Valve's first-person puzzler Portal 2 got a little more attention at CES this week, thanks to a tech demo of Intel's perceptual computing technology. The motion sensing technology allows Aperture Science test subjects to experience something new: solving Portal 2's puzzles with one hand.

Portal 2 In Motion developer Sixense helped Intel create the hand motion-recognition demo. Earlier versions of Sixense's motion control take on Portal 2, released for the PlayStation 3 and PC, required the use of a PlayStation Move controller or Razer's magnetic motion-sensing Hydra.

As you'll see in the video above, Intel's motion detection tech isn't perfect, but manages to make a good impression.