Shinobi
Sound test:
Hold Select at the title screen until the sound test screen appears.
Level select:
Hold Select after the "Mission Summary" screen. Then, press one of
the following controller combinations when the screen turns black.
Level Mission
1-2 II
1-3 II, II
1-4 II three times
2-1 I
2-2 I, II
2-3 I, II, II
2-4 I, II three times
3-1 I, I
3-2 I, I, II
3-3 I, I, II, II
3-4 I, I, II three times
4-1 I three times
4-2 I three times, II
4-3 I three times, II, II
4-4 I three times, II three times
