Duke Nukem sets off to save a future Los Angeles swarming with alien invaders whose mission is to enslave our world. In this exciting game of alien combat, your goal is to kill as many of the alien invaders as you can. To help along the way, pick up various weapons, such as rifles and rocket propelled grenade launchers. Shoot anything that gets in your way! You'll also need to find key cards to open certain doors, as you make your way through each level until you locate the exit. Be prepared, there will be more aliens awaiting you as you progess.