Epic Games CEO Tim Sweeney is No. 194 on this year's list of the world's 500 richest people. Epic Games makes, for instance, the Unreal Engine, a set of software tools used to build some of the world's biggest games. When game developers and publishers sell games made with Unreal Engine, Epic Games gets a fee. Epic Games launched Fortnite in summer of 2017, and is clocking hundreds of million dollars in revenue just from the Fortnite game. The company's latest move is launching an online storefront for game developers and publishers.