Perpetuating video games' colourful image of London, up to six players are trapped in the hellish city after a mad scientist's twisted experiments escape and wreak havoc.

To fend off the relentless waves of nasties, players have a sizeable arsenal--with flamethrower--and can weld doors shut to delay the fiends. Throw in an SDK, persistent character perks and Steamworks integration, and your monster mash is complete.

Killing Floor is to be released on PC for download through Steam "in the near future." If you want to check out its source material, the original mod is available on FileShack.