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* Canonically happens quite a bit in the ''TabletopGame/{{BattleTech}}'' universe. The Kentares Massacre and the Word of Blake's Jihad are just two major infamous examples (the former historical, the latter rather more recent) that virtually ''anyone'' in the setting could immediately name.
* ''TabletopGame/DungeonsAndDragons'' examples:
** The ''Draconomicon'' states that even good dragons are prone to this. [[BullyingADragon Any disrespect]], even if it appears minor or an individual case, is magnified when made towards a dragon due to lesser mortals not knowing their place and their long life where they associate it with a long series of insults.
** There are also marids, genies of elemental water. Apparently, offending one in ''any'' way is a crime in their society if you aren't a marid. (And they barely tolerate being offended by other marids.) Of course, they're such incredible egotists that ''every'' one of them (that is not an exaggeration) has at least some title of nobility, if not royalty.
** In the ''TabletopGame/{{Ravenloft}}'' setting, the gothic PowersThatBe in control of the place ''love'' answering pleas for vengeance - but freely disregard the scale of the supposed wrong. A lot of the campaigns revolve around some greedy or prideful person successfully calling down a curse of undeath or torment on someone for an imagined slight or trivial grievance.
** The ''TabletopGames/ForgottenRealms'' campaign setting has this, combined with a SelfInflictedHell. Did you worship an evil god because it was the culturally accepted thing to do where you came from? Then you're going to that God's hell, even if you never really did anything evil or you never even ''knew of'' a good god you could worship. And it won't be pleasant ('cause none of the evil god have pleasant afterlives for their followers, making one wonder how they get followers at all. Worship me! And win eternal torment). Were you an atheist? Then once you die you get to spend a LONG time having your soul slowly destroyed, becoming part of a wall, gradually losing your memories and personality till there's nothing left.
** The Drow goddess, Kiaransalee, is the Goddess of Disproportionate Vengeance
** The [[DemonLordsAndArchdevils Demon prince]] Graz'zt is probably the least likely demon lord to rip you apart just for existing, even opening his layers of the abyss for trade. Mention that he actually fell in love with Iggwilv, that Malcanthet turned him down, or call his domain "The Little Hells", and he will feed you to the predatory plants in his gardens.
** One sample adventure "For Hate's sake" in the Heroes of Horror sourcebook is made of this trope. Growing up, Samuel (one of the primary villains of the adventure) was that guy who always held a grudge. Eventually he became a priest of the god of this trope himself. He then began taking revenge on all his childhood grudges (granted it's implied that MOST of these didn't involve murder). He eventually becomes complacent...so his god pulls a Poisonous Friend and summons a ghost to take revenge for him, and this time it ALWAYS involves murder. Samuel goes mad with guilt and ends up pleading with the ghost to stop, only to be (depending on their actions) killed by the [=PCs=], who the game master leads to believe is responsible (which given that his god is also playing this trope for Samuel becoming complacent, he is, in a way).
* This is why you do not steal the Relics of [[TabletopGame/MummyTheCurse the Arisen]]-neither they nor their gods take kindly to tomb robbers, so a [[SealedBadassInACan dormant]] one will likely be brought out of stasis, and he ''will'' find you. Fun Fact: The Empire of Irem didn't really have a concept of forgiveness, only revenge.
* PlayerCharacters in ''TabletopGame/{{Nobilis}}'' are bound by the Sevenfold Precept. Harming innocents is against the law, but if anyone harms you, you are allowed to repay it sevenfold. And (at least in Second Edition), Lord Entropy includes under the definition of "harm" accepting insults from a mortal, or simply accepting an order from one. Because it diminishes a Noble's miraculous nature.
** In ''TabletopGame/ChuubosMarvelousWishGrantingEngine'', Entropy's son, Entropy II, has set as one of the laws of his Evil World that none can be harmed more than three times as much as they deserve. (Why not "exactly as they deserve"? Because to Entropy II's mind, that can result in a rather nasty form of "you deserved that". Better to have a situation that evokes some sympathy.)
