Top Alternatives to Killing Floor

Killing Floor is a heart-pounding cooperative first-person shooter that plunges players into the midst of horrific Zed outbreaks across various maps. Team up with friends to survive waves of monstrous creatures, strategically utilizing a diverse arsenal of weapons and a unique perk system to defend against the relentless onslaught.

Alien Swarm is a free-to-play, top-down cooperative shooter developed by Valve. Players control a squad of marines battling hordes of extraterrestrial enemies in various sci-fi environments, emphasizing teamwork and tactical gameplay.