Killing Floor 2 is a first-person shooter video game set in continental Europe after it has been overrun by horrific and murderous clones called Zeds. The Zed outbreak was caused by experiments from Horzine Biotechs gone wrong, quickly spreading across the European Union. As governments have collapsed, communication networks failed and military forces were eliminated, a motley group of civilians, soldiers, and mercenaries banded together to fight off these outbreaks from privately funded bases across Europe. Players are sent into hot zones to exterminate all threats with whatever means necessary - welcome to the Killing Floor!