Valve has released an HD version of the Portal 2 co-op trailer complete with Glados commentary, and we have it posted for you below.
The co-op portion of the game features its own playable characters, story, tests, and may be played in split screen on the consoles or over a network connection.
Portal is out on Mac, PC, PS3, and Xbox 360 February 9.
Checkout our impressions of it here.
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