

Regular waves of specimen will pit players against group combinations consist of nine different specimen type, allowing them to cause complicated attacks until last one of them killed and Trader opens her doors. Along the game session, squad will face different specimen in waves with trader time in between.

There are ten different specimens, each with different abilities and appearances. Unlike zombies, they can be aggrevated by damage, sightline or gun noises and have instincts kick in to protect each other for not breaking the attack composition. It is not necessarily wrong to label them as zombies, however, as they behave in such a fashion. While they are widely referred to as zombies they are in fact failed experimental clones created by Horzine Biotech, a biotechnology company in London, England.

Specimens are the main antagonists of Killing Floor.
