Air Combat Cheats

When starting or continuing a game from the title screen, hold down R1 & Circle while the CD is being accessed (You'll see the words 'Now Loading' & flying CD's in the background) While the CD's are flying around, you can enter one of the following codes. If you get it right a representative icon will appear at the bottom left of the flying CD screen -

Undecorated Planes:
Up, Down, Left, Right, Up, Down, Left, Right, R1.

Undecorated Wingman:
Hold R1 & press Start 10 times.

?:
Left, Right, Left, Right, Down, Up, Down, Up, Circle, Circle, Triangle, Triangle, Triangle.

Hidden Game:
Up, Down, Left, Right.

Super Credits:
Press Circle, Triangle, Triangle, Triangle, Circle, Triangle, Circle, Triangle, Circle + Triangle, then hold Circle + Triangle. Start the game & you have 999,999,000 credits.