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Released on March 27, 1987 in Japan.
TIPS AND TRICKS
Music box: As the ending cutscene depicting a Spy returning to the submarine plays, hold at least one A and one B button on any controller. If done right, rather than presenting the results screen, the Music Box will appear. To select from one of 16 tracks, press Up / Down while A, B or Start will play the selected track. Press A on the second controller to reset music and pause/unpause. Pressing Select will exit the Music Box and show the Results screen.