->''"The trouble with Scotland is that it's full of Scots!"''
-->-- '''[[UsefulNotes/EdwardTheFirst King Edward I (Longshanks)]]''', ''Film/{{Braveheart}}''

One side attempts to kill (almost) everyone on the opposite one based on their background. Most of these can be described as genocide, or sometimes even omnicide in more [[SpeculativeFiction speculative works]].

Motivations vary, but they most commonly tend to be employed by either xenophobic racists, [[FantasticRacism fantastic]] or otherwise, or by the heroes against [[AlwaysChaoticEvil groups of beings who are (perceived to be) all pure evil]]. The former will often signify a crossing of the MoralEventHorizon, the latter makes the protagonists morally grey {{Pragmatic Hero}}es depending on how the work handles the implications of such an extreme action.

See also MurderTropes, PrejudiceTropes, and {{Reichstropen}}.
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!!Tropes:
[[index]]
* AbsoluteXenophobe: A group kills everyone who is not part of their kind.
* BiologicalWeaponsSolveEverything: Using a biological weapon (weaponized disease) to wipe out the enemy.
* DeathMarch: If large numbers of people from a targeted ethnic group are forcibly exiled from their lands in lethal conditions, then it can cross over to genocidal ethnic cleansing.
* FamilyExtermination: Attempting to eradicate an entire bloodline.
* TheFamine: Although most famines result from natural or accidental causes, it can sometimes be intentionally planned (or at least maliciously neglected) by the government in efforts to allow entire communities to fatally starve.
* FinalSolution: A plan to commit a complete genocide to permanently eliminate all "undesirable" people.
* {{Gendercide}}: Extermination of an entire gender/sex.
* GenocideBackfire: An attempted genocide ends with vengeful survivors now seeking retribution on those responsible for destroying their people.
* GenocideDilemma: The hero can't decide whether the best way to deal with the AlwaysChaoticEvil race is to wipe them out completely.
* GenocideFromTheInside: Someone decides to destroy ''their own people''.
* GenocideSurvivor: Someone who lived through a genocide.
* TheGreatExterminator: Someone is famed for wiping out a pestilent species.
* GuiltFreeExterminationWar: An all-out war that won't end until one side is totally exterminated.
* InferredHolocaust: The work glosses over the fact that certain events have the most likely outcome of many people dying.
* KillAllHumans: Attempting to destroy all of humanity.
* LeaveNoSurvivors: The aim of many planned genocides is the ''complete'' annihilation of an ''entire'' category of people (whether they succeed at doing so is another matter).
* ANaziByAnyOtherName: Someone demonstrates [[ThoseWackyNazis Nazi-like characteristics]], such as [[PoliticallyIncorrectVillain extreme racial hatred]] and a desire to [[FinalSolution exterminate everyone they despise]].
* NiceJobBreakingItHerod: The villain fails to kill a certain child during a massacre, who is destined to ultimately defeat him.
* OmnicidalManiac: The villain wants to kill everyone and destroy everything in the whole world (or known universe).
* PoliticallyIncorrectVillain: You'd have to be both extremely evil and bigoted if you're willing to destroy an entire race of people.
* ThePurge: An organization decides to eliminate every single member who dissents with them.
* RapePillageAndBurn: An evil army decides to burn a whole city or town to the ground and massacre as many of its civilian inhabitants as they can.
* TheSocialDarwinist: The villain believes only the strongest should survive and that everyone weaker is better off dead.
* SterilityPlague: Preventing enemies from reproducing. From there, time will take care of the rest of the finite enemy population. Arguably this is the most humane method of mass killing.
* VanHelsingHateCrimes: A [[HunterOfMonsters monster hunter]] wants to indiscriminately kill every single "[[OurMonstersAreDifferent monster]]", [[FantasticRacism regardless of how good or evil they really are]].
* WouldBeRudeToSayGenocide: The perpetrators of a genocide use dishonest or euphemistic terms, if not outright denying or excusing their atrocities.
[[/index]]
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