Killing Floor
Trivia
Easter Eggs
Members of the Killing Floor development team mapped and provided their faces for the human characters: Private Schneider, Captain Wiggins and Lieutenant Masterson (contributed respectively by Christian Schneider, Alan Wilson, and Mike Munk).
German version
There are a number of changes in the German version: * Killed enemies disappear instantly * Zombies still bleed when shot, but there are no blood textures applied to the environment. * The gore effects when killing a Bloat were toned down. * There are no cut off limbs.
A detailed list of changes can be seen on schnittberichte.com (German).
Potato Sack Pack
For April Fools' Day in 2011, money piles became a potato, and the characters' bios were altered to be rather unprofessional, and were barely biographic at all. The reason for the potato is because it was part of the Potato Sack Pack on Steam, and every game in it had something turned into a potato.
Trivia contributed by Nelson340, Arejarn, Patrick Bregger.