: Over 20 unique chambers (12 single-player, 8 co-op) designed specifically for motion controls.
The "Complete" edition typically refers to the base game along with the three primary official expansions. 1. Peer Review (DLC 1) Portal 2 (Inclu ALL DLC)
: A new cooperative track for ATLAS and P-Body . You assist GLaDOS in hunting a "mysterious intruder" within Aperture. : Over 20 unique chambers (12 single-player, 8