The game uses a highly-modified version of the Unreal Tournament engine, which was quite a challenge for the developers in order to get it to run well on the Xbox. For the that specific version, the original AI routines were rewritten and a shader system was added. For the PC version, however, they made use of the additional power and memory to create advanced water effects and dynamic shaders.
For the German release of the game, all of the blood effects were removed.