A-10
Finish all the surface attack objectives at the Aero Meet.

AV-8B Harrier Jump Jet
Finish the VTOL training releases.

A-7 Corsair
Finish Air To Ground #4 at the Aero Meet.

A-7E U.S. Navy colors
Finish all the twenty carrier landings.

Apache Longbow
Finish the combat training.

C-1
Finish the the maneuver objectives at the Aero Meet.

Cobra
Finish the helicopter training.

Blue Impulse F-86 fighter
Collect the Blue Impulse squadron icon in free flight mode on the island level.

Blue Impulse T2 trainer
Collect the Blue Impulse squadron icon under the suspension bridge in free flight mode on the bay level.

F-14B Test Bed
Finish the reconnaissance mission 2.

F-15 Aggressor 1
Achieve a total of 50 aerial kills.

F-104J fighter
Fly at Mach 2.0 or faster. Note: Try getting to an extremely high altitude and go into a dive.

F-105 drone
Fly over 50,000 feet in training mode.

F-15 Aggressor 2
Achieve a total of 100 aerial kills.

F-15 Aggressor 3
Achieve a total of 150 aerial kills.

F-15 Aggressor 4
Achieve a total of 200 aerial kills.

F-15 Aggressor 5
Achieve a total of 250 kills.

F-15 Aggressor 6
Achieve a total of 300 aerial kills.

F-15 Aggressor 7
Achieve a total of 350 aerial kills.

F-2A support fighter
Finish the ACM maneuver objectives.

F-2B
Finish the fifty scrambles.

F-15C
Finish the the ACM objectives at the Aero Meet.

F-15J
Finish the ten scrambles.

F-4E Phantom
Shoot down the F-4E Phantom in scramble mode after being instructed to by the control tower.

F-86
Accumulate one hour in training mode.

FA-18 Hornet
Finish the the carrier landing training releases.

Oh-6
Finish the helicopter training.

Su-25
Shoot down the SU-25 in scramble mode only if instructed by the control tower.

US-1A Search and Rescue Amphibian Plane
To unlock this plane, complete the Scramble mission requiring you to locate the Marine US-1A that has gone down at sea.

More frequent scrambles
Increase the DEFCON level in the options screen, then enter and exit various menu screens several times.

Mig-21
The Mig-21 can be unlocked in the scramble missions. When you see it, shoot it down.

Mirage 2000C
The Mirage 2000C can be unlocked in the scramble missions. When you see it, shoot it down.

Su-27 (Camouflage) fighter
Finish the reconnaissance mission 3.