Gem X

Cheat Codes:
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Here are the level codes.
They have to be typed on the main menu.

Level B : EARTHIAN   Level C : KENICHI    Level D : INOKUMA
Level E : BURAI      Level F : BADMAN     Level G : NETWORK
Level H : YOKOHAMA   Level I : EXACT      Level J : X68000
Level K : TURRICAN   Level L : REDMOON    Level M : CAMPAIGN
Level N : MEGAMAN    Level O : SYVALION   Level P : FMTOWNS
Level Q : CHIERIE    Level R : GAMERION   Level S : ZAWAS
Level T : ROBOTECH   Level U : POPULOUS