Features a grandiose storyline with new enemies, music, sounds, textures and sports 8 levels. Defeat the new emperor and stop the alien engineered plague...
3 levels, increasing in difficulty and complexity. First, you go through a prison complex before entering an "Anti-Duke" training center where the aliens learn how to fight against Duke. In the finale, you have to find the power plant to shut down the whole installation.
5 levels (1 secret, 1 for credits without any action)You start in a common city area before entering a desolated factory. The last regular level is set in war-torn Bosnia with great ambient sounds, some traps and destroyed buildings.
Waking up from deep sleep on a space station, you find the place overrun by aliens; your only option is to destroy the reactor and get the hell out of there in an escape pod.