Unreal Engine

The Unreal Engine is a game engine developed by Epic Games, first showcased in the 1998 first-person shooter game Unreal. Although initially developed for first-person shooters, it has been successfully used in a variety of other genres, including stealth, fighting games, MMORPGs, and other RPGs. With its code written in C++ (CPlusPlus), the Unreal Engine features a high degree of portability and is a tool used by many game developers today, with it being source-available. https://en.wikipedia.org/wiki/Unreal_Engine