About game
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Release date
2008.11.17 (Steam)
2008.11.17. (Original)
Genre
ShooterDeveloper
Certain AffinityTurtle Rock StudiosValvePublisher
ValveEngine
SourceMode
Single PlayerMultiplayerCo-operativePerspective
First PersonTheme
ActionHorrorSurvivalMore tags
ZombiesPost-apocalypticArtificial Intelligence Achievement list
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