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2. Portal (video game) - Wikipedia

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

   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 Reloaded - Wikipedia

   en.wikipedia.org/wiki/Portal_Reloaded

   The mod was released for free on Steam on April 19, 2021, to coincide with Portal 2 ' s ten-year anniversary. The Cooperative Update. In May 2023, two years after Portal Reloaded ' s initial release, Brinkmann announced that twenty new test chambers, designed for cooperative play, will be added to the mod as part of "The Cooperative Update".

5. Portal Stories: Mel - Wikipedia

   en.wikipedia.org/wiki/Portal_Stories:_Mel

   On 25 June 2015, the mod was released on Steam as a free download for owners of Portal 2, alongside some developer commentary videos on YouTube. In response to complaints about the high difficulty level of the mod, the developers released a "Story Mode" campaign on 31 August 2015, with certain puzzles tweaked to reduce their difficulty. The ...

6. Steam (service) - Wikipedia

   en.wikipedia.org/wiki/Steam_(service)

   In 2012, Valve announced Steam for Schools, a free function-limited version of the Steam client for schools. It was part of Valve's initiative to support gamification of learning. It was released alongside free versions of Portal 2 and a standalone program called "Puzzle Maker" that allowed teachers and students to create and manipulate levels ...

7. Portal 2 - Wikipedia

   en.wikipedia.org/wiki/Portal_2

   Portal 2 is a 2011 puzzle-platform game developed by Valve for Windows, Mac OS X, Linux, PlayStation 3, and Xbox 360. The digital PC version is distributed online by Valve's Steam service, while all retail editions were distributed by Electronic Arts. A port for the Nintendo Switch was included as part of Portal: Companion Collection .

8. Portal Revolution - Wikipedia

   en.wikipedia.org/wiki/Portal_Revolution

   Portal: Revolution is a 2024 free modification for Portal 2 created by Second Face Software. As with the official Portal games, it is a puzzle-platform game that involves using portals to navigate test chambers. It also adds several new mechanics, such as suction vents and paired laser cubes. Taking place prior to the events of Portal 2 ...

9. Valve Corporation - Wikipedia

   en.wikipedia.org/wiki/Valve_Corporation

   Valve Corporation, also known as Valve Software, is an American video game developer, publisher, and digital distribution company headquartered in Bellevue, Washington. It is the developer of the software distribution platform Steam and the game franchises Half-Life, Counter-Strike, Portal, Day of Defeat, Team Fortress, Left 4 Dead, and Dota .