From Valve Developer Community
This page is for the Steam content distribution system. For the in-game effect, see env_steam.
Steam is Valve's distribution platform, created to kick-start the digital distribution era for games. Steam allows users to easily purchase, download, play and update games online. It also helps developers, by allowing them to break out of the innovation-crushing 'retail and publisher' distribution model and offering them huge improvements to their profit margins and creative freedom.
Steam Status & Statistics
For more information on Steam and how to get it, visit the official Steam Homepage.
For pages in the Steam category, go to Category:Steam.