Get the highest score in all Campaign missions to unlock Ace Of Aces.
All campaign missions and planes
At the main menu, hold L1 + R1 and quickly press Square, L2, R2, Triangle(2), R2, L2, Square to unlock all campaign missions and planes.
All missions, Medals and planes
At the main menu, hold L2 + R2 and press Square, L1, R1, Triangle, Triangle, R1, L1, Square.
Desert Recon
After successfully taking the first three pictures of the ships, continue to the desert. Watch your radio signal when it picks up. You should have the two bars to be all fullly green. When that happens, you can pick up the camp on the radar.
Dogfighting
When in a dogfight, hold in the brake to sharpen your turns. This allows you to get the edge on a turning dogfight when trying to outmaneuver your opponent. This is best used with the more maneuverable planes like the Gladiator, Zero, Both Hurricanes, and the N1K Shinden. Getting skilled with this will allow you to become a better dogfighter.
God Mode
Pause the game, hold L2 and press Square, Triangle, Triangle, Square. Release L2, hold R2 and press Triangle, Square, Square, Triangle. Re-enter the code to disable it.
Increased Damage
Pause the game, hold L2 and press L1, L1, R1. Release L2, hold R2 and press R1, R1, L1. Re-enter the code to disable it.
Increased damage by weapons
Pause the game, then hold L1 and quickly press L2(2), R2. Then, hold R1 and quickly press R2(2), L2. Repeat the code to disable its effect.
Invincibility
Pause the game, then hold L1 and quickly press Square, Triangle(2), Square. Then, hold R1 and quickly press Triangle, Square(2), Triangle. Repeat the code to disable its effect.
Vampire MK1
Unlock the Vampire during game play. Then, hold L2 + R2 and press L1(2), Triangle(2), Square, L1 at the main menu.