Epic Games is the studio behind Fortnite, the Unreal Engine, the Epic Games Store, MetaHuman, RealityScan, Twinmotion, RAD Game Tools, and the Epic Online Services (EOS) backend. Epic operates a unified developer portal at dev.epicgames.com that hosts the EOS SDK and REST APIs (Auth, Connect, Friends, Presence, Lobby, Sessions, Achievements… - View it on GitHub