Using a highly experimental portal device, you’ll once again face off against a lethally inventive, power-mad A.I. named GLaDOS. And this time you won’t be alone. Meet an expanded cast of characters as you think your way through dangerous, never-before-seen areas of Aperture Laboratories.
Break the laws of spatial physics in ways you never thought possible, with a wider variety of portal puzzles and an expansive story.

This is not official Portal by Valve Corporation

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