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  2. Portal (video game) - Wikipedia

    en.wikipedia.org/wiki/Portal_(video_game)

    Portal is a 2007 puzzle-platform game developed and published by Valve.It was released in a bundle, The Orange Box, for Windows, Xbox 360 and PlayStation 3, and has been since ported to other systems, including Mac OS X, Linux, Android (via Nvidia Shield), and Nintendo Switch.

  3. Portal (series) - Wikipedia

    en.wikipedia.org/wiki/Portal_(series)

    Portal is a series of first-person puzzle-platform video games developed by Valve.Set in the Half-Life universe, the two main games in the series, Portal (2007) and Portal 2 (2011), center on a woman, Chell, forced to undergo a series of tests within the Aperture Science Enrichment Center by a malicious artificial intelligence, GLaDOS, that controls the facility.

  4. Portal 2 - Wikipedia

    en.wikipedia.org/wiki/Portal_2

    Portal 2 is a 2011 puzzle platform game developed by Valve for Windows, macOS, Linux, PlayStation 3, and Xbox 360.The digital PC versions are distributed online by Valve's Steam service, while all retail editions are distributed by Electronic Arts.

  5. Valve releases new, free 'Portal' game that 'isn't Portal 3'

    www.aol.com/valve-releases-free-portal-game...

    Portal fans rejoice — or rather, bask in the mixed feelings of getting a new game set in their beloved franchise's universe that isn't at all what they've been clamoring for over the past decade ...

  6. Portal-maker Valve cryptically announces free-to-play game - AOL

    www.aol.com/2011/06/20/portal-valve-free-play-game

    It's only been just over a week since Valve brought five fancy free-to-play games to Steam, its digital games distribution service. And already the developer slash online marketplace curator has ...

  7. The Orange Box - Wikipedia

    en.wikipedia.org/wiki/The_Orange_Box

    The Orange Box is a video game compilation containing five games developed and published by Valve.Two of the games included, Half-Life 2 and its first stand-alone expansion, Episode One; had previously been released in 2004 and 2006 as separate products.