All weapons and missions: Press L, Black, White, R(2), White, Black, L at the main menu. Unlimited ammunition: Press Start to pause game play, then press R, L, Black(2), White, R, L, Black, White. Repeat this code to disable its effect. Invincibility: Press Start to pause game play, then press L(3), Black, L, R(2), L, Black. Repeat this code to disable its effect.