Killing Floor

Global, Action, Multi-player, Steam Achievements, Steam Trading Cards, Valve Anti-Cheat enabled, Stats, Single-player, Co-op, Cross-Platform Multiplayer, Steam Workshop, Includes level editor, Tradable

Link to the game in Steam

Killing Floor (ROW)

6-player co-op survival horror at its finest! Free updates, free special events and a ridiculous amount of fun!