Unreal Engine 3

Unreal Engine 3 (UE3) is a computer game engine developed by Epic Games. It is the third generation of the Unreal Engine, designed for DirectX 9-, 10-, and 11-capable PCs, the Xbox 360, the PlayStation 3, and OpenGL-based OSes (Mac OS X, iOS). Its renderer supports many advanced techniques including HDRR, per-pixel lighting, and dynamic shadows, and builds upon the tools available in previous versions of the engine.

Epic has used this version of the engine for their in-house games Unreal Tournament 3, Gears of War, and an improved version for Gears of War 2. Due to aggressive licensing, this current iteration has garnered a great deal of support from several big licensees, including Atari, Activision, Capcom, Disney, Konami, Koei, 2K Games, Midway Games, THQ, Ubisoft, Sega, Sony, Electronic Arts, Square Enix, 3D Realms, and more.