Portal is a 2007
first-person puzzle-platform video game developed by
Valve Corporation. The game was released in a
bundle package called
The Orange Box for
Microsoft Windows and
Xbox 360 on October 9, 2007, and for the
PlayStation 3 on December 11, 2007. 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. A standalone version called was released on the
Xbox Live Arcade service on October 22, 2008; this version includes an additional 14 puzzles. An
OS X version was released as part of the Mac-compatible Steam platform on May 12, 2010. A Linux version was released on Steam as a beta on May 2, 2013, and came out of beta on June 24, 2013. An
Android port for the
Nvidia Shield was released on May 12, 2014.