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Portal 2
4/18/2011
Valve
About This Game
The 'Perpetual Testing Initiative' has been expanded to allow you to design co-op puzzles for you and your friends!
Tags
ActionComedySingleplayerFunnyAtmosphericPuzzleAdventureStory RichMultiplayerStrategyOnline Co-OpCo-opSci-fiFemale ProtagonistFirst-PersonSpaceLocal Co-OpFPSScienceMasterpiece
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