Mobile apps to access online Steam features were first released for iOS and Android in 2012.

Initially developed for Microsoft Windows operating systems, Steam was released for macOS in 2010 and Linux in 2012. Valve released a freely available application programming interface (API) called Steamworks in 2008, which developers can use to integrate Steam's functions into their products, including in-game achievements, microtransactions, and user-created content support. Users receive automatic game updates, cloud storage for game progress, and community features such as direct messaging, in-game chats and a community market. Steam offers various features, like digital rights management (DRM), game server matchmaking, anti-cheat measures, social networking and game streaming services. It was launched as a software client in September 2003 as a way for Valve to provide automatic updates for their games, and expanded to distributing third-party game publishers' titles in late 2005.

Steam is a video game digital distribution service and storefront from Valve.

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