Cheat mode:
Press Select to highlight the "Sound" option at the title screen, then press Run to enter that function. To activate the cheat functions highlight the indicated number, press II, then repeat for the remaining numbers. A sound will confirm correct code entry. Some cheat functions take effect immediately, others will activate at the title screen or when game play is started.

View ending credits
Play sounds 02, 04, 05, 02, 09, 04.

No fruit mode
Play sounds 00, 03, 05, 10, 00, 03, 05, 10.

Twenty lives
Play sounds 03, 07, 03, 05, 01, 08, 08, 01, 01, 04.

Four screen mode
Play sounds 06, 04, 08, 06, 04, 08, 06, 04, 08.

Black and white four screen mode
Play sounds 01, 01, 07, 06, 08, 00, 00, 00.

Black and white mode
Play sounds 01, 04, 05, 06, 05, 06, 05, 06, 05, 06, 05, 06.

Return to normal mode
Play sounds 00, 00, 00, 00, 00, 00.

Level select
Play sounds 08, 08, 01, 01, 08, 02, 04, 07.

Weapon power-up
Play sounds 08, 04, 01, 03, 07, 05, 06, 04.