Portal 2 'PAX Co-Op Gameplay Part 3' Trailer

This is the 3rd part in a 4 part series of gameplay trailers showing off the Co-Op aspects of Portal 2

Top 3 Portal 2 'PAX Co-Op Gameplay Part 3' Trailer Alternatives

Part 5 introduces Pneumatic Diversity Vents, a new gameplay...

Part 2 introduces Excursion Funnels, a new gameplay mechanic...

This is part 2 of the 4 part Co-Op gameplay demo for Portal...

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