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Portal 2 Review (Xbox 360) | stuffthatiwriteabout
Portal 2 PC adds splitscreen co-op - GameSpot
Playing splitscreen for the first time. How do I switch which side of the screen I appear on? I want to be on the left not the right. I'm playing on mouse
Co-Optimus - Review - Portal 2 Co-Op Review
Portal 2 co-op video walkthrough | GamesRadar+
Portal 2 Co-Op Hands-On - GameSpot
Co-Optimus - News - New Portal 2 Box Art Pushes Co-op
The Best Games to Play With Friends - Co-Op, SplitScreen!
Portal 2 Splitscreen and Online Co-Op Detailed.
Portal 2: Classics (Xbox 360) : Amazon.co.uk: PC & Video Games
Portal 2 PC - local co-op (splitscreen) gameplay - YouTube