Pearl Harbor: Zero Hour Cheats (PC)

At the mission selection screen, click on the airplane shadow on the right side of the
screen to unlock an extra level and three additional airplanes including the Raptor and
UFO.

After you complete level ten, go to the mission select screen, look to the right of the
screen, and there will be a tiny airplane. Click on it and there will be a sound to
confirm the code. Now you have access to three new aircraft, including the U.F.O., the
F-22 Raptor, and the Kikka, a Japenese plane. You will also be able to unlock mission 11,
a bonus mission.