Challenge your perception of physics and space in Portal 2 for the Xbox 360. This award-winning first-person puzzle-platformer builds upon the groundbreaking mechanics of its predecessor, introducing new puzzle elements like excursion funnels, laser redirection cubes, and special gels that alter surface properties. Immerse yourself in a hilarious and engaging single-player story featuring the return of GLaDOS and the bumbling Wheatley, or collaborate with a friend in a dedicated cooperative campaign with its own unique test chambers and narrative. Portal 2 is a triumph of innovative gameplay and sharp writing.