Features single and multiplayer co-op modes. The single-player portion of Portal 2 introduces a cast of dynamic new characters, a host of fresh puzzle elements, and a much larger set of devious test chambers. 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. The game's two-player cooperative mode features its own entirely separate campaign with a unique story, test chambers, and two new player characters. This new mode forces players to reconsider everything they thought they knew about portals. Success will require them to not just act cooperatively, but to think cooperatively.

"When the PlayStation 3 was introduced, I was the one of the platform's biggest critics," said Gabe Newell, president and co-founder of Valve. "However, Sony Computer Entertainment has proved that the PlayStation 3 is the most open platform of all the current generation consoles and has worked extremely hard to make the platform the most desirable for consumers and developers. As such, we are delighted to announce Portal 2 for the PlayStation 3 and believe the Steamworks support included will make it the best console version of the game."

On the PS3 Portal 2 will be supported by Steamworks, a complete suite of game features and services including auto updates, community features, downloadable content, and more. Previously deployed on the PC and the Mac, Valve's Steamworks development platform will make it possible to deliver the higher level of service gamers have come to expect.

"Valve is one of the industry's leading studios and Portal is one of the most innovative properties launched in the past 10 years," said Rob Dyer, senior vice president of publisher relations at Sony Computer Entertainment America. "Valve's decision to bring Portal 2 to the PlayStation 3 with Steamworks support is incredible validation of the power and openness and momentum of PlayStation 3."