All tracks
and Tripods:
At the main menu, highlight the "Tripod Select" option. Then, hold X + Y and
press Up, Left, Down, Right(2), Up, Down, Right.
Codes:
MISSI - All power-ups are triple missiles
TURBO - All power-ups are turbo rams
AUTOM - Turbo ram auto-pilot
GHOST - Invisible Tripods
HUND - CPU controlled bonus Tripods
RETRO - Alternate sound effects
JOHNM - Unknown
