Duke Nukem Cheats - GameBoy Color
Primary Collection of Cheats
Invincibility
Press [Up], [Down]x2, [Left], [Right], [Left], [Up]x2 at the title screen.
Level select
Press [Left], [Right], [Up]x2, [Down], [Up], [Right], [Left] at the title screen.
Rapid-fire gun
Begin game play on level 4 to get to the diagonal platform. Repeatedly press [A] to keep going on the platform and find a rapid-fire gun.
Avoid damage from falls
Pause game play just before hitting the ground. When game play is resumed, you will land without damage.