Killing Floor review. Classic Game Room presents a CGR Undertow review of Killing Floor for PC developed by Tripwire Interactive and published by Tripwire Interactive. Killing Floor was created and published by Tripwire Interactive in 2009. However it was initially a mod for Unreal Tournament 2004 that was released in 2005. The game itself is a class-based first person wave shooter with survival horror elements. There are always giant hordes of enemies one must fight, and they can all do a great amount of damage. There are numerous classes to choose from and each have different buffs and effects on certain weapon types. As you complete more and more waves, more and more enemies spawn,and they get harder and harder as you continue playing. The game has a very strong modding community with numerous gameplay tweaks and custom levels being made on a regular basis. This video review features video gameplay footage of Killing Floor for PC and audio commentary from Classic Game Room's Jon.