Technical
Invisible War uses a heavily modified version of the Unreal Engine 2 developed by Epic Games, Inc. Amongst the added or replaced features are a custom renderer with real-time lighting and the Havok v2.0 middleware physics engine, as opposed to the Unreal Engine's Karma middleware solution. Havok v2.0 is also seen in such titles as Max Payne 2: The Fall of Max Payne and Painkiller. Many objects in the world have size, weight, mass and can be picked up and thrown, nudged, or blown around by the force of an explosion. Lights can be moved, and this alters the shadows cast by objects.
As a consequence of console-oriented development, the game's levels are significantly smaller than those seen in the original Deus Ex. The development for Xbox also has had consequences for the game's graphics; the game's characters are slightly less detailed and have somewhat lower polygon counts than those seen in, for example, Unreal II.
Read more about this topic: Deus Ex: Invisible War
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