BOOM! Epic Games announced that Unreal Engine 4 will be free for any developer in the world who wants to use the latest iteration of the powerful graphics engine UNREAL Engine. Epic Games will provide all the tools, features, platforms, source code, complete projects, sample content, frequent updates and bug fixes.
What he asks in return Epic Games, is a 5% profit per quarter, which will be effective after acquiring the first $3000 revenue. Those using the graphics engine for film projects, consulting projects such as architecture, simulation and visualization, will not have to pay any royalties.