Tripwire Interactive announces a Twisted Xmas Event for The Killing Floor, beginning with the free weekend beginning tomorrow for their survival/horror shooter and running through January 4. Here's the deal:

The event features an all new level, Ice Cave, as well as brand new Twisted Christmas music to get you in the holiday spirit. But wait - there's more! Santa is bringing even more gifts - the Winter Weapon Pack, with seven brand new weapons complete with new achievements, free to everyone who owns the game. Returning from last year's event we have Christmas themed specimens replacing all of the regular baddies, Santa’s Evil Lair, Christmas themed achievements and the chance for those who missed unlocking the special Baddest Santa character last year to grab him this time around. On top of all that, another character pack DLC - Steampunk 2, bringing you the rest of the Steampunk-styled characters to complete the set.