Sometimes these user permissions break and need to be refreshed.
Steam supports Windows, OS X, Linux, Anroid and Play Station 3.
Steam provides the user with installation and automatic updating of games on multiple computers, and community features such as friends lists and groups, cloud saving, and in-game voice and chat functionality.
The software provides a freely available application programming interface (API) called Steamworks, which developers can use to integrate many of Steam's functions into their products, including networking, matchmaking, in-game achievements, micro-transactions, and support for user-created content through Steam Workshop.
The Steam platform is considered to be the largest digital distribution platform for PC gaming, and was estimated by Screen Digest to have 75% of the market space in October 2013.
In 2015, users purchasing titles through Steam or through Steam keys from third-party vendors totaling around .5 billion representing 15% of the global PC game sales for the year, based on estimations made by the tracking website Steam Spy.