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 ...

This extended trailer for Portal 2's co-op mode, shown to attendees at PAX 2010 behind closed doors, adds narration from GLaDOS. I'm sure you've seen the two loveable robots before, but this video ...

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 ...

As Portal 2 passes three weeks since its release, now is the time to look back on cooperative play and see how it has held up. As a GeekDad who does not yet have children of video game-playing age, I ...

To start, one player will need to portal up to the upper platform and press the button there to release the repulsion gel. Once it is on the ground, hop down to the button on the floor and it will ...

Valve has released an update for the classic title Portal 2 with a big list of changes. Despite Portal 2 being a decade old, this patch implements multiple additions and fixes a series of issues ...

Valve showed off the first gameplay footage of the Portal 2 coop mode, set to be one of the highlights of the game. The walkthrough video shows us glimpses of some of the new features and gameplay ...

Valve has released the newest Portal 2 co-operative trailer, featuring the two robots we've seen time and time again... but now, they have names! They are Atlas, the short, round, blue-eyed one, and P ...

After repeatedly trying to play Portal 2's co-op and being paired with complete a**holes, I have given up on random matchmaking. If anyone is in the same situation and looking for somebody to play ...

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 ...

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 ...