About game
Release date
Apr 18, 2011
Developer
ValvePublisher
ValveFeatures
Single-playerMulti-playerCo-opOnline Co-opShared/Split Screen Co-opShared/Split ScreenSteam AchievementsFull controller supportSteam Trading CardsCaptions availableSteam WorkshopSteam CloudStatsIncludes level editorCommentary availableRemote Play on PhoneRemote Play on TabletRemote Play on TVRemote Play TogetherGenre
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Achievement list
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