Tripwire Interactive announces plans to self-publish the North American retail edition of Killing Floor, their survival/horror shooter that's already available via Steam. Here's the dealio:

Roswell, GA, 18 August 2009: Tripwire Interactive is delighted to announce that we will now be self-publishing, starting with the retail version of our own Steam hit zombie co-op shooter – Killing Floor. Tripwire will be the publisher for Killing Floor in North American stores, with the boxes due for shipping to retail outlets in USA and Canada shortly. As always with Tripwire titles, the retail version will be fully supported going forward with additional free updates for the game. MSRP will be $19.99 in the USA.

About the game
Killing Floor is a Co-op Survival Horror FPS taking place in the devastated cities and countryside of England, after a series of cloning experiments for the military goes horribly wrong. You and your friends are members of the military and police, dropped into these locations with a simple mission: survive long enough to cleanse the area of the failed experiments. The only problem is, these “experiments” aren’t waiting to be taken out – they’re coming for YOU!