'The game's two-player co-operative mode features its own entirely separate campaign with a unique story, test chambers, and two new player characters,' it said. Although it has subsequently been edited, the page previously confirmed co-op. 'Players will explore never-before-seen areas of the Aperture Science Labs and be reunited with GLaDOS, the occasionally murderous computer companion who guided them through the original game.' 'Portal 2 introduces a cast of dynamic new characters, a host of fresh puzzle elements, and a much larger set of devious test chambers,' it explained. According to Game Informer's latest preview, it's also heading to Mac.Ī GameStop product page filled in some of the blanks.

That's according to various reports and scans that have popped up since Friday's confirmation that Portal 2 is due out this year on PC and Xbox 360.

Portal 2 features a separate two-player co-operative campaign, playable over the internet, and new gameplay features include physics-changing paint.

Portal 2 coop level 6