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Unreal Engine 2

Software entity

Second generation Unreal Engine by Epic Games.

105
games
10
platforms

Alternate names: Unreal Engine 2X, Unreal Engine 2.5

The first video game about Unreal Engine 2 was released in 1998.

Ubisoft, Atari and Tripwire Interactive has published most of these games

Internals:
* DirectX versions 6, 7, & 8 supported.

Rendering:
* OpenGL
* Direct3D
* Software

Sound:
* OpenAL
* Miles Sound System (with separate license)
* EAX 3 with fallback to EAX 2
* Ogg Vorbis and WMA playback

* Dolby Digital Surround
* Voice chat
* Text-to-speech
* Speech recognition

Platform support:
* Windows and Linux support on both 32 and 64 bit architectures.
* PlayStation 2
* Xbox
* Mac OS X

Some extra info:
* Written and extensible in C++

The engine source seems to go with the engine license, so many games using the engine likely have some custom modifications done that expand its functionality beyond what is stated here.
- source