Killing Floor 2

Tripwire Interactive's co-op zombie FPS. Up to six players fight through escalating waves of ZED specimens across nine perk-based loadouts (Berserker, Commando, Support, Field Medic, Firebug, Gunslinger, Sharpshooter, SWAT, Survivalist), plus a PvP Versus Survival mode where one side controls the ZEDs. Available on PC (Windows/Linux), PlayStation 4, and Xbox One.