Tripwire Interactive announces the availability of a new free content pack for Killing Floor, their zombie shooter, as well as the release of a new PostMortem character pack as premium Killing Floor DLC. The free Incendiary content pack includes four new maps, a MAC-10 that fires incendiary rounds as a new Firebug weapon, a new money system, balance changes, as well as bug fixes. The PostMortem pack adds four new playable characters to the game's mix. In celebration, the game is for sale on Steam for 50% off, and a 50% discount also applies to the game's three character packs, including the new one.