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Press Up or Down at the mission selection screen.
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| Alter Globe Speed And Direction |
Hold 4 + 6 at the mission selection screen.
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| Bonus Lives |
Hold 3 + 6 + 9 + # at the mission selection screen. A sound will confirm correct code entry. Up to nine extra lives may be selected.
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| Debug Mode |
Press Up + A + B + C + 6 during game play. The top right number indicates the current frame rate.
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| Level Skip |
Hold 2 + 4 + 6 + 7 + 8 + 9 at the mission selection screen. A sound will confirm correct code entry.
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| Switch Day And Night |
Hold Up + A + B + C + 7 during game play.
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| Unlimited Weapons, Energy, And Shields |
Hold Down + 3 + 4 + 6 + 7 at the mission selection screen. A sound will confirm correct code entry.
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| Vector Graphics Mode |
Hold Up + A + B + C + 3 during game play.
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