Today, Valve released two new videos from the Portal 2 demonstration at E3. Check out the Aperture Science training videos for the Pneumatic Diversity Vents and the Thermal Discouragement Beams for a sneak peak at some of the first-person puzzler%26rsquo;s new brain teasers.
Watch Portal 2%26rsquo;s clever new trailers, for science!
Valve%26rsquo;s daily videos introduce Portal 2%26rsquo;s disembodied Anglo sidekick and new gameplay, with more to come
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