Steam's Big Picture Mode -- a TV- and controller-friendly version of Valve's widely used digital gaming service -- is the first volley in Valve's big living room push.

ENGADGET

It's an overhead valve engine with a single camshaft that uses push rods to open and close the 16 valves.

FORBES: The Engine That Could

Nothing's set in stone, of course, and Valve's still very much in the exploratory phase of its Steambox push.

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