* ''TabletopGame/{{Exalted}}'':
** ''Aspect Book: Fire'' uses this trope to establish how bad the Realm's DeadlyDecadentCourt is. Peleps Dananchina, a noble of the Realm, responds to being called "stereotypical" by setting fire to the speaker's toys. And [[ViciousCycle the revenge taken]] for ''that'' is even ''more'' disproportionate.
-->'''Peleps Damanchina:''' ''(narrating)'' She didnít try to insult me again. She did try to assassinate me, but that was an entirely different matter.
** In ''Aspect Book: Air'', a monk of the Realm destroys an entire tavern because its logo violated Realm doctrine.
* This is part of the reason why the Dwarves in ''TabletopGame/{{Warhammer}} Fantasy'' are A: part of the "Gray" side of its BlackAndGrayMorality, and B: a dying race. They honor RevengeBeforeReason to the point they are TooDumbToLive, being willing to do things like get into a war that sees dozens of their own people dead and raze a castle that they spent years building to the ground because the guy who paid them was ''two and a half pennies short in his dozen wagonloads of gold payment''.
** The best example for the Dwarves, is the War of Vengance Or the War of the Beard by the Elves. It all started when the Dark Elf raiders disguised as High Elves attacked some Dwarf traders. The High King demanded compensation from the High Elves, but the arrogant Elf king Caledor II refused and had the dwarf ambassador's beard shaved, who declared an all out war on the High Elves. Shaving a Dwarves is considered so insulting the Dwarf is required to take the [[DeathSeeker Slayers oath]] and likely also kill you in the time between. The resulting war shattered the two Empires, and it ended with the Caledors death by High King Gotrek who took the Phoenix crown as compensation, and the High Elves were forced to withdraw from their colonies in the Old World to defend Ulthuan from the Dark Elves.
** Prince Sigvald once burned down an Imperial City. The reason? He didn't like the taste of their wine.
* ''TabletopGame/PsionicsTheNextStageInHumanEvolution''
** If you turn down a recruitment offer from The Shop, Escaton, Abraxis, Aleph, or The Red Orchestra, they will either kill you, forcibly abduct you, or ruin your life until you have no other choice but to change your mind.
** Harry's punishments in ''Broken Things'' are extremely harsh and are handed out for doing things like talking out of turn, requesting to be called by his name instead of subject number, and not answering questions quickly enough while under extreme duress.
** Rose is rude to her captors in the beginning of ''Captured''. They respond by [[spoiler: sedating her, shaving her head, taking away her piercings, and doing laser removal on her tattoos.]]
* [[TheEmpire The Imperium of Man]] in ''TabletopGame/{{Warhammer 40000}}'' uses this for ''everything''. A few examples:
** The Steel Cobras SpaceMarine chapter worshipped the Emperor as an animal totem. The penalty for following the Imperial state religion ''in the wrong way''? They were duly excommunicated, and any Imperial force to see a Steel Cobra is permitted, nay ''required'', to shoot on sight and leave asking questions to the Inquisition.
*** All this while every single Marine chapter worships the Emperor in a way not sanctioned by the Ecclesiarchy, and some are much weirder than the Steel Cobras without being censured. Even worse, Space Marines don't ''have'' to worship the Emperor (as the geneseed comes from the Emperor), they just have to be loyal to him, and some Chapters are rather open about it.
*** All this just shows that all it takes to accuse a Space Marine chapter of heresy is one dumb Inqusitor and some bad luck. Even First Founding chapters are not immune to this as Months of Shame show.
** The [[PsychoForHire Carcharodons]] [[http://wh40k.lexicanum.com/mediawiki/images/a/a6/SSharkIA10.jpg chapter of Space Marines]] are in love with this. After gaining control of the enemy's holdings (the [[MeaningfulName Tranquility]] system) at the end of the Badab War, they exterminated every single person who was not of recruitable age, and forced the rest to fight to the death to determine which of the tiny percentage of survivors would get to join their chapter. After that, they stripped the system of all useful resources and vanished.
** The [[KnightTemplar Black Templars]] Space Marines, upon learning that a few people on a planet had purchased alien equipment from traders, proceeded to massacre a significant chunk of the population. Even the ''Imperium'' usually limits the punishment for this to jail time.
