Aircraft Names
Mission 1: Hawk
Mission 3: F-14D
Mission 4: F-4G
Mission 6: MIR-2000D
Mission 10: EA-6B
Mission 15: X-29A
Mission 16A: Mig-31M
Mission 16B: EA-18G
Mission 17: FB-22
Mission 18: E-2A
Mission 23: Mig-21-93
Mission 25: YA-10B
Mission 26: Rafale B
Mission 27: Su-37
Mission 27+: Mig-1.44

Unlockable: Falkin
Unlock Falkin by destroying the hangers on mission 11a 11b 12a 12b 16a 16b and 27.

Song decision
During one of the early stages of the campaign mode, Chopper will ask you about a song. Your next mission will depend on your answer ("Yes" or "No"). Also, at the end of the stage in which Edge gets rescued, Chopper will again ask you about the same song. Again, your "Yes" or "No" answer will decide which stage is next.

Unlockable: Medals
Play Campaign Mode or Free Mission Mode to unlock these medals. Destroy 5 enemy planes with the machine gun: Bronze Shooter Medal Get 'S' Ranks on every mission on Normal: Bronze Wing Medal When aiding allies in Missions 16A or 16B don’t let more than 3 die: Desert Eagle Medal
Destroy 200 enemy targets: Bronze Ace Medal
Destroy 500 enemy targets: Silver Ace Medal
Destroy 1000 enemy targets: Gold Ace Medal
Down 50 enemy planes with the machine gun: Gold Shooter Medal
Earn 'S' Ranks on all 32 missions on expert: Gold Wing Medal
Kill all 16 named planes in 2nd play-through on Normal or harder: Grand Falcon Medal
Down 10 enemies who get a missile lock on your wingman: Guardian Medal
Protect all 8 armored tanks on ground: Lightning Hammer Medal
Get Perfect from AWACS in all 6 landings and 2 refueling stages: Needle's Eye Medal
Down 15 enemy planes with machine gun fire from your aircraft: Silver Shooter Medal
Earn 'S' Ranks on all 32 missions on Hard: Silver Wing Medal

Falken
Get the missing parts from missions 12a, 12b, 16a, 16b, and 27a to unlock the Falken. You must destroy the hangar of each mission. For mission 12a, follow the river north, then go east at the fork in the river. You must be close for the hangar to show appear on radar. For mission 12b, after taking out the 4 radar sites, destroy enough targets and the hangar will show up near the smokestacks. The one in mission 16a is between the field HQ and the airfield. Mission 16b has it west of the river, between the airfield and oil refinery (south of the north-most river). The part on mission 27 is very close to the gun tower, in front of the tunnel.

Unlockable: Music Player
If you're a music person, you will like this: After you win the game, regardless of difficulty level, you can listen to background music from the Campaign mode.
And when you beat Arcade Mode, music from the levels of Arcade will be added to the Music Player.

Easy Win Against Sinfaxie Or Hrymfaxie
Use the A-18C, F-2A, Raffle-M, or F-35C. When you go against the Sinfaxie play the level till the Ark Bird shoots it while it’s under water, then when it is on the surface use the plains special weapon which should be the LASM (Long Rang Air to Surface Missiles) and lock onto the Sinfaxie Not the Launcher or any of the SAMs or AA Guns.
When you go against the Hrymfaxie do not use the LASM until after you've damaged the Hrymfaxie and it surfaces to launch its ballistic missiles at allied ground troops.

X-02
Get all the other aircraft except for the Falken to unlock the X-02.

PS2 Cheats for Ace Combat 5: The Unsung War

Ace Combat 5: The Unsung War cheat codes

Ace Combat 5: The Unsung War cheats