Jamie Laike Tsui of Capsule Computers writes:
"In 2005 a small mod for Unreal Tournament 2004 invited gamers to London, England. The city was in the middle of a zombie outbreak caused by Horizine Biotech. Fast forward ten years and the mod is growing into its second retail release. Tripwire Interactive is now looking to take the very best parts of Killing Floor and ratchet up the dial to 11 in Killing Floor 2 to create a gory, yet classy co-op shooter."