Few games enjoy the longevity of Killing Floor. Released in 2009, Tripwire Interactive's "co-op survival horror" enjoys relevancy in no small part due to Developer support. Killing Floor enjoys updates and events throughout the year, and the spookiest holiday can't be forgotten. For the second year running, KF is unleashing the Hillbilly ZEDs on your British Special Forces until November 3rd. The Redneck-themed mutants/clones are far wackier than your standard bunch of zombies; but this particular horror is a double feature.

Put on your party hats and fire wildly into a crowd of shambling horrors, preferably in slow motion. Killing Floor has just celebrated its fifth year since release, and Tripwire Interactive has scoured their databases to give us some stats on their zombie-slaughtering co-op survival horror. And really, who doesn't love huge info ...

The ever-so seasonally conscious folks down at Tripwire have flipped the switch for their own Killing Floor Halloween event, Hillbilly Horror Fright Yard, active until November 7th. It's only natural that a horror game celebrating the summer solstice and Christmas should also feature a Halloween-themed update for the spookiest holiday. Grab your weapon of choice, five buddies, all the dosh you can carry, and jump into a redneck zombie-infested train yard for some super British survival horror. 

Killing Floor's annual Summer Side Show is in full effect.The FPS zombie thrasher has been well supported by developer Tripwire Interactive for years, and this summer is no different. The free to play event actually started up last Wednesday, but most of the Co-Optimus crew was knee deep in pre-July 4th frivolity by the time we got the news. Exploding skies and what not. We've got some killer new screens and a juicy new video with all the details.  

Killing Floor is a popular, low-cost alternative to the Left 4 Dead series. Its 6 player online co-op and addictive character leveling system more than compensates for the absolutely haphazard character and monster design. The Steam game goes on sale constantly, which has helped it reach its millionth sale recently. And what better way to celebrate than another big sale?

Oh, sweet!  Killing Floor is free to play this weekend!  For those of you who don't know, Killing Floor is a PC horror themed FPS that offers online co-op for up to six players.  We reviewed it way back in 2009, and we really enjoyed the title, giving it a 4.5/5.  Not only is the game free to play, there's also a "Twisted Christmas" event going on.  That's right, you can blast mutant reindeer and gruesome gingerbread men into tiny little bite-sized pieces.  The "Twisted Christmas" event also includes new weapons, new achievements, and a new map.  All of the details are right here.  Check out the following video for more information.

Killing Floor, the six player co-op shooter on PC, is kicking off a brand new promotion for the summer called "The Summer Sideshow Event."    Evil monkey men?  Check.  Psychotic undead clown dudes?  Check.  Creepy guys wearing gas masks?  Check.  Hiding under the covers for the rest of the night?  You betcha.

It's that time of year... when you're getting pretty sick of all the holiday cheer.  Why not take out your frustrations on the whole "glad tidings" bit with some good old fashioned zombie killing?  Killing Floor is bringing its players the "Twisted Christmas" event, starting December 14 and running through January 4.  All of the normal zombies and other enemies will be replaced by holiday themed specimens, and there's even a brand new level: Santa's Evil Lair.  (I suppose we all knew deep down inside that those elves were a bit diabolical.)  If that isn't enough for you, there are new achievements, including 13 Christmas themed ones, taking the total up over 130!

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.

Now that uber game service Steam is available for Macs, more and more titles are being released for Apple's long neglected (by game companies, at least) platform.  One new addition is Killing Floor, a strong co-op zombie slaying title.  We thought rather highly of the title, and it's on sale for 33% off the standard $20 price.  Best of all, cross-platform play is enabled, meaning you can slaughter hordes of undead with a friend regardless of their preference for a computer.

The incredible Steam deals continue, and for the next 16 hours you can snag Killing Floor for only $5!  

We were pretty surprised at how fun Killing Floor was when it was released earlier this year with its 6 player co-op gameplay.  At first we thought it was nothing more than a Left 4 Dead clone, but we soon came to realize the game did quite a bit to set itself apart.