Steam also offers a framework for selling and distributing downloadable content (DLC) for games.
In September 2013, Steam introduced the ability to share most games with family members and close friends by authorizing machines to access one's library.
Today Valve has released an update for Steam VR, the virtual reality mode for the popular game distribution service.
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80,000–300,000 gamers tested the system when it was in its beta period.
Around that time, Valve began negotiating contracts with several publishers and independent developers to release their products, including Rag Doll Kung Fu and Darwinia, on Steam.
Although digital distribution could not yet match retail volume, profit margins for Valve and developers were far larger on Steam.
Initially, Valve was required to be the publisher for these titles since they had sole access to the Steam's database and engine, but with the introduction of the Steamworks software development kit (SDK) in May 2008, anyone could potentially become a publisher to Steam, outside of Valve's involvement to curate titles on the service.
In May 2012, the service added the ability for users to manage their game libraries from remote clients, including computers and mobile devices; users can instruct Steam to download and install games they own through this service if their Steam client is currently active and running.
For games that incorporate Steamworks, users can buy redemption codes from other vendors and redeem these in the Steam client to add the title to their libraries.The Steam website also replicates much of the storefront and social network features of the stand-alone application.By November 2015, the service had as many as 12.5 million concurrent users and had over 125 million registered accounts.This decision was met with concerns about software ownership, software requirements, and issues with overloaded servers demonstrated previously by the Counter-Strike rollout.and Valve announced that Steam had become profitable because of some highly successful Valve games.The CEG technology creates a unique, encrypted copy of the game's executable files for the given user which allows them to install it multiple times and on multiple devices, and make backup copies of their software.