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Portal 2: Peer Review (2011)

Xbox 360 PlayStation 3

Release Date:	2011, October 4
Publishers:	Valve

Description:

Portal 2: Peer Review includes an additional course for Portal 2 co-op campaign, dubbed "Art Therapy"; as well as Challenge Mode for both single-player or multiplayer campaign, where players can play specific levels and compete in friends/worldwide leader-board.

Portal 2: Peer Review (2011)

Description:

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