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The Windows version of the game is also available for download separately through Valve's content delivery system, Steam, [1] and was released as a standalone retail product on April 9, 2008. [53] In addition to Portal , the Box also included Half-Life 2 and its two add-on episodes, as well as Team Fortress 2 .
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.
Portal Stories: Mel is a single-player mod of Portal 2 developed by Prism Studios, a group made up of eight fans of the Portal series. The mod was released on June 25, 2015, for Windows, OS X and Linux systems, available freely to people that own Portal 2 on Steam.
Portal Reloaded was released for free on Steam for Windows, macOS, and Linux platforms on April 19, 2021, to coincide with Portal 2 ' s ten-year anniversary. [2] [3] [13] Considering that it is a mod, users must own Portal 2 to play Portal Reloaded. [3] [5] Portal Reloaded also features a custom soundtrack.
Portal Stories: Mel is a 2015 puzzle-platform modification for Portal 2 developed and published by Prism Studios. Set in the Portal universe, the player controls Mel, a test subject with a prototype of the portal gun who must escape an underground facility after spending decades in artificial hibernation by completing puzzles.
Portal: Revolution is a 2024 puzzle-platform modification for Portal 2 developed and published by Second Face Software. Set in the Portal universe prior to the events of Portal 2, the game has the player control an unnamed test subject as she attempts to gain control of a device that will restore the Aperture Science test chambers to full condition.
Cave Johnson is a fictional character from the Portal franchise first introduced in the 2011 video game Portal 2. He is voiced by American actor J. K. Simmons and created in part by Portal 2 ' s designer Erik Wolpaw. He is referenced by a computer username in the first game and appears indirectly in Portal 2.
It is a collection of software and libraries combined with a patched version of Wine to improve performance and compatibility with Windows games. Proton is designed for integration into the Steam client as "Steam Play". [3] It is officially distributed through the client, although third-party forks can be manually installed.