Fast weapon recharge:
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At the title screen,
press X, B, Y, A, X, B, Y, A, X, B, Y, A, X, B, Y
to have your weapons charge very fast.
Bonus characters:
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Successfully complete the game on the easy difficulty
setting to unlock a guy with a spread rocket as a special
weapon. Successfully complete the game on the normal
difficulty setting to unlock a girl with a hyper laser.
