DayZ

Action, Adventure, Massively Multiplayer, Multi-player, Steam Achievements, Steam Cloud, Valve Anti-Cheat enabled, Co-op, Steam Workshop, MMO, Online Co-op, Online PvP, PvP, Tradable

Link to the game in Steam

How long can you survive a post-apocalyptic world? A land overrun with an infected "zombie" population, where you compete with other survivors for limited resources. Will you team up with strangers and stay strong together? Or play as a lone wolf to avoid betrayal?