The "Urban Nightmare" Character Pack adds 4 more new and unique playable characters for Killing Floor as Downloadable Content. Once you have bought the pack, they will become selectable in the character selection screen in-game.

Key features:

Dave ‘The Butcher’ Roberts, started his professional life as a city banker, working in the cutthroat world of finance, but pretty soon the high-flying champagne lifestyle began to grate on a man eager for more physical challenges. So Dave quit his day job and became an enforcer in London’s shadowy underworld. As you do. Using his size and personality to bully his way up the criminal ladder, Dave quickly found work in London’s biggest crime family as their primary heavy muscle.

Dave’s been given a new mission by his boss, one that’ll hopefully be good for business: clean the Horzine filth off the streets. It’s one he’s taking very seriously.

Doctor Jeffrey Tamm dedicated his youth to the pursuit of two things, computer science and Brenda Rank, his college crush. After the restraining order was slapped in place by an unsympathetic High Court Judge, he threw himself into his only remaining outlet, robotics. Jeff’s passion and fervor soon earned him a top job with Horzine, who needed someone to head up the development of their Domestic Assistant Robot (DAR). No one knows Jeff’s true goal, the desire that keeps him up all night tinkering with all sorts of bleeding-edge technology… Jeff still hungers for Brenda Rank and if he can’t have her, he’ll make her. Literally.

Brave, talented and handsome, on the surface Samuel Avalon’s the ideal fireman, even making it into last year’s Local Hunk Heroes calendar, his toned biceps tensed photogenically as he cradled an artfully smudged baby.

But Sam harbors a dark secret… he loves death, revels in pain and is drawn to destruction; being a fireman doesn’t only pay the bills, it sates dark urges. When the Horzine outbreaks began, Sam was among the first to grab a weapon and plunge into the fire and fury raging on the streets of London, eager to feed his disturbing appetites in the name of heroism.

After having his stomach stapled three years ago and losing over half his bodyweight in fat, Rob Allan realized the world was his oyster, so he did what any reasonable person would do… became Shadow Ferret, ninja protector of Brixton.

After several awkward trips to the hospital, two short stints in prison, and an embarrassing You Tube video which got over four million hits, Rob was starting to wonder if he was cut out for the whole stealthy martial arts thing. Then his prayers were answered. When evil erupted from Horzine’s corporate bowels Rob saw the chance for Shadow Ferret to hone his abilities and show the world he’s worthy of respect.