The following aircraft become available options by going to the 'Hanger' screen and entering the corresponding code.
Unlock A-12 Avenger 2:
Hold L2 and press Square, L1, Square, R1, Triangle, Square.
Unlock F-18 HARV:
Hold L2 and press L1, Triangle, L1, Triangle, L1, Square.
Unlock FB-22 Strike Raptor:
Hold L2 and press R1, Square, R1, Square, R1, Triangle.
Unlock Saab-35 Draken and XA-20 Razorback:
Register an account at Ubisoft.com. When you have done this go to 'Extras at the 'Main' menu and select the 'Exclusive Content' option. Sign in with your Ubisoft.com account and you will be able to download the Saab-35 Draken and XA-20 Razorback aircraft.
Added by: Sanzano Mar 10th 2009, ID#1472