Heatseeker - SR71 Blackbird

The Big One SR-71 Blackbird Weapon Pack:
Successfully complete the Ace bonus objective for the final mission Mission 4.5: Final Count Down to unlock the SR-71 Blackbird's fourth weapon pack. This weapon pack includes the game's super weapon, the A-SLAMR. The A-SLAMR does not recharge once fired so use it wisely. Note: The SR-71 Blackbird and "The Big One" weapon pack can both be unlocked at the same time if playing on the Ace difficulty setting. Just complete both of the required bonus objectives to unlock the SR-71 and "The Big One" weapon pack together instead of separately.

Aircraft:
Complete the bonus objective in the indicated mission under the listed difficulty setting to unlock the corresponding aircraft.

F-15 Eagle V1: Mission 1.3 under the Rookie difficulty.
F-15 Eagle V2: Mission 2.3 under the Pilot difficulty.
F-16 Falcon V1: Mission 1.3 under the Rookie difficulty.
F-16 Falcon V2: Mission 2.1 under the Pilot difficulty.
M-27 Flogger V2: Mission 1.2 under the Pilot difficulty.
MiG-27 Flogger: Mission 1.1 under the Ace difficulty.
MiG-29 Fulcrum V2: Mission 2.3 under the Rookie difficulty.
MiG-31 Foxhound V1: Mission 1.3 under the Ace difficulty.
MiG-31 Foxhound V2: Mission 2.1 under the Ace difficulty.
T-45 GOSHAWK: Mission 1.1 under the Rookie difficulty.
Yak-141 Freestyle: Mission 1.2 under the Ace difficulty.

Weapon Packs:
Complete the bonus objective in the indicated mission under the listed difficulty setting to unlock the corresponding aircraft.

Air Attack for MiG-27 Flogger V2: Mission 1.1 under the Pilot difficulty.
Circuit Breaker for F-117 Nighthawk: Mission 2.2 under the Ace difficulty.
Circuit Breaker for F-22 Raptor V2: Mission 2.4 under the Ace difficulty.
Cluster Bomber for F-16 Falcon V2: Mission 1.3 under the Pilot difficulty.
Long Ranger for F-15 Eagle V2: Mission 2.1 under the Rookie difficulty.
Multirole for SU-27 Flanker V2: Mission 2.3 under the Ace difficulty.
Multirole for Mig-31 Foxhound V2: Mission 1.2 under the Rookie difficulty.
Naval Fighter for MiG-29 Fulcrum V3: Mission 2.4 under the Rookie difficulty.
Rocket Attack for MiG-29 Fulcrum V2: Mission 1.3 under the Rookie difficulty.