Killing Floor is co-op survival horror game. Up to 6 players in online co-op mode, or just you, on your own, playing the Solo mode. The aim – cleanse each area of zombies, in waves, until you get to the last one. The Big One. The Patriarch. Then exterminate him, too. Actually, they aren’t “zombies”. They are the left-over “specimens” from a cheap and dirty government program to clone soldier-monsters. The basic ones will just munch on your arm and try to disembowel you. The bigger ones were the first ones they tried arming. Nothing much. Just a chainsaw or a blade for starters. They had just got on to the chain gun and rockets when the government tried to secretly shut down their secret program.

But, in the typical way these things go, the program didn’t want to be shut down. The specimens got loose. No-one was left alive to turn off the specimen-cloning equipment. And now they are running amok. Well, some of them are running amok. Others are shambling amok or even jumping amok, but you get the idea.

The police were sent in, but that wasn’t even a challenge for the specimens. The first army units hadn’t been warned what to expect. The screams of “its got a bloody chainsaw!” over the radios probably didn’t do much for morale, as whole units were chewed up. Quite literally, in some cases, of course.

Killing Floor has sold more than 1 million copies on PC - and is still selling strongly! This is a major achievement from any game studio as few games, even multi-million-dollar AAA titles, ever sell over 1 million copies on PC. As a truly independent outfit who have funded ourselves all the way, we are particularly proud of the achievement. Our thanks go to all the developers of the Killing Floor mod and everyone on the team here at Tripwire Interactive, who's continued support has made the game such a huge success.  We would also like to thank all the members of the community who have made maps and other add-ons for the game, with the Killing Floor SDK. And, most importantly, we offer our thanks to all of the fans and everyone who has bought the game over the past two years and helped make Killing Floor the cultural phenomenon that it is today. 

As everyone loves stats, here are some of the important ones:

• 1.1 MILLION copies of Killing Floor sold on PC in 2 and a half years
• Nearly 2 million Killing Floor DLC packs sold
• 45 MILLION hours of Killing Floor played to date
• 440 MILLION Zeds have been dispatched in Achievements alone - including more than a quarter-million Christmas Santa
• Zeds are being killed by you at the rate of over 20,000 an hour!
• Hundreds of custom maps have been created by the community

For the next few days Tripwire is practically giving the game away with a massive discount of 85% as the "Midweek Madness" feature on Steam this week. That is the cheapest they've ever sold the game for. If you have friends who don't yet play the game, now is the time to educate them on the joys of Killing Floor. You all go on playing the games we make for PC and we'll go on making and supporting them!

Key features:

• Co-op game mode for up to six players obliterating multiple waves of specimens
• Solo game mode for offline play
• Watch those crucial and violent creature deaths in slomo “ZEDtime”, even in multiplayer
• 9 different monster types trying to eat your face off, armed with everything from teeth and claws, through to chainsaws, chainguns and rocket-launchers
• 12+ weapons for the players to chose from, ranging from knives and fire-axes up to pump shotguns, rifles and a flamethrower
• Add in a welder, medical tools and body armor to help the players survive
• Persistent Perks system, allowing players to convert their in-game achievements into permanent improvements to their character’s skills and abilities
• Players choose which Perks to play with, so they can best balance out a co-op team to survive the horrors
• Open, non-linear play areas: choose when and where to fight – or run; weld doors closed to try and direct the monster horde
• Full support for Steamworks features, including Steam Achievements and Friends
• Fully-configurable, allowing players to change things as simple as the difficulty level or number of creature waves, or go so far as to set up their own favorite waves of monsters
• Includes SDK for the creation of new levels and mods

Killing Floor is currently available for digital download through Steam for $19.99.