Unlimited weapons, energy, and shields:
Hold Down + 3 + 4 +
6 + 7 at the mission selection screen. A sound will confirm correct code entry.
Bonus lives:
Hold 3 + 6 + 9 + #
at the mission selection screen. A sound will confirm correct code entry. Up to
nine extra lives may be selected.
Level skip:
Hold 2 + 4 + 6 + 7
+ 8 + 9 at the mission selection screen. A sound will confirm correct code
entry.
Switch day and night:
Hold Up + A + B + C
+ 7 during game play.
Alter globe speed and direction:
Hold 4 + 6 at the
mission selection screen.
Alter globe size:
Press Up or Down at
the mission selection screen.
Vector graphics mode:
Hold Up + A + B + C
+ 3 during game play.
Debug mode:
Press Up + A + B +
C + 6 during game play. The top right number indicates the current frame rate.
Bonus missions:
Enter one of the
following codes at the mission selection screen to enable the corresponding
bonus mission.
Level 1 - Hold Up + 2 + 3 + 6.
Level 2 - Hold Down + 2 + 6 + 7 + 8.
Level 3 - Hold Right + 3 + 5 + 6.
Level 4 - Hold Up + 2 + 5 + 8.
Level 5 - Hold Right + 2 + 4 + 5 + 6.
