With the Christmas holiday closing in, Tripwire Interactive are offering Killing Floor free to play to everyone for a long weekend, starting on Thursday 8 December 2011 and running through to Sunday 11 December. This will give everyone who has not yet played the game a chance to try it out completely free! And there is a little surprise lurking as well... check out the Mystery Images on the Killing Floor Official Game Group on Steam for clues: http://steamproxy.com/games/KillingFloor

Killing Floor is available now on Steam (http://steamproxy.com/steamstore/app/1250/ ), Direct 2 Drive and other digital outlets, as well as in stores across the world.