Portal 2 trailer focuses on co-op

Valve's released a new trailer of Portal 2 at tonight's VGAs, which seems to focus on the co-op aspect of the puzzler.

The video sees the two co-op characters for the game being made, introducing themselves and then throwing themselves into the deep end.

Give it watch anyways.

Portal 2 releases on April 20 in the US and April 22 in the UK and Europe for PS3, 360 and PC.