About game
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Release date
2010.07.19 (Steam)
2010.07.10. (Original)
Genre
ShooterDeveloper
ValvePublisher
ValveEngine
SourceMode
Single PlayerCo-operativeMultiplayerPerspective
Bird View / IsometricTheme
ActionScience FictionWarfareMore tags
AliensShoot 'em Up3dMilitaryFuturisticOnline Co-opBullet TimeHacking Achievement list
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