Doom II - Platform: Gameboy Advance Press Start to pause the game, then hold L + R and enter one of the codes. Code Result ------------------------------- A, A, B, A, A, A, A, A. God mode A, B, B, A, A, A, A, A. All weapons, items, keys B, A, A, A, A, A, A, A. Computer map B, B, A, A, A, A, A, A. Radiation suit B, B, B, A, A, A, A, A. Invincibility B, A, B, A, A, A, A, A. Berserk A, A, B, A, B, B, B, B. Disable God mode