The leading videogame engine Unreal Engine 4 is now available… “to everyone for free, and all future updates will be free!”…
“You can download the engine and use it for everything from game development, education, architecture, and visualization to VR, film and animation. When you ship a game or application, you pay a 5% royalty on gross revenue after the first $3,000 per product, per quarter. It’s a simple arrangement in which we succeed only when you succeed.”