Parent Game: Portal 2
Portal 2

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Summary

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 Activation Instructions

Game Information
Release Date October 4, 2011
Publisher Valve
Content Rated E10+ (Everyone 10+)
Game Modes Single player
Player Perspectives First person
Genres Puzzle, Adventure
Themes Comedy
Platforms PlayStation 3, Xbox 360