Portal 2 is a full-length sequel to the award-winning, mind-bending puzzle action game developed by Valve. The game will be available for both Xbox 360 and PC platforms. Players will take on the role of Chell, a former test subject in Aperture Science's Enrichment Center and must use portals to solve puzzles and progress through the story of Portal 2. The game features new characters, environments, weapons, and more complex puzzles that challenge players' problem solving skills while they explore their way out of Aperture Science laboratories.