The first downloadable content pack for Portal 2 will be hitting Steam, PlayStation Network and Xbox Live Arcade on October 4.
The DLC is for the co-op mutliplayer, called “Peer Review”, in which robot buddies P-Body and Atlas engage in some new tests given by GLaDOS. If that weren’t enough, the DLC also features a new challenge mode for single-player and co-op modes, including leaderboards.
