPrince Jamke are brutish pawns of a cult. Afterwards comes Andrey, the younger brother of Briggid, [[SelfMadeOrphan who killed his own father]] [[TheEvilPrince to get the title of Duke]]. There's also Danann, the evil brother of [[MadScientistsBeautifulDaughter Mad Dictator's Handsome Son]] Lex. Similarly, MadScientistsBeautifulDaughter Tailtiu's brother Bloom [[OverlordJr took after their father]]. At the end of the WhamEpisode, Arvis betrays and orders the executions of his own half-brother Azelle ([[spoiler:and all of your other guys for good measure]]). Only one of the pair of Iuchar and Iucharba can be recruited, making the non-recruited one turn against his brother. Near the end, Brian, the [[YoungerThanTheyLook emancipated]] but [[TheBrute super]] [[MusclesAreMeaningless strong]] brother of Iuchar/Iucharba, shows up for revenge. Prince Julius is the inbred vassal of [[SealedEvilInACan Loptous]] who (barring CherryTapping) needs to be killed with Naga and wields dark magic, and he comes into conflict with both his twin sister Princess Julia who is good [[spoiler:when she is not brainwashed]] and has the gamebreaking Naga light magic and his maternal half-brother [[spoiler:Seliph]]. Yes, ''Genealogy of the Holy War'' IS creepy.

** ''VideoGame/FireEmblemGenealogyOfTheHolyWar'': First the brothers of RebelPrince Jamke are brutish pawns of a cult. Afterwards comes Andrey, the younger brother of Briggid, [[SelfMadeOrphan who killed his own father]] [[TheEvilPrince to get the title of Duke]]. There's also Danann, the evil brother of [[MadScientistsBeautifulDaughter Mad Dictator's Handsome Son]] Lex. Similarly, MadScientistsBeautifulDaughter Tailtiu's brother Bloom [[OverlordJr took after their father]]. At the end of the WhamEpisode, Arvis betrays and murders his own half-brother Azelle ([[spoiler:and all of your other guys for good measure]]). Only one of the pair of Iuchar and Iucharba can be recruited, making the non-recruited one turn against his brother. Near the end, Brian, the [[YoungerThanTheyLook emancipated]] but [[TheBrute super]] [[MusclesAreMeaningless strong]] brother of Iuchar/Iucharba, shows up for revenge. Prince Julius is the inbred vassal of [[SealedEvilInACan Loptous]] who (barring CherryTapping) needs to be killed with Naga and wields dark magic, and he comes into conflict with both his twin sister Princess Julia who is good [[spoiler:when she is not brainwashed]] and has the gamebreaking Naga light magic and his maternal half-brother [[spoiler:Seliph]]. Yes, ''Genealogy of the Holy War'' IS creepy.

*** Narrowly suberted early on. Clive, who has been enslaved by the Holy Empire of Sanbreque, is ordered to assassinate Shiva's Dominant. It isn't until he's incapacitated her in combat that he realizes that the Dominant is actually Jill Warrick, his long-lost foster sister. [[BigBrotherInstinct Fortunately, Clive chooses that moment to go rogue rather than murder possibly the only remaining link to his old life.]]
*** After defeating Garuda, Clive learns that [[spoiler:he himself is Ifrit's Dominant, and concludes that he killed his own brother Joshua]].

** Narrowly subverted early in ''VideoGame/FinalFantasyXVI''. Clive, who has been enslaved by the Holy Empire of Sanbreque, is ordered to assassinate Shiva's Dominant. It isn't until he's incapacitated her in combat that he realizes that the Dominant is actually Jill Warrick, his long-lost foster sister. [[BigBrotherInstinct Fortunately, Clive chooses that moment to go rogue rather than murder possibly the only remaining link to his old life.]]

* This happened to no end to Cecil in ''VideoGame/FinalFantasyIV''. His best friend and comrade in arms who [[RivalTurnedEvil betrays him]] is actually 'named" Cain. (Kain in the original North American release, because I guess it was too obvious ''otherwise?''). [[spoiler: The second time it was revealed that BigBad Golbez was his ''actual'' brother.]] Of course, it was revealed in the end that [[spoiler: both were actually just being mind-controlled by TheManBehindTheMan]].
** In the DS version, it is revealed that [[spoiler:Golbez, known way back as Theodor, was compelled by Zemus to abandon his baby brother in the woods outside Baron. If you're wondering why Cecil thinks the king as his own father up until TheReveal, now you know]].
** [[spoiler:To be fair to Golbez, he pretty much makes up for being the Cain in the Sequel when he performs a HeroicSacrifice. Even in the CrisisCrossOver ''VideoGame/DissidiaFinalFantasy'' he ends up being the game's StealthMentor.]]
** And to drive the point home, you can not only get Kain's Lance but Abel's Lance in a bonus dungeon of the GBA version.
** Interestingly, ''VideoGame/DissidiaFinalFantasy'' reveals a similar relationship between [[spoiler: Chaos and ''[[VideoGame/FinalFantasyI Final Fantasy I's]]'' Warrior of Light]]. The twist being that neither knows of the connection.

*** In Claude's backstory, he was abused by his [[spoiler:Almyran]] half-brothers. In ''VideoGame/FireEmblemWarriorsThreeHopes'', one of them (Khalid) actually attacks Leicester and serves as a recurring personal enemy to Claude.

* MickeyMouse and his older [[LongLostRelative half-brother]] WesternAnimation/OswaldTheLuckyRabbit are this in ''VideoGame/EpicMickey''.