If you were at this weekend's PAX Prime, you saw the first trailer featuring Portal 2's cooperative multiplayer mode. Today, Valve has released the video for public consumption, in stunning high definition.
Valve originally released a thirty second teaser version of this trailer in the run up to PAX Prime, but this new version features an extended co-op experience totaling nearly two minutes. Enough to whet your appetite ahead of Portal 2's February 9, 2011 release on the PC, PlayStation 3 and Xbox 360.
So for those of us who didn't get a chance to attend PAX Prime, here's the trailer in all its high definition, direct feed glory: