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The latest video technology Aperture Science Portal 2

Valve public on the last movie of his series on technologies that we Aperture Laboratories test pad with your hand in Portal 2 when it arrives in stores April 22. This time we are shown the special boots that allow you to fall to the ground perfectly even if the characters you control plummet hundreds of feet into the void, without wasting good human guinea pigs as a result of these errors.

Portal 2 - Boots | HD version