History VideoGame / KillingFloor

* HoistByHisOwnPetard: The Demolitions perk grants resistance to explosives in general, meaning that a high-level, armored Demolitions expert can survive a near-miss from a Patriarch rocket. However, when that same rocket sympathetically detonates all the pipebombs the Demolitions expert has carefully laid out to kill the Patriarch... not so much.

A cooperative online ZombieApocalypse FirstPersonShooter for PC developed by Creator/TripwireInteractive on the VideoGame/{{Unreal}} [[UsefulNotes/GameEngine Engine 2]]. Originally a mod for ''VideoGame/UnrealTournament2004'', in 2009 an official retail version was released. While generally an updated version of the mod, there are changes - notably the "perk" system, a series of seven different "classes" that players can choose.

* CoolGuns: A large selection of such, ranging from the classic tommy gun to an overkill autoshotgun.

* OurClonesAreDifferent: The Clots are failed clones of the dead son of the man who invented the process under contract by the UK government for SuperSoldier research. They're grown through a combination of a biomechanical "Mother Clot," which both renders down bodies into a mass of cells and then "builds" a new body out of them, and a transgenic virus that over-writes their DNA with that of the dead man's. However, being BornAsAnAdult [[NurtureOverNature without a corresponding lifetime of experience and socialization]] (and perhaps some undiagnosed mental sickness or another that he was genetically pre-disposed to) results in a person with the mentality of an angry gorilla and the body of a fully-grown man in the prime of his life. Since they still have the virus in their bodies, clots are essentially {{Plague Zombie}}s as well.

A top-down shooter spinoff of the game titled ''Killing Floor: Calamity'' was released on the UsefulNotes/{{Ouya}} on December 18th, 2013, with an Android port following after. On May 8th 2014, Magazine/PCGamer announced [[http://www.pcgamer.com/2014/05/08/killing-floor-2-exclusive-first-look-co-op-fps-horror-with-the-most-advanced-gore-system-ever/2/ a sequel]], ''VideoGame/KillingFloor2'', is in the works. An Early Access build of the sequel was made available on April 21, 2015, with a full release following on November 18, 2016. A third game was also announced in 2023.

* ArtificialBrilliance: Specimens will actively move to avoid hand grenades. Husks aim their shots to impact the ground near their target, similar to a human player with a rocket launcher. And, in an example verging on ArtificialStupidity, specimens will sometimes jump for the hell of it, just to throw off a player's aim. And speaking of behavior that's situationally stupid, most of the specimens seem to avoid approaching players in a straight line if they're already part of a large group so they can flank better.

* AscendedMeme: One of the Circus Scrake's lines is "And not a single fuck was given that day".

** Going GunsAkimbo often has this effect. You get double the fire rate and ammo capacity over using one gun at a time, which makes them [[Film/{{Aliens}} handy for close encounters]], but you sacrifice the precision of being able to look down the ironsights, meaning mid- to long-range combat will be much more difficult.

*** The [=M7A3=] and Schneidzekk also can venture into this territory. The former has damage similar to the [=MP5M=] while being fifty percent more expensive, and lacks the power to really go toe-to-toe with heavier-grade Zeds. It also has absolutely absurd recoil, making it difficult to hit anything on full-auto when waves get hairy. The Schneidzekk, on the other hand, has great damage, but a fire rate that borders on unbelievable and regular iron sights that block half the view when aiming and are hard to see in the dark, compared to the other weapons' more open red-dot sights. It also goes for a hefty price even when well-leveled.

** The M99 AMR, in the hands of a high-leveled sharpshooter, can one-shot most enemies - including Fleshpounds! - at almost any difficulty level and go through a line of specimens like a hot knife. The downsides? It costs ''£6250'' to fill up - but only holds 24 shots in reserve - making each shot cost £250. It's also a single-shot rifle with a reload time of ''at least'' 1.75 seconds, but the worst part is that it weighs 13 blocks - meaning that the only weapons you can carry alongside it is your starting pistol, knife and grenades (taking up a block in itself), and either a machete (a step up from the knife) or a pipebomb, neither useful for a sharpshooter. It's only useful against the Patriarch - money serves no purpose after the next-to-final wave, and the only other specimens that spawn in the boss wave are low-tier things that a capable sharpshooter can easily take care of with their 9mm.

* PowerupLetdown: The new Combat Shotgun, which costs 5 times as much as the regular Shotgun, shoots faster and has a pretty [[GunAccessories reflex sight]]. The tradeoff? Well... it reloads 35% slower than the regular, holds 2 shells less, does the same damage per shell, has the same maximum amount of shells, and its ammo is also more expensive.

