Portal 2 'Demo Walkthrough Part 1' Trailer

This is another video demo showing off the gameplay in Portal 2, be sure to check this one out it will be releasing early next year.

Top 3 Portal 2 'Demo Walkthrough Part 1' 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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