Here are some cheats and tips for the game Ikari Warriors.
Continue game play:
Press A, B(2), A at the game over screen
after losing during one of the first three levels of the game.
Level select:
Quickly press Up, Down, A(2), B,
Left, Right, A, B, Up, A,
Down, Right(2), Left, B, Up,
Left, A, Right, B, Left, Right,
A, Left, Up, A, Down, A,
Right, Left, A, Start at the title
screen. The phrase “Stage 1” will appear next to the
airplane landing screen to confirm correct code entry. Press
A or B to change the starting level.
Double tank:
Position both players on a tank and press A on both
controllers.
Double helicopter:
Position both players on a helicopter and press A +
B on both controllers.