Co-op is a major factor in Portal 2. Not only does it earn its own separate campaign in the game, but its two star players made the final box art.
Portal 2 arrives for PlayStation 3, Xbox 360, and PC on April 18, 2011. Alongside its co-op campaign, a single-player campaign featuring the return of the first game’s protagonist, Chell, and antagonist, GLaDOS, will also be available. A number of new puzzle-aiding instruments will be introduced, including the propulsion and repulsion gels, air vents, beams, excursion funnels, faith plates, and more.
Check out the high-res box art at the gallery.
