The Atomic Edition expansion pack gives you a 4th episode to play through in your quest to save the world from aliens. The levels are larger and there are more enemies to fight, as well as new, tougher aliens and a supremely tough final boss.
There are more comical elements in this expansion pack, but the levels are tough to work through and are more diverse. There is a new weapon at your disposal to aid you in your mission to save the babes of Earth from the alien invasion.
First-person action explodes onto the Macintosh in Duke Nukem 3D: Atomic Edition, as the irascible hero defends the human race by pounding aliens in 39 levels of non-stop mayhem and carnage. With a deadly arsenal of pistols, shotguns, grenades, machine guns, mines, cannons, bombs and more, Duke Nukem runs, swims, flies (jetpack), crawls, and jumps his way through four episodes: LA Meltdown, Lunar Apocalypse, Shrapnel City, and The Birth. Four difficulty settings allow players to ease into the action or attack with all guns blazing from the start, as Duke encounters earthquakes, skyscrapers, canyons, sewers, and more.
 Hardware Requirements
System: 486/66 or equivalent
RAM: 8 MB RAM
CD-ROM: 2X CD-ROM
Hard Drive Space: 30 MB
Sound Board: Yes