Cheat mode
Fire and reload the lightgun or controller at a blank
portion of the main menu (or off the screen completely) to spell
out the code words. The number of times [Fire] is pressed
corresponds to a letter in the alphabet, with 1 being the equivalent
of "A" through 26 being the equivalent of "Z".
Press [Reload] to move on to the next letter. .
Master code
Enter "MEBIGCHEAT" as a code. Press [Fire]x13,
[Reload], [Fire]x5, [Reload], [Fire]x2,
[Reload], [Fire]x9, [Reload], [Fire]x7,
[Reload], [Fire]x3, [Reload], [Fire]x8,
[Reload], [Fire]x5, [Reload], [Fire], [Reload],
[Fire](20), [Reload] at the main menu. The screen will
flash to confirm correct code entry
Arcade mode
Enter "BLAM" as a code. Press [Fire]x2,
[Reload], [Fire]x12, [Reload], [Fire], [Reload],
[Fire]x13, [Reload] at the main menu. The screen will
flash to confirm correct code entry The "Arcade Mode"
option will now be unlocked in the extras menu. Alternately, successfully
complete the game.
Country challenges
Enter "ABROAD" as a code. Press [Fire],
[Reload], [Fire]x2, [Reload], [Fire](18),
[Reload], [Fire]x15, [Reload], [Fire], [Reload],
[Fire]x4, [Reload] at the main menu.
Mighty Joe Jupiter mini-games
Enter "MIGHTIER" as a code. Press [Fire]x13,
[Reload], [Fire]x9, [Reload], [Fire]x7,
[Reload], [Fire]x8, [Reload], [Fire](20),
[Reload], [Fire]x9, [Reload], [Fire]x5,
[Reload], [Fire](18), [Reload] at the main menu.
Alternately, successfully complete all Mighty levels in cadet
training mode to unlock the "Mighty Joe Jupiter Trilogy"
option in Mighty Joe Jupiter mode. Complete the easy levels in
cadet training mode to unlock Mighty Joe Jupiter Episode 2. Complete
the normal levels in cadet training mode to unlock Mighty Joe
Jupiter Episode 3.
Jukebox and music test
Enter "LETSBOOGIE" as a code. Press [Fire]x12,
[Reload], [Fire]x5, [Reload], [Fire](20),
[Reload], [Fire](19), [Reload], [Fire]x15,
[Reload], [Fire]x15, [Reload], [Fire]x7,
[Reload], [Fire]x9, [Reload] at the main menu.
Alternately, successfully complete all episodes in the Mighty
Joe Jupiter Trilogy to unlock the "Music Jukebox" option
at the Options screen.
Ending bonuses
Successfully complete the game to unlock the "Arcade
Mode" option at the extra menu and the "Mirror Mode"
option at the arcade mode menu.
Machine gun
Successfully complete the game in arcade mode using
the pistol. Start a new game in arcade mode to use the machine
gun.
Cane gun
Successfully complete the game in arcade mode using
the machine gun. Start a new game in arcade mode to use the cane
gun.
Shotgun
Successfully complete the game in arcade mode using
the cane gun. Start a new game in arcade mode to use the shotgun.
Hyper Arcade mode
Successfully complete the game in arcade mode using
the shotgun to unlock the "Hyper Arcade Mode" option
at the arcade mode menu.