Action · Free To Play
Alien Swarm
★95%· 21k reviews~3 h on averageReleased 2010
ActionFree To PlayCo-opMultiplayerOnline Co-OpAliensShooterSci-fi
Co-operative multiplayer game and complete code base available for free.
In this universe
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Same universe
Other games in the series
Sequel
Alien Swarm: Reactive Drop
Released after Alien Swarm. Kept out of the recommendations so they stay clean, but worth knowing.
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