Play, join game groups, chat, create content, with Steam
Steam is a platform you can use to enjoy instant access to games and game updates, join game groups, form clans, chat in-game, gift your friends, trade items, create new content for games in the Steam Workshop.
The software provides a freely available interface 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.
By the end of 2015, the service had over 125 million registered accounts, with 12.5 million concurrent users.