Unreal Engine 2 game engine

Platforms

• Unreal Engine 2 offers broadened hardware and software compatibility;
  it runs at acceptable frame rates on graphics cards shipped in 1999,
  and even runs on fast machines with integrated graphics through
  optimized software rendering libraries.


• While Windows XP is the primary development and deployment platform for
  Unreal Engine 2, the Unreal Tournament product family has long been
  known for support for other operating systems.
• Unreal Tournament 2004 is no exception, with full server and client support for both Linux and Macintosh's OS X.


• Unreal Engine 2 is also already compatible with next-generation
  operating systems such as 64-bit Windows and 64-bit Linux.

Console Support & Portability

• Fully optimized for and supported on Windows and Xbox.
• Optimized seek-free DVD-based loading support for Xbox.
• Fully functioning source code available for PlayStation2.
• Fully functioning source code available for 64-bit Windows, MacOS X, Linux 32-bit and 64-bit.


• Highly modular, object-oriented foundation with few hard coded limits
  maintains portability and allows the Unreal engine to evolve through
  many generations of technological advances.

General Programming

• Unreal
  Engine 2 includes example content and 100% of the source code for the
  engine, editor, XSI/Max/Maya exporters, and the game-specific code for
  our internally-developed games.
• Extensible,
  object-oriented C++ engine with software framework for persistence,
  dynamic loading of code and content, portability, debugging.
• UnrealScript
  gameplay scripting language provides automatic support for metadata;
  garbage collection; profiling; persistence with very flexible file
  format backwards-compatibility; support for exposing script properties
  to level designers in UnrealEd; a GUI-based script debugger; and native
  language support for many concepts important in gameplay programming,
  such as dynamically scoped state machines and time-based (latent)
  execution of code.