Space Invaders
Cheat mode:
Press Start at the title screen, then press B, A, Select(2), B, A,
Left(2). A cheat menu with level select and permanent shield will
be unlocked.
Invincibility in Classic mode:
Press Start at the title screen, then press Left, A, Select(2),
Up(2).
Maniacal difficulty:
Press Start at the title screen, then press B, A, Down, B, A,
Down, B, Up, Select.
Classic mode:
Enter CLSS 1281 999DBM as a password.
Level Name Password
2 Earth WWYX TC2N QW79VY
3 Mars ?WZ4 VCLN 4W81V?
4 Jupiter RSSN 3QJ7 8?GJMC
5 Saturn WSPZ MSO8 N?H8NF
6 Uranus CV1? QWKG J3X8R5
7 Neptune HV27 RW1G N3YOR7
8 Pluto MV7H RCLH 3ZSR9
9 Alien Homeworld RV8R RC2H X3?RJC
