History Main / MutualKill

* ''VideoGame/XenobladeChronicles2'': Mikhail of Torna, fresh off a HeelFaceTurn, decides to pull a HeroicSacrifice for the heroes ''and'' his Torna comrades by piloting [[HumongousMecha the Marsenes]] directly at the [[OurDragonsAreDifferent Indoline Titan]] to stop [[SinisterMinister Amalthus]], as well as some personal payback for Amalthus' various actions against him including horrible experimentation and killing a lot of his friends and surrogate family. They get into a tussle and he launches his final attack as tries to fire its BreathWeapon and both of them are destroyed by a massive explosion. [[spoiler:Ironically, however, his intended target of Amalthus survives and goes on to menace the heroes for a final confrontation, and as revealed in NewGamePlus even Mikhail himself survived his HeroicSacrifice.]]

* ''VideoGame/XenobladeChronicles2'': [[spoiler:Mikhail of Torna, fresh off a HeelFaceTurn, decides to pull a HeroicSacrifice for the heroes ''and'' his Torna comrades by piloting [[HumongousMecha the Marsenes]] directly at the [[OurDragonsAreDifferent Indoline Titan]] to stop [[SinisterMinister Amalthus]], as well as some personal payback for Amalthus' various actions against him including horrible experimentation and killing a lot of his friends and surrogate family. They get into a tussle and he launches his final attack as tries to fire its BreathWeapon and both of them are destroyed by a massive explosion. Ironically, however, his intended target of Amalthus survives and goes on to menace the heroes for a final confrontation, and as revealed in NewGamePlus even Mikhail himself survived his HeroicSacrifice.]]

* ''Franchise/StarWarsExpandedUniverse'': In ''[[Literature/StarWarsAhsoka Ahsoka]]'', it's {{Invoked|Trope}} by Ahsoka and Rex when FakingTheDead. They create a fake grave for Rex with a headstone claiming that he died killing her.

*** ''Literature/TheFallOfGondolin'': Elven warrior Glorfindel slays a Balrog by throwing himself and the demon off a mountainside.

* Boyd and Ives fight to the mutual death in the climax of ''Film/Ravenous1999''.

* ''{{Film/Sweetwater}}'': [[spoiler: Josiah and Jackson]] manage to shoot each other dead simultaneously near the end of the film.

* ''Film/VForVendetta'': V manages to kill Creedy before succumbing to bullet wounds. It was Creedy's mooks who shot him, but it's this trope in spirit.

%%* Myth/KingArthur and Mordred.

%%* ''Literature/NeedfulThings'': Several examples.

** In the [[Series/GameOfThrones TV series]], Clegane instead crushes Oberyn's skull with his bare hands, while indulging Oberyn and confessing his crimes (the only reason Oberyn even got close enough to be tripped is to hear Clegane confess to raping and murdering his sister). However, in the season finale, we see Oberyn's poison seems to be having the same effect as in the books.

** ''Literature/TheSilmarillion'':
*** Gothmog gives Ecthelion several wounds, but Ecthelion charges at Gothmog, impaling him with the spike on his helmet and knocking them both into a fountain where they both drown.
*** Glorfindel perishes while slaying another unnamed Balrog.

* In [[Myth/ClassicalMythology Greek Mythology]], Oedipus's sons, Polyneices and Eteocles, killed each other. King Creon's prohibition of the former's burial due to him turning his back on the kingdom would set up the plot of ''Theatre/{{Antigone}}''.
* ''Literature/TheBible'': In 2nd Samuel 2:12-16, David's army (under Joab's command) and Ishbosheth's army (under Abner's command) meet at the pool of Gibeon and have a contest of twelve soldiers each from both armies. As verse 16 states, "Each one grabbed his opponent by the head and thrust his sword in his opponent’s side; so they fell down together. Therefore that place was called Helkath Hazzurim, which is at Gibeon."