* RagtagBunchOfMisfits: The player characters include, among others, a day trader and his girlfriend, a football hooligan, a raver, a failed mall Santa, and an obnoxious wealthy guy based on Harry Enfield's "Loadsamoney" sketch character.

* RecoilBoost: The low gravity of the Moonbase map allows for weapons with enough recoil, primarily shotguns, to throw players about if they fire them in the air. Extremely useful for quick escapes, as no Specimens can match the speed you gain in this manner.

* RevolversAreJustBetter: Twisted Christmas 2 brings a .44 Magnum revolver for the Sharpshooter. The Weapon Community Pack DLC adds the Flare Revolver for Firebugs. [[GunsAkimbo Like the other pistols, they can be dual-wielded.]]
* ReviveKillsZombie: The Combat Medic's grenades release healing gas that can also harm the specimens.

** The number of total women is increased to seven when including the Stalker and Siren Specimens. The Crawler's gender is dubious -- it's reskinned as a female Siamese Twin during the Summer Event, but during the Hillbilly Halloween and Twisted Christmas event, it's a male hillbilly with a severed torso and a male reindeer, respectively. The same thing applies to the Bloat, who is reskinned as a big fat woman during the Hillbilly Halloween, but has male variations in other events.

* SniperPistol: The first shot is pinpoint accurate for most weapons, notably with the handguns. Even when dual wielding! That said, you get no crosshair, and bringing up the iron sights with the right mouse button reduces your walking speed. In the hands of a sharpshooter, though, it's absolutely lethal. On lower difficulty levels, it's a perfectly usable weapon even late in the game, allowing skilled players to rack up headshot after headshot.

** The Flesh Pound literally turns red when he enters attack mode, and the Patriarch has a red shimmer when entering his invisible fleeing/attacking mode.

** The Lever Action Rifle (commonly abbreviated as the LAR). While slow-firing, it has decent power and it's the cheapest any-perk weapon in the game at £200, making it a good early-game sidearm. Unlike many of the other firearms in the game, it is loaded one round at a time, meaning a player can cancel reloading the full amount if they realize the sudden need to switch to a different weapon or run for their lives. Additionally, its headshot bonus is double the regular damage (moreso if you happen to be a Sharpshooter), compared to most other guns' 10% bonus, and as the rounds drag on, headshots are the ''only'' way to go.

** The Compound Crossbow seems out of place in a game full of high-end military hardware. But in the hands of a capable Sharpshooter (or pretty much any other experienced player regardless of their perk) it can tear the heads off of most Zeds with only one shot (the Fleshpound and Patriarch being the exceptions). It comes equipped with a scope (one of few weapons that do), and not only that, bolts can penetrate and kill multiple smaller Zeds with a single shot. Additionally, a maxed-out Sharpshooter will always spawn with this weapon. It has undergone several whacks with the {{Nerf}} bat, but since most of those have focused on its ''cost'' it still remains a strong weapon for those who can consistently shoot Zeds in the head.

A top-down shooter spinoff of the game titled ''Killing Floor: Calamity'' was released on the UsefulNotes/{{Ouya}} on December 18th, 2013, with an Android port following after. On May 8th 2014, Magazine/PCGamer announced [[http://www.pcgamer.com/2014/05/08/killing-floor-2-exclusive-first-look-co-op-fps-horror-with-the-most-advanced-gore-system-ever/2/ a sequel]], ''VideoGame/KillingFloor2'', is in the works. An Early Access build of the sequel was made available on April 21, 2015, with a full release following on November 18, 2016.

* CameraScrew: When the Patriach first spawns there are about five seconds during which you are forced into a third-person view of him as he stands up and gets ready to fight. If he spawns near you, [[GameBreakingBug the camera continues viewing the Patriarch]], during which you can't see well enough to do anything while he can do [[GatlingGood whatever]] [[CombatTentacles the hell]] [[StuffBlowingUp he wants]] to you.

* InvisibleWall: Often to keep you out of Specimen spawn points, but most of the official maps don't have too many. They instead tend to feature gravity barriers, in the form of ramps that the Specimens use to enter the area, but which the players are [[incapable of climbing over.

** The M99 AMR, in the hands of a high-leveled sharpshooter, can one-shot most enemies - including Fleshpounds! - at almost any difficulty level and go through a line of specimens like a hot knife. The downsides? It costs ''£6250'' to fill up - but only holds 30 shots in reserve - making each shot cost £250. It's also a single-shot rifle with a reload time of ''at least'' 1.75 seconds, but the worst part is that it weighs 13 blocks - meaning that the only weapons you can carry alongside it is your starting pistol, knife and grenades (taking up a block in itself), and either a machete (a step up from the knife) or a pipebomb, neither useful for a sharpshooter. It's only useful against the Patriarch - money serves no purpose after the next-to-final wave, and the only other specimens that spawn in the boss wave are low-tier things that a capable sharpshooter can easily take care of with their 9mm.

