Steamworks DRM is called Custom Executable Generation (CEG) and like the every part of Steamworks, it's optional for the developers.
Portal 1 free download full game pc non steam for free#
It can be used for free and is used to integrate Steam features and solutions within PC games.
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Steam does not have any official designation for games which are/aren't DRM-free - these must be tested by the editors themselves.DRM-free games can be moved outside of the Steam folder and used freely.DRM-free games on Steam are games which do not require the Steam client or any third-party DRM in order to launch said game's respective executable or startup script (.exe.DRM-free on Steam does not refer to games which don't use third-party DRM the Steam client is DRM if it is required to run the game.Sections are listed alphabetically under their respective header. Section headers - Games are grouped in multiple categories for ease of use.This list now features all versions of the games - Windows, OS X and Linux versions that are DRM-Free will now have indicators to the right.
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Valve announced Portal 2 in March 2010, and promoted it with alternate reality games including the Potato Sack, a collaboration with several independent game developers. Jonathan Coulton and the National produced songs for the game. In the new cooperative mode, players solve puzzles together as robots Atlas and P-Body (both voiced by Dee Bradley Baker). In the single-player campaign, players control Chell, who navigates the dilapidated Aperture Science Enrichment Center during its reconstruction by the supercomputer GLaDOS (Ellen McLain) new characters include robot Wheatley (Stephen Merchant) and Aperture founder Cave Johnson (J. Portal 2 adds features including tractor beams, lasers, light bridges, and paint-like gels that alter player movement or allow portals to be placed on any surface. Like the original Portal (2007), players solve puzzles by placing portals and teleporting between them. The digital PC version is distributed online by Valve's Steam service, while all retail editions were distributed by Electronic Arts. It was released in April 2011 for Windows, OS X, Linux, PlayStation 3, and Xbox 360. Portal 2 is a puzzle-platform game developed by Valve Corporation.