Air Force Delta

Special options:
Successfully complete all twenty missions under the normal difficulty setting to unlock a "Special" selection on the options menu. The new options allow unlimited missiles and the HUD display to be removed.

Bonus fighters:
Successfully complete all twenty missions to unlock the following fighters: Sea Harrier, AV-8B Harrier II, F/A-18C Hornet, F-15E Strike Eagle, Su-27B Flanker, and Su-34 Platypus. Successfully complete the game under the hard difficulty setting to unlock the EE Lighting. Successfully complete the game under the normal difficulty setting to unlock the MiG-1.44 MFI. Successfully complete the game under the easy difficulty setting to unlock the S-37 Berkut.
Information in this section was contributed by Vitaly Zhitar.

Successfully complete the following missions to unlock the corresponding fighter.

A-10 Thunderbolt II: Mission 7
EF2000 Typhoon: Mission 12
F-117A Nighthawk (Stealth): Mission 9
F-14D Tomcat: Mission 8
F-15S/MT Active: Mission 9
F-16 Fighting Falcon: Mission 4
F-20 Tigershark: Mission 3
F-22 Raptor (Stealth): Mission 15
F-4E Phantom II: Mission 2
F/A-18E Super Hornet: Mission 5
JAS 39 Gripen: Mission 10
JSF X-32 (Stealth): Mission 16
Kfir C.7: Mission 1
MiG-21 Fishbed: Mission 1
MiG-29 Fulcrum: Mission 4
MiG-31 Foxhound: Mission 3
Mirage 2000: Mission 2
Rafale: Mission 11
Su-37 Flanker: Mission 13
Tornado F3: Mission 6
YF-23 Blackwidow (Stealth): Mission 14

Bonus money:
Use guns instead of missiles to shoot down an airborne target to double the reward money.

Full replay screen:
Hold X + Y during a replay to remove the text from the screen.

Pass through objects:
Pause game play before your plane hits an object. Press B + Y to change camera angles. Resume game play to have your plane pass through the object.
Information in this section was contributed by parodius128.