Here are some cheats and tips for the game Gem X.
Level Password
B EARTHIAN
C KENICHI
D INOKUMA
E BURAI
F BADMAN
G NETWORK
H YOKOHAMA
I EXACT
J X68000
K TURRICAN
L REDMOON
M CAMPAIGN
N MAGAMAN
O SYVALION
P FMTOWNS
Q CHIERIE
R GAMERION
S ZAWAS
T ROBOTECH
U POPULOUS