Duke Nukem Advance

Alien scientists are working at taking over earth, and have already occupied the secret military base, Area 51. But little do they know that Duke Nukem is back and on their case, and he'll be travelling around the world, from Egypt to Australia, to make sure he's shot, frozen and/or stamped on every one of these creeps; and pick up a few girls while he's at it. There are 19 stages to be completed, each hosting their own secrets and colored keycards, not to be mention the alien nasties themselves...