Duke Nukem 3D (Genesis)
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Cheat Codes
While the game is paused (to pause, hold X and press Y or hold START and press A+B) enter the following sequences:
Effect
Code
"Giving Everything!" (All Items)
A, C, Left, A, B, Down.
"Go to Next Level" (Skip Level)
Up, Left, Right, B, B, A.
"God Mode" (Invincibility)
Up, A, Down, B, C, Down.