Killing Floor -

The story of the video game series centers on a catastrophic outbreak in London caused by Horzine Biotech , a corporation tasked by the British government to create "the perfect soldier"—a clone army capable of superhuman feats without fear or pain . The narrative follows the failure of this project, known as the "specimens" or Zeds , which eventually overrun the world. The Core Narrative: The Horzine Outbreak