It's been an exciting couple days at PAX, especially if you're a Portal 2 fan! We're following up the co-op campaign screenshots released yesterday - with actual footage from the co-op Portal 2 ...

GameSpot may get a commission from retail offers. According to GLaDOS, Portal 2's dry-witted antagonist, scientific achievement is all about cooperation. That's why one of history's greatest ...

While Portal 2's single player offered a hardy challenge, the real mind benders are found in the co-op campaign. The possibilities are much bigger withfour portals, and it can befrustrating whentwo ...

Portal 2 features a separate two-player co-operative campaign, playable over the internet, and new gameplay features include physics-changing paint. That's according to various reports and scans that ...

Nine minutes of co-op gameplay for Portal 2 has come out of PAX, and it's looking pretty sweet. As the video explains, the two-player co-operative mode allows both players to control separate portal ...

The Portal Reloaded modification for Portal 2 has today released its Cooperative update bringing in new puzzles to solve in Co-op mode. According to the Steam Page Portal Reloaded is a free, community ...

"We have no plans for [3D or Move] in this game right now." Clearly, Valve are keeping the big guns for Half Life 3. In all seriousness, I'm a little disappointed there's no Move support. Admittedly, ...

To anyone who has been following Valve Software's viral marketing campaign inside Portal--comprehensively chronicled by Bit-Tech--the announcement of Portal 2 should come as no surprise. Today, the ...

For the first part of the chamber, it is pretty straight forward. Have one player use the portals to direct the light bridge and then have the second player take over when dropping onto the first ...