Killing Floor
Tripwire Interactive's wave-based co-op horde shooter, grown from a 2005 Unreal Tournament 2004 mod into a standalone genre landmark, still draws deeply personal devotion from a community that's stuck with it for well over a decade — tempered by a specific, well- corroborated complaint that later paid weapon-pack DLC tilted balance in a way free content updates never did.
7.5 / 10
