Over G Fighters
F-15C Eagle in scenario mode:
Successfully finish sub-mission 5 in area 4.
Unlock F/A-18 Hornet:
Use in the scenario mode, win sub-mission seven in area
two and it will be added to your stock of playable fighters.
Unlock F-16C:
Win sub-mission 4 in area 2.
Unlock Mig-29G:
Win Sub-mission 10 in Area 4.