Valve has released an extended co-op trailer for Portal 2, originally shown at PAX.
The GLaDOS-voiced footage features various co-op antics from the two robot chaps who’ll be the playable characters in co-op mode. GLaDOS appears to be banking on them having no discernible emotions, but the video shows them clearly displaying empathy, fear and affection – so that may end up causing something of a problem.
Towards the end, GLaDOS alludes to a mysterious “real purpose” she has planned for the duo which will make all of their prior testing worthwhile.
View the video, below.

Paul Younger
Founder and Editor of PC Invasion. Founder of the world's first gaming cafe and Veteran PC gamer of over 22 years.

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