We have the first five screenshots from Killing Floor, a first-person co-op survival horror, set in and around London after a mad scientist's "specimens" have broken loose and gone on the rampage. Killing Floor includes a co-op game mode for up to six players obliterating multiple waves of specimens, a solo game mode for offline play, 9 different monster types, a persistent Perks system, full support for Steamworks features, and more. Killing Floor was developed by Tripwire Interactive.