Killing Floor is a game that is deliberately demented. It takes the derivative zombie shooting FPS formula and mixes it in with a diverse array of weapons and a deranged cast of enemies. Though sometimes repetitive and unforgiving, you’ll still find no shortage of AK-47s, chainsaws, flamethrowers and more while killing almost every zombie imaginable: fat zombies, thin zombies, invisible zombies and spider-zombies just to name a few.