
Duke finds his way onto a zeppelin, which he manages to escape by flying off in an aeroplane. In the Victorian Era, Duke is plagued by the biological weaponry the aliens have been manufacturing. Duke is then informed, that it's not just American history that is being altered, the aliens have also been to the Victorian Era of London. There, he stops an alien mining project before they can succeed, and defeats Cyborg Scorpion. After blowing up a ship containing the super-soldiers, Duke makes his way to the town of Roswell, New Mexico. The aliens have begun creating super-soldiers in order to combat the human resistance, in the past and the future. However, they eventually manage to send a few of his weapons back after some tinkering. In the Old West, due to technical difficulties, Duke must make do with whatever period weaponry he can find.

After finishing his business here and defeating Giant Hog, Duke is sent back to the American Old West, where aliens have taken over in an effort to mine the Earth for its resources. The resistance have managed to develop their own time machine in order to send Duke Nukem back in time to re-write the corrupted history, and destroy the aliens. If Duke wants to restore peace to the Earth's history, he'll have to go back in time and fight for it. There, they tell him that the aliens are indeed screwing with the Earth's history, so much that this future is just one of many. Duke eventually meets up with a small band of resistance fighters in the headquarters of the United States Army in New York City. In this time zone, Duke battles the alien menace of the future, who have created an army of the undead from those who had died in the nuclear war's ensuing fallout. However, Duke manages to figure this out and unwittingly uses an alien time machine to go into the post-apocalyptic near-future, where the aliens have devastated the Earth with nuclear war, running humans to near-extinction. Here, Duke discovers the alien's true plan, to go back in time and mess with historic events, hoping they can destroy Duke's colorful heritage, so that it would be easier to take out the Earth in the future. Duke pummels the alien menace through the streets of New York with the help of some marines, and eventually gains access to the Statue of Liberty. The Victorian Era has fictional, science-fiction weaponry such as the Voltaic Projector, and features zombies.ĭuke is called into action via the Government, as a new alien, led by Zero, appears, making trouble. The Wild West has revolvers and lever-action rifles, and features Cowboy and Native American Pigs.

For example, Present Day has modern-day weapons such as automatic handguns, submachine guns and combat shotguns. Each time period has its own theme and weaponry. Duke Nukem: Zero Hour is set in four distinct time periods: Present Day, Post-Apocalyptic Near-Future, Wild West and Victorian Era ( London, 1888).
