What is "unreal-engine"
Unreal Engine is an integrated toolkit for designing and building games, simulations and visualizations. Made by Epic Games.
Operates through various platforms such as Windows, Mac and Linux. And offers a wide range of core technologies, content creation tools and supporting infrastructure for creating high-quality games and applications.
In its current version, Unreal Engine 4, it is possible to produce solutions in DirectX ( Microsoft Windows, Xbox One, Windows RT), OpenGL (OS X, Linux, Playstation 4, iOS, Android, Ouya and Windows XP), and JavaScript/WebGL (HTML5).
List of games https://en.wikipedia.org/wiki/List_of_Unreal_Engine_games