This new mode forces players to rethink everything they thought they knew about portals. The game’s two-player collaborative mode features an entirely separate campaign with a unique story, test chambers, and two new player characters. Players will explore never-before-seen areas of the Aperture Science Labs and reunite with GLaDOS, the occasionally grueling computer companion who guided them through the original game. The single player portion of Portal 2 includes a number of dynamic new characters, a host of new puzzle elements, and a much larger number of test chambers. Portal 2 is based on the award-winning formula for innovative gameplay, story and music that earned the original portal over 70 industry awards and created a cult following.
