Originally slated for a summer release, Valve have finally come forth with information regarding the Portal 2 DLC. As originally stated when the news first came out, the DLC pack is free. The DLC is itled Peer Review and will release on 4th October. This pack will add some more puzzles to the co-op story, expanding the story of P-Body and Atlas. It will also include single player and co-op challenge modes. So will you be picking up this free DLC, or did GLaDOS outsmart you too much?