October 22, 2009, 2:03 pm - Valve - General Announcement
Play the full game for FREE including the just released 'Level Up' Content Pack that contains 3 New Maps, 7 New Weapons, 20+ New Steam Achievements. Also released today is the new Nightfall Character Pack DLC that contains 4 more new and unique playable characters.
In celebration of the update, Killing Floor is on sale for 25% off until Monday.
Join in on the Free Weekend fun and play now! Must have Steam installed.