** Subverted with Exterminatus. You'd think blasting the planet into an unusable wasteland is a bit much, but it's only supposed to be used if Chaos or Tyranid forces have overwhelmed a planet to a point where it isn't worth taking it back (Chaos corrupts everything and the 'nids eat everything and thus can lose billions and still have a net gain, so blowing up the surface of the planet will keep them from consuming anything usable) and yes, even the Imperium has its limits for throwing men into the meat grinder. Though given how utterly [[CrapsackWorld dystopian]] the setting is, someone, somewhere no doubt has used it for less than proper or sane reasons.
*** There is, in that a planet got exterminated because the taxes paid didn't round up and thus the Inquisition assumed they had started worshipping Chaos. Oooops...
*** There is an Inquisitorial Ordo whose job is to pass judgment on whether or not the Exterminatus committed was justified. Their approval rating is less than 10%. In more than 90% occasions the Exterminatus is declared a mistake and an Inquisitor who ordered it is stripped of his/her rank and executed.
** Imperial Guard Commissars are known particularly for their application of BLAM (fatal gunshot) in dealing with insubordination, heresy or uniform violation among hapless troops. This varies, but only the most suicidal of commissars ever engage in hapless murder of their own ranks. Bolt Shells cost to much to be wasted on a single Guardsmen who mis-tied his laces.
*** The Imperium has also been known to send entire regiments with a mandate to burn the planet if strictly necessary, because someone bought a Tau-made crop harvester.
*** Of course that's partially justified since if that crop harvester had been bought from certain other illegal sources it would cause anyone who took a bite of the crops to turn to Chaos, mutate, or get stricken with a particularly virulent Nurgle disease. If someone gets away with purchasing from the Tau they'll keep buying from other xenos until they get a Chaos artifact in a shipment.
*** See the above about flip-flopping. The Imperium has ''also'' been known to tolerate - or at least turn a blind eye to - limited trading with the Tau Empire provided it's kept low-key. So...DependingOnTheWriter.
*** Less DependingOnTheWriter and more Depending on the Inquisitor. The Inquisition is a vast organization, and they vary pretty wildly in what they'll tolerate. Some, such as Gideon Ravenor of Dan Abnett's Ravenor Trilogy, will flat out ignore some xenos if they have better things to do; others will torture you on vague suspicions (most of them are in the fluff, as they don't tend to make relatable protagonists, or good inquisitors for that matter).
** Any member of the Inquisition can and will dispense these at a moment's notice depending on their mood, temperment, boredom, paranoia, or a combination of both. Inquisitor Lord Karamazov famously roasted a young preacher. His crime? Thorian inquisitors, Karamazov's ''peers'', thought the preacher might have been the Emperor reincarnated. The boy had otherwise done nothing wrong.
*** Karamazov usually roasts people for far less. In his court, everyone found guilty is sentenced to death. Everyone found innocent is sentenced to death too because they wasted his time by appearing guilty while having done nothing wrong.
** Woe befall anyone who crosses the Dark Angel's path. Their Interrogator-Chaplains extract confessions from suspected Fallen Angels with brutal torture. If you deny you are one, they will call you a liar then continue to torture you until you do confess, or kill you if they think it's pointless. If you confess you are one (even falsely) they will accept the apology, ''then kill you''.
** [[ImageBoard /tg/]] created the Necron Lord Assholetep, "An aeons old automaton king... with the petulant impatience and obnoxious tantrums of a 7 year old child." Anecdotes regarding Assholetep state that he will obliterate entire sectors over comically trivial slights.
* The Europans' general schtick in ''TabletopGame/RocketAge''. They bombed Io back into the stone age (they consider this merciful), engaged in a genocidal war with the Jovians when they began using space flight, driving them into hiding, as well as constantly threatening Earth with disintegration.
* A DM in an especially pissy mood can sometimes do this. Say something not nice about the DM's girlfriend? [[RocksFallEveryoneDies OOP! Your character just burst into flames!]]
* ''TabletopGame/{{The Splinter}}'' has this as a possible character origin. Were you caught in possession of books or associating with certain groups? You might get sent to play the game, which is an almost certain death sentence.