In KILLING FLOOR 2, players find themselves in Europe, where a rapidly spreading and unstoppable outbreak, resulting from a failed experiment by the Horzine Biotech corporation, has paralyzed the European Union. Just one month after the events of the original KILLING FLOOR, clone species have spread everywhere, causing chaos in civilization. Communication has ceased, governments have collapsed, and military forces have been systematically wiped out. The people in Europe, skilled in self-defense and survival, had to protect themselves, and the fortunate ones managed to hide.