Mike Ambinder is the company's very own experimental psychologist and he's been outlining some of Valve's work with biofeedback technology, including eye-motion controls for Portal 2 and perspiration-based gaming adjustments on Left 4 Dead.

ENGADGET

They might be making a mark with new ways to play like motion controls, glasses-free 3D and touchscreen controllers, but alternatively they keep relying on the same few franchises to carry their entire brand.

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When it was first announced, journalists looked at the chance to swing lightsabers and force-choke stormtroopers with motion controls with cautious optimism, but as time went on, it became clear that this title was heading south.

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But that being said, despite far less horsepower than its opponents, Nintendo has trounced Sony and Microsoft in sales, due to innovation in the then-new field of motion controls.

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