This is a singleplayer level based around a large bright open (non-canyon) outdoor setting, with terrain and additional areas creating a range of battle situations. "Unreal Zero" modified gameplay emphasizes action combat, but with the extra complexities of the Unreal beasts and weapons.
Here: http://www.intergate.com/~spentron/unreal/index.html
Here: http://www.intergate.com/~spentron/unreal/index.html