Konami Classics Series: Arcade Hits
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Gradius: Powered up ship
Select "Gradius" at the game selection screen, then press Up(2), Down(2), Left, Right, Left, Right, B, A at the title screen. A sound will confirm correct code entry. Press Start during game play to give your ship all power-ups except for speed. Note: This can only be done once.
Strategy guides from GameFAQs