* BreakOutTheMuseumPiece: The Halloween 2012 event adds a bunch of UsefulNotes/WorldWarI and UsefulNotes/WorldWarII-era weapons, including an MKb42, M1A1 Thompson, and M1897 Trench Gun [[IncendiaryExponent loaded with incendiary buckshot]]. Owning the stand-alone ''VideoGame/RedOrchestra 2'' expansion ''Rising Storm'' gives access to another Thompson with the famous drum magazine, and the Steampunk weapon pack includes dressed up versions of yet another Thompson and a scoped Lee-Enfield.

* MacheteMayhem: One of the Berserkers weapons, it's a step up above the knife only takes up 1 block of weight and can be found around any map.

* AscendedFanfic: Numerous well-made custom maps and at least one pack of custom weapons have been officially added to the game through patches.

You and up to five friends take the roles of a squad of [[RagtagBunchOfMisfits a bunch of surviving military, police personnel, street thugs,]] [[VideoGame/TeamFortress2 the Pyro]], [[RagtagBunchOfMisfits a Queen's Guard, and more]] sent into various areas to wipe out the [[NotUsingTheZWord Specimens]] of a FreakLabAccident GoneHorriblyWrong. Games are divided into several rounds, in which players must kill a required number of specimens. Between rounds, the players have a minute (or ninety seconds on Beginner difficulty) to visit the Trader, a woman who sells you weapons, armor, and ammo. After all the set rounds are completed, one last round against the [[FinalBoss Patriarch]], the creator of all the specimens, who has become a genetic monstrosity himself, happens. [[ExcusePlot The game's story is not exactly a masterpiece]], but it has [[KillEmAll an obvious goal]].

* AnAxeToGrind: One of the melee weapons is a fireaxe. Following the Twisted Christmas Event, completing an achievement in another game unlocks a dwarven battle axe.

* TheBerserker: [[ExactlyWhatItSaysOnTheTin The Berserker perk]]. With his brisk movement speed, absurdly thick skin and mighty swinging arm, he specializes in closing in on the Specimens and fighting at spitting distance, first with the humble knife or [[MacheteMayhem machete.]] Later, with some more dosh, he can keep up his nimble ways of dancing in and out of enemy range with renewed strength thanks to the [[AnAxeToGrind fire axe]], [[KatanasAreJustBetter katana]], or [[CoolSword claymore]], or become the world's most painful doorstop with a bloody awesome [[ChainsawGood chainsaw]].

* BreakOutTheMuseumPiece: The Halloween 2012 event adds a bunch of UsefulNotes/WorldWarI and UsefulNotes/WorldWarII-era weapons, including an [[RareGuns MKb42]], [[CoolGuns/SubmachineGuns M1A1 Thompson]], and [[CoolGuns/{{Shotguns}} M1897 Trench Gun]] [[IncendiaryExponent loaded with incendiary buckshot]]. Owning the stand-alone ''VideoGame/RedOrchestra 2'' expansion ''Rising Storm'' gives access to another Thompson with the famous drum magazine, and the Steampunk weapon pack includes dressed up versions of yet another Thompson and a [[CoolGuns/{{Rifles}} scoped Lee-Enfield]].

* RareGuns: One of the assault rifles available is a German [=MKb42=], the prototype of the [[http://en.wikipedia.org/wiki/Stg_44 StG-44]], the first assault rifle ever mass-produced. It's a surprisingly good weapon (more powerful and precise than the [=AK47=] and the M4).

* HalfTheManHeUsedToBe: The Hillbilly Crawler has nothing below the waist but its dangling spine.

* JackOfAllStats: The Commando has elements of this. [[UnorthodoxReload He reloads any gun faster,]] [[StatOVision can see enemy health]] [[SpiderSense and cloaked stalkers,]] and can chain [[BulletTime Zed Time]] extensions. He uses the general-purpose [[MoreDakka assault rifles]] and tears though the swarming smaller Specimens. [[MasterOfNone He lacks heavy punch]] though, and is less effective than TheBerserker, [[StuffBlowingUp Demolitions]] or [[ShotgunsAreJustBetter Support]] at taking out heavy Zeds. After enough practice as other Perks, and in higher difficulties, some players ignore the class entirely, as chaining Zed times can also be done by TheBerserker, a decent Sharpshooter can pick targets off better with fewer shots, and being able to see Specimens' health becomes a negligible ability when the Commando's best weapons merely chip away at their health.