Unreal Engine (UE) is a 3D computer graphics game engine developed by Epic Games, first showcased in the 1998 first-person shooter video game Unreal. Initially developed for PC first-person shooters, it has since been used in a variety of genres of  games and has been adopted by other industries, most notably the film  and television industry. Unreal Engine is written in C++ and features a high degree of portability, supporting a wide range of desktop, mobiles, console, and virtual reality platforms.

The latest generation, Unreal Engine 5, was launched in April 2022. Its source code is available on GitHub, and commercial use is granted based on a royalty model, with Epic charging 5% of revenues over US $1 million, which is waived for games published exclusively on the Epic Games Store. Epic has incorporated features in the engine from acquired companies such as Quixel, which is seen as benefiting from Fortnite's revenue.

In 2014, Unreal Engine was named the world's "most successful videogame engine" by Guinness World Records.[2]

(From Wikipedia, the free encyclopedia)