![]() ![]() The game primarily comprises a series of puzzles that must be solved by teleporting the player's character and simple objects using "the Aperture Science Handheld Portal Device", a device that can create inter-spatial portals between two flat planes. A Mac OS X version was released as part of the Mac-compatible Steam platform on May 12, 2010. ![]() A standalone version called Portal: Still Alive was released on the Xbox Live Arcade service on Octothis version includes an additional 14 puzzles. The Windows version of the game is available for download separately through Valve's content delivery system Steam and was released as a standalone retail product on April 9, 2008. ![]() The game was released in a bundle package called The Orange Box for Microsoft Windows and Xbox 360 on Octo and for the PlayStation 3 on December 11, 2007. Portal is a 2007 first-person puzzle-platform video game developed by Valve Corporation. ![]()
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