History Main / KillingYourAlternateSelf

* PlayedForLaughs in TheStinger to ''Film/Deadpool2'', [[spoiler:where Deadpool uses a time machine to kill the Weapon XI/Deadpool at the end of ''Film/XMenOriginsWolverine'' as well as killing his own actor Creator/RyanReynolds for accepting the script to ''Film/GreenLantern'']].

* ''VideoGame/{{MGCM}}'' has several instances:
** [[PlayerVersusPlayer The Sabbath battles]] seem to imply this as the way to determine the winners, applying ''[[KillEmAll both to the magical girls and to Omnis/Tobio]]''... all the way to ThereCanBeOnlyOne. Since this happens to be just an ExcusePlot for the game's PlayerVersusPlayer mode, and it is [[BigLippedAlligatorMoment brought up only briefly before vanishing from the story again]], it's not uncommon among fans to ignore this concept and theorize [[AllianceOfAlternates a less horrifically violent and dark solution to the multiverse's issues]].

** And again in the ''Series/StarTrekTheNextGeneration'' episode "Parallells", Worf has an encounter with a quantum fissure and ends up travelling through different parallell universes. Later in the episode, the Enterprise has an encounter with numerous parallell unvierse versions of the ship after it has a mishap involving said quantum fissure. Worf gets sent to the fissure with a shuttlecraft from his Enterprise, only to get shot at by an Enterprise from a timeline where the Borg succeeded in conquering the Federation. This leads to Riker from the Enterprise that Worf ended up on ordering Wesley to disable that other Enterprise, which leads to the other Enterprise being blown up from how weak it had become from fighting the Borg.

* ''[[Manga/FutureDiary Mirai Nikki]]'' has [[spoiler: the [[TropeCodifier trope-codifying]] resident {{Yandere}}, Yuno Gasai, who murdered her counterpart in the 2nd world, and wound up overwriting her 3rd world counterpart somehow, all so she could be with Yukiteru]].

** Implied. Killing demons that have [[spoiler:hairstyles similar to certain heroines]] also count. As the main story reveals that [[spoiler:a number of demons the heroines fight are alternate selves from several [[AlternateUniverse parallel worlds]] who are slain and corrupted by [[TheVirus demons and other demonized selves]], and [[AndThenJohnWasAZombie these victims include the ones from the protagonist's party]]]].

** Implied. Killing demons that have [[spoiler:hairstyles similar to certain heroines]] also count.

* ''VideoGame/{{MGCM}}'' has several instances

* This is a plot point and game mechanic in ''VideoGame/StarRenegades''. The game begins with the mysterious Imperium taking a particular interest in killing the protagonist's brother. [[spoiler: The Imperium is the military of an alternate universe, and the laws of the reality prevent more than one version of a person existing within the same universe. The aforementioned brother is the current leader of the Imperium, and needed to kill his doppelganger to come through. In all runs after the first successful one, a random character is chosen to be leader, preventing the player from using that character in their team. ]]

* In ''VideoGame/{{MGCM}}'' Chapter 13 onwards, [[spoiler:Omnis (except his heroines) gets trapped into a battle royal-esque DeadlyGame in the [[CrapsackWorld hellish]] DarkWorld where the magical heroines' [[AlternateSelf alternate selves]] from several {{alternate universe}}s kill against their alternate selves from other universes. Even worse, lots of demons, [[DemonOfHumanOrigin including heroines' demonized alternate selves]], are in that universe, and kill some of the heroines' alternate selves. LightNovel/MagicalGirlRaisingProject, everyone?]]

* In ''VideoGame/{{MGCM}}'' Chapter 13 onwards, [[spoiler:Omnis (except his heroines) gets trapped into a battle royal-esque DeadlyGame in the [[CrapsackWorld hellish]] DarkWorld where the magical heroines' [[AlternateSelf alternate selves]] from several {{alternate universe}}s kill against their alternate selves from other universes. Even worse, lots of demons, [[DemonOfHumanOrigin including heroines' demonized alternate selves]], are in that universe, and kill some of the heroines' alternate selves. ''LightNovel/MagicalGirlRaisingProject'', everyone?]]

* In ''VideoGame/{{MGCM}}'' Chapter 13 onwards, [[spoiler:Omnis (except his heroines) gets trapped into a battle royal-esque DeadlyGame in the [[CrapsackWorld hellish]] DarkWorld where the magical heroines' [[AlternateSelf alternate selves]] from several {{alternate universe}}s kill against their alternate selves from other universes. Even worse, lots of demons, [[DemonOfHumanOrigin including heroines' demonized alternate selves]], are in that universe, and kill some of the heroines' alternate selves.]]

* In ''VideoGame/{{MGCM}}'' Chapter 13 onwards, [[spoiler:Omnis (except his heroines) gets trapped into a battle royal-esque DeadlyGame in the [[CrapsackWorld hellish]] DarkWorld where the magical heroines' [[AlternateSelf alternate selves]] from several {{alternate universe}}s '''[[KillingYourAlternateSelf kill]]''' against other alternate selves from other universes. Even worse, lots of demons, [[DemonOfHumanOrigin including heroines' demonized alternate selves]], are in that universe, and kill some of the heroines' alternate selves.]]

* In ''VideoGame/{{MGCM}} Chapter 13 onwards, [[spoiler:Omnis (except his heroines) gets trapped into a battle royal-esque DeadlyGame in the [[CrapsackWorld hellish]] DarkWorld where the magical heroines' [[AlternateSelf alternate selves]] from several {{alternate universe}}s '''[[KillingYourAlternateSelf kill]]''' against other alternate selves from other universes. Even worse, lots of demons, [[DemonOfHumanOrigin including heroines' demonized alternate selves]], are in that universe, and kill some of the heroines' alternate selves.]]

* ''TabletopGame/Warhammer40K'': When Waaagh! Grizgutz started out, Warp currents made it return to realspace moments before it could leave. Orks being orks, they attacked each other/themselves, with the future Grizgutz attacking and killing his past self so as to have two sets of his favorite gun. [[TemporalParadox The Waaagh! kind of fell apart in the ensuing confusion.]]

Compare and contrast the GrandfatherParadox when the alternate self you're killing is from your own past.

[[quoteright:350:[[WesternAnimation/TheLegendOfZelda https://static.tvtropes.org/pmwiki/pub/images/zelda.PNG]]]]
[[caption-width-right:350:Killing your doppleganger? Well, ''[[CatchPhrase excuse me, princess!]]'']]

Oddly enough FearfulSymmetry will often (but not always) fail to end in this, and given the set-up, it's also surprising that there isn't more KillAndReplace involved.

-->-- ''Podcast/WelcomeToNightVale''

* In an overlap with DoppelgangerAttack Suzaku from ''Manga/YuYuHakusho'' could create seven identical copies of himself, each with all of his strength. [[NoConservationOfEnergy In stark violation of the Law of Conservation of Energy]], he could then reabsorb those copies to completely replenish his strength, enabling him to fight forever. Since the copies were apparently sentient exact duplicates that he controlled via his antenna, their fate as a walking energy-bar is more than a little disturbing.