Prominent game studios id Software and Epic Games have famously made forays into the portable space with games like Rage and Infinity Blade. Valve Software, however, has made no such announcement and currently has no such plans.

“We’re about people sitting on their couches or at their desks,” Valve writer Chet Faliszek. “We haven’t forayed into that space. It’s just not a space our engine has been looked at or optimized for.”

Source: Kotaku.com