** Spike and Vicious accost each other within lethal striking distance inside a cathedral in Episode 5 -- [[GunsVsSwords Spike with a Jericho pistol, and Vicious wielding a katana]]. Each strikes the other simultaneously in the shoulder. Using the arm of his other shoulder, Vicious grabs Spike's head and lifts him so that the latter's back faces a window mosaic three stories above the ground. Vicious then throws him through the window. As he breaks the window, Spike leaves a pinless grenade behind before he falls to the ground below. [[spoiler: [[ShrugOfGod Whether or not the results of these interactions kill the both of them is left to viewer discretion]]: [[AllJustADream the remaining episodes may be Spike's dream in an afterlife]], from a certain perspective.]]
** Whatever you believe of Episode 5, in Episode 26, Spike struggles with Vicious again, both with their respective weapons, until each has the other's weapon. In the subsequent moment, Spike tells Vicious [[spoiler: [[LoveInterests Julia]] is dead]]. Vicious acknowledges him. [[ExaggeratedTrope Each returns the other's weapon]], and both strike severely. Vicious keels over immediately, dead; while walking away from Vicious, Spike collapses forward as well, ([[PlayingWithATrope his fate unknown]]).

* In ''BladeRunner2049'' K manages to drown Luv in a fight, but not before Luv mortally wounds him causing him to bleed out and die by the end of the film.

* In ''[[https://www.fanfiction.net/s/11711732/1/The-Mad-Scrapper The Mad Scrapper]]'', [[WesternAnimation/ThomasAndFriends Diesel 10’s]] sister Daniella loses her mind and massacres several other engines, including Sidney, Paxton, and Percy, and Diesel. Diesel 10 confronts his now murderous sister on the Sodor Suspension Bridge, and they both use their claws against each other. The fight ends with Daniella [[DisneyVillainDeath being knocked off the bridge to her death]] by her brother, but by then, she had already fatally damaged him.

* It took a while for the second half to come about but before the British battlecruiser HMS ''Invincible'' got fireballed at Jutland, she was on a roll, doing most of the damage that caused SMS ''Lutzow'' to not make it home.

* One June 4th, 1983, law enforcement searched a house in Smithville, Arkansas, looking for Gordon Kahl, a tax evader who had killed two US Marshals in a shootout that February. During the search, Kahl fired off a shot, mortally wounding Lawernce County Sherriff Harold Gene Matthews in the chest, who fired off a shot that struck Kahl in the head, killing him instantlly. Matthews was able to stagger out of the house and say "I got him" before succumbing to his wounds.

** Also happens in ''VideoGame/WorldOfWarships'', even more than ''[=WoT=]'' due to damage over time elements being more prevalent. It's not uncommon for a ship to take out an enemy, only to go down a short time later due to fire/flood damage, or the volley of torpedoes launched a few seconds earlier. And of course, [[RammingAlwaysWorks Ramming is always an option:]] both ships involved in a ram deal damage to each other equal to their own max health. This is actually a valid late-game tactic if there are only a few ships left on each side, and your team is ahead on points, but the score is still relatively close and the clock is running low. Dying in a ramming attack will award the enemy team points for your ship, but it will also award your team points for destroying the enemy ship. If they're the only ship left on the enemy team, or if you're confident that your teammates can finish off whoever remains, it prevents them from staging any last-second comebacks.

** In ''Franchise/{{Splatoon}}'', even the basic [[StandardFPSGuns assault-rifle-equivalent weapons]] have projectiles just slow enough for this to happen with considerable frequency thanks to the series' RocketTagGameplay. The most amusing occurance of this tends to be when two Roller users collide head-on.

* ''ComicBook/IdentityCrisis'': It happens with the third ComicBook/{{Robin}}'s father Jack Drake and Captain Boomerang.

** ''ComicBook/TheDeathOfSuperman'': Superman and Doomsday punch each other to death.

* In the first half of the ''Series/PowerRangersInSpace'' finale [[Recap/PowerRangersInSpaceS1E42CountdownToDestructionPart1 Countdown to Destruction]]", [[TheStarscream Darkonda]] makes his final bid to grab power by blasting Dark Specter with a planet-destroying missile. Unfortunately, Dark Specter then uses the last of his strength [[EatenAlive to devour Darkonda's ship]] just before he exploded, [[TakingYouWithMe taking Darkonda with him]].

