Valve Corporation, gaming company, founded by Gabe Newell, digital distribution platform, PC gaming, Steam client, game library, user profiles, multiplayer gaming, video streaming, social networking services, game development tools, storefront, Half-Life, Counter-Strike, Dota 2, Team Fortress, virtual reality, SteamVR, Steam Controller, Steam Machine, community-driven, workshop, mods, sales, discounts, global service, cloud saves, achievements, trading cards, user reviews, Steam Direct, Greenlight, Source engine, Steamworks, API, digital rights management (DRM), anti-cheat technology, VAC, Steam Link, in-home streaming, Big Picture mode, family sharing, Steam Cloud Play, remote play, SteamOS, Linux-based operating system, gaming industry, market leader, digital ecosystem, continuous updates, user experience, innovation, Steam Deck, handheld gaming device.