We're still 23 days away from Christmas but Killing Floor's Twisted Christmas event is already underway on Steam. Thrill Chill 2014 adds a new map and the ability for server owners to turn on the special holiday themed zombies on whenever they feel like it.
New Christmas Map - The Thrills and Chills Amusement Park
• Set in a quaint Alpine village The Thrills and Chills Amusement Park will leave you screaming for more! Take a trip on the Fireball ride, admire the world class Christmas Tree and be sure to visit Santa's Workshop and the Petting Zoo for extra surprises!

All Holiday Zeds Can Be Turned On
• Servers (and clients acting as servers) can change a line in their KillingFloor.ini file to change what special event zeds will be in their game
• In the Killingfloor.ini, section [KFmod.KFGameType] find the line (or if it is missing admins can add it): SpecialEventType=
Valid inputs for this field are:
• ET_None - Standard Specimens
• ET_SummerSideshow - Summer Specimens
• ET_HillbillyHorror - Halloween Specimens
• ET_TwistedChristmas - Christmas Specimens

General
• All event achievements have been turned on permanently



Finally, Tripwire is giving away 100 Killing Floor DLC pack Steam codes for any fan that emails them a video of them and their friends playing the new map. Simply record some footage and send a mail to this special email.