When you complete Campaign mode on the indicated difficulty settings the corresponding SP colour schemes will become available options.

Unlock F-22 Raptor SP Colour Scheme:
Complete Campaign mode on Normal difficulty.

Unlock X-02 Wyvern SP Colour Scheme:
Complete Campaign mode on Hard difficulty.

Unlock ADFX-01 SP Colour Scheme:
Complete Campaign mode on Expert difficulty.

Unlock ADF-01 SP Colour Scheme:
Complete Campaign mode on Ace difficulty.

Unlock Free Mission Mode:
Complete Campaign mode once.

Unlock Ace Difficulty:
Beat the game in 'Expert' difficulty setting.

Unlock Typhoon and SP Colour Scheme:
In the Mercenary Ace style shoot down the Rot Squadron in mission 3.

Expert Difficulty mode is ulocked by successfully beating Hard Difficulty mode.

Unlock F-22A:
Beat the