Killing Floor is co-op survival horror game. Up to 6 players in online co-op mode, or just you, on your own, playing the Solo mode. The aim – cleanse each area of zombies, in waves, until you get to the last one. The Big One. The Patriarch. Then exterminate him, too. Actually, they aren’t “zombies”. They are the left-over “specimens” from a cheap and dirty government program to clone soldier-monsters. The basic ones will just munch on your arm and try to disembowel you. The bigger ones were the first ones they tried arming. Nothing much. Just a chainsaw or a blade for starters. They had just got on to the chain gun and rockets when the government tried to secretly shut down their secret program.

But, in the typical way these things go, the program didn’t want to be shut down. The specimens got loose. No-one was left alive to turn off the specimen-cloning equipment. And now they are running amok. Well, some of them are running amok. Others are shambling amok or even jumping amok, but you get the idea.

The police were sent in, but that wasn’t even a challenge for the specimens. The first army units hadn’t been warned what to expect. The screams of “its got a bloody chainsaw!” over the radios probably didn’t do much for morale, as whole units were chewed up. Quite literally, in some cases, of course.

The holiday event of the season is back with the Killing Floor Twisted Christmas 2 event, starting tomorrow, 7 December and running through 4 January. 

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. And, just so everyone can try it out, the whole lot is free to play this weekend (8 Dec - 11 Dec)!

Here's the details on the new weapons:

• The Sharpshooter gets a shiny .44 Magnum revolver - good for dual-wielding for even more stopping power.
• The Commando picks up a US Army surplus M-4 Carbine, with a nice, new red dot sight fitted.
• For Demolitions, we've removed the sight and added the under-slung M-203 single shot grenade launcher. Wonderful all-purpose weapon!
• Support Specialists can get their hands on a semi-automatic combat shotgun.
• Berserkers can go all Scottish, with a massive two-handed Claymore. Perfect for the holiday season...
• Following on from Horzine's earlier experiments with healing darts, they have now provided the Medic with an MP5 machine pistol, mounting a dart-firing device.
• Ripped from the arm of a dead Husk the Firebug gets his asbestos-covered hands on the fireball launching Huskgun!!! Charge this baby up and watch the zeds explode in a ball of flames!

The new weapons, new map and the whole Twisted Christmas event will be available with the upcoming Free Weekend for the game, which starts this Wednesday - 7th December. Bring friends - you know you want to! Baddest Santa is only unlockable during the Twisted Christmas event - so don't miss out!

Key features:

• Co-op game mode for up to six players obliterating multiple waves of specimens
• Solo game mode for offline play
• Watch those crucial and violent creature deaths in slomo “ZEDtime”, even in multiplayer
• 9 different monster types trying to eat your face off, armed with everything from teeth and claws, through to chainsaws, chainguns and rocket-launchers
• 12+ weapons for the players to chose from, ranging from knives and fire-axes up to pump shotguns, rifles and a flamethrower
• Add in a welder, medical tools and body armor to help the players survive
• Persistent Perks system, allowing players to convert their in-game achievements into permanent improvements to their character’s skills and abilities
• Players choose which Perks to play with, so they can best balance out a co-op team to survive the horrors
• Open, non-linear play areas: choose when and where to fight – or run; weld doors closed to try and direct the monster horde
• Full support for Steamworks features, including Steam Achievements and Friends
• Fully-configurable, allowing players to change things as simple as the difficulty level or number of creature waves, or go so far as to set up their own favorite waves of monsters
• Includes SDK for the creation of new levels and mods

Killing Floor is currently available for digital download through Steam for $19.99.