DescriptionKilling Floor is a Coop Horror Survival Game developed by Tripwire Interactive only available for the PC, you can buy off of steam for $20.
DetailsKilling Floor puts you and 6 other people (or you can go solo) against wave after wave of failed military experiments called "Specimens." There are specimens that puke, grapple you, cloak, scream, weld giant knives, shoot fireballs, hop, weld chainsaws, some that go insane and try to pound you with their 100 pound blenders, and a endgame boss with a Rocket Launcher/Minigun for an arm and refers to all of the specimen as his children . You have a variety of about 20 weapons, 7 Perks (Field Medic, Sharpshooter, Support Specialist, Commando, Bezerker, Firebug, and Demolitions) with a 6 level cap, 8 official Tripwire maps, loads of in-game mods called "Mutators," 5 different difficulties: Beginner, Normal, Skilled (only accessible through the console), Hard, and Suicidal, 300+ community maps, and a kick-ass metal soundtrack (if you're into that sort of thing). It also has hilarious British voices :D!
Forum LinkTripwire Interactive Killing Floor ForumsScreenshots

VideosRelease Trailer09' Summer Update TrailerGameplay pt.1Gameplay pt.2Add-on SillinessSo, You Want to Buy It?No Problem, it costs $20 with a credit card on steam
Purchase PageDLC1 Page ($2)DLC2 Page ($2)