The killer PC game where you and your friends face off against hordes of undead is getting some new characters in a free DLC pack. The Killing Floor has just unveiled a brand new DLC pack loaded with fire. The "Incindiary Content Pack" offers a few new burning details before its free download goes active on Steam. All users that already own The Killing Floor will receive The Incindiary Content Pack automatically. Those who don't own the game yet - get on it. This stuff is killer.