Cheat Mode:
     Enter one of the following codes at the main menu to activate the
corresponding effect. Note: Enabling a code will not allow the game to
save your progress.

Cheat Menu:
     Press L1, R2, L2, R3, R1, L3 at the main menu.

Japanese:
     Press Circle, R2, L1, L2, D-pad Left, D-pad Up at the main menu.

All Planes and Missions:
     Press  Right  Analog-stick  Up,  Right  Analog-stick  Down, Right
Analog-stick Left, R2, L1, Right Analog-stick Right at the main menu.

Upgrade Planes:
     Press  L1, Right Analog-stick Left, R2, Right Analog-stick Right,
D-pad Right, D-pad-Down at the main menu.