Extra Credits - Press X, A, Left Shift,
Right Shift, left, then hold down Left Shift and press X, C, Z, A, right,
right. You should hear a sound if done correctly.
Easy and Harder Game - At the options menu Hold down X, then press Z, C,
Left Shift, B, left, Right Shift, Left Shift. You should hear a sound if
done correctly.
Turbo Fire - At the games options screen hold B and press Y, right,
left, X, Z, Left shift, Right shift
Nine continues:- Press X, A, L, R, Left, then hold L and press X, C, Z,
A, Right(2) at the game start screen. A sound will confirm correct code
entry.
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