** The final episode has an example with Knightmare Frames. Kallen Kozuki thrusts her Guren S.E.I.T.E.N.'s claw arm at Suzaku Kururugi's Lancelot Albion as it fires its Slash Harkens into the Guren's neck, shutting it down. When Kallen despairingly thinks she failed to take him out, Suzaku confirms in a defeated voice that she indeed got him. Cut to the Guren's claw impaling the Lancelot. [[PostVictoryCollapse While Kallen faints]] and she and the deactivated Guren summarily fall into the arms of Gino Weinberg and his damaged Tristan Divider, [[DefeatEqualsExplosion the Lancelot violently explodes]], [[NoOneCouldSurviveThat presumably killing Suzaku.]] [[spoiler:It's revealed that Suzaku survives.]]

* Myth/KingArthur and Mordred. Specifically, Arthur, after their lengthy battle, [[ImpaledWithExtremePrejudice rams his lance through Mordred's body]]. Mordred, running on [[ThePowerOfHate willpower and hatred alone]], manages to [[PullYourselfDownTheSpear drag himself down the shaft]], bring his sword down on Arthur and deliver his own fatal blow before expiring.

* Happens in ''ComicBook/IdentityCrisis'' with the [[ComicBook/RobinSeries third Robin]]'s father Jack Drake and Captain Boomerang. Boomerang [[ComicBook/BlackestNight would]] [[BackFromTheDead return]]. (No pun intended)

* ''Franchise/{{Superman}}'':
** Superman and Doomsday, in ''ComicBook/TheDeathOfSuperman'', pictured above. They both [[BackFromTheDead got better]].
** ''ComicBook/WhateverHappenedToTheManOfTomorrow'' has ''two'' Mutual Kills. First, the Parasite and Terra-Man, who were two of Superman's most persistent Silver Age foes, do not appear in the story. During Lois Lane's exposition opening about what things were like during Superman's final days, she mentions that the two villains killed each other in a massive fallout. Later, Krypto attacks Kryptonite Man, who screams that Krypto will die if he continues to attack him. Krypto doesn't care, however, and rips out Kryptonite Man's throat before finally keeling over from fatal Kryptonite poisoning.

* ''Franchise/WonderWoman'':
** ''ComicBook/WonderWoman1987'': When Circe brainwashes Superman into attacking New York Wonder Woman, ComicBook/{{Oracle}} and ComicBook/WonderGirl all realize Diana and Clark will kill each other in the ensuing fight if they don't find a way to snap Clark out of it. Luckily Diana is able to recover her lasso and snag him in it undoing the brainwashing before they do too much damage to each other.

** In ''Franchise/{{Splatoon}}'', even the basic [[StandardFPSGuns assault-rifle-equivalent weapons]] have projectiles just slow enough for this to happen with considerable frequency. This is also what happens if two Roller users collide head-on.

** In ''[[Anime/CodeGeassAkitoTheExiled Akito the Exiled]]'', [[TheDragon Jean Rowe]] allows herself to be [[ImpaledWithExtremePrejudice stabbed]] by [[BigBad Shin Hyuga Shaing]] in order to stop him from killing Akito, using the chance to fatally shoot Shin point-blank.

** Unusual twist: former allies turned enemies Demona and Macbeth are both immortal and will simply return to life no matter how they "die" unless one kills the other, which will cause them both to die. Demona takes advantage of this to remain essentially immortal; Macbeth, on the other hand, has dedicated the last century or so to tracking her down and killing her so he can finally have peace.

* In the ''ComicBook/OldManLogan'' series, Logan decapitates the Maestro (a future corrupt Bruce Banner/Hulk) however Logan's compromised healing factor gives out and he dies from the injuries he suffers a few seconds later.

** In ''VideoGame/{{Splatoon}}'', even the basic [[StandardFPSGuns assault-rifle-equivalent weapons]] have projectiles slow enough for this to happen with considerable frequency. This is also what happens if two Roller users collide head-on.

* The ''ComicBook/{{Northlanders}}'' story "The Viking Art of Single Combat" is a tale of a trial by combat that, with grim irony, ends in a Mutual Kill.

* In ''Film/PrinceOfPersiaTheSandsOfTime'', [[KnifeNut Seso]] can throw any blade with surgical precision. He faces off against a Hashanshin firing bolts out of a wrist-mounted automatic crossbow. Seso has one blade left, so he jumps out of the column, runs, aims and throws it, while the Hashanshin is firing bolts at him. The blade flies true and kills the bad guy. Then Seso looks down and sees bolts embedded in his chest. He manages to throw the Dagger of Time off the tower before dying. Luckily, the ResetButton is pushed.