Here are some cheats and tips for the game 1943 Kai: The Battle Of Midway.
Unlimited bombs:
Pause game play and press I, II, Left, I, II, Up, I, Down, I, II,
Select, Up, Down.
Unlimited ammunition:
Pause game play and press II, Left, II, Up, I, Right, I.
Nine credits:
Enter sound test option and play the following songs (in order): 0, 3,
3, 8, 3, 9, 0, 0, 8, 0.
Unlimited credits:
Enter sound test option and play the following songs (in order): 3, 4,
3, 8, 0, 1, 4, 1, 14, 14.
Maximum HP:
Enter sound test option and play the following songs (in order): 3, 7,
3, 5, 1, 8, 2, 1, 9, 8, 4.
Arcade mode:
Enter sound test option and play the following songs (in order): 7, 7,
7, 7, 9, 3, 10.
Start at second half of game:
Enter sound test option and play the following songs (in order): 1, 6,
0, 10, 5, 2, 10, 3, 8. Game play will begin after powering up with
heavy artillery and speed.
Fast mode:
Enter sound test option and play the following songs (in order): 7, 5,
8, 4, 1, 10, 5, 1, 10, 5, 1, 8.
Slow mode:
Enter sound test option and play the following songs (in order): 0, 0,
0, 0, 0.