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All new PS3 copies of Portal 2 come with a Steam key to download the PC/Mac version for free! PC version normally around £25 alone! Even better, trade/sell the PS3 copy after you've registered the code and get Portal 2 on PC for almost nothing.
Portal 2 draws from the award-winning formula of innovative gameplay, story, and music that earned the original Portal over 70 industry accolades and created a cult following.
The single-player portion of Portal 2 introduces a cast of dynamic new characters, a host of fresh puzzle elements, and a much larger set of devious test chambers. Players will explore never-before-seen areas of the Aperture Science Labs and be reunited with GLaDOS, the occasionally murderous computer companion who guided them through the original game.