Contagion

Action, Indie, Adventure, Multi-player, Steam Achievements, Steam Trading Cards, Partial Controller Support, Steam Cloud, Stats, Single-player, Co-op, Shared/Split Screen, Steam Leaderboards, Steam Workshop, Includes level editor, Captions available, Online Co-op, Shared/Split Screen Co-op, Online PvP, Shared/Split Screen PvP, PvP, Remote Play Together, Family Sharing, Tradable

Link to the game in Steam

Contagion isn't your average Zombie Shooter but instead takes a more realistic and different approach to the popular genre with unique characters, environments, weapons, items, and a built in system that makes every round completely unpredictable with resources, objectives, and paths ever changing.