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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 has since been repackaged on Windows as a standalone game in April 2008. [28] A Mac OS X client was introduced simultaneously with the release of the Steam client for that platform in May 2010; as part of its promotion, the game was released free of charge for both platforms during which at least 1.5 million players downloaded it. [29] [30]
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.
Portal Reloaded is a single-player mod for Portal 2 created by Jannis Brinkmann and was released on April 19, 2021, exactly 10 years after the release of Portal 2. [186] The mod gives players the ability to fire a third portal, the "time portal", to travel between the present and future versions of each test chamber.
Untitled role-playing game (I): a fantasy, action role-playing game about fairies that was in a prototype phase and cancelled prior to Left 4 Dead 's release. [148] The Crossing: a first-person shooter developed in collaboration with Arkane Studios. The project was announced in 2007 and put on hold in May 2009. [149] Stars of Blood: a space ...
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.
Steam on Windows also relies on some security features built into later versions of Windows. Support for XP and Vista was dropped in 2019. While users still on those operating systems can use the client, they do not have access to newer features. Around 0.2% of Steam users were affected by this when it began. [294]
Potato Sack is an alternate reality game (ARG) created by Valve and the developers of thirteen independent video games to promote the release of Valve's game Portal 2, in April 2011. Valve president Gabe Newell envisioned the game as a "Cross Game Design Event" in December 2010, and allowed the developers free rein to design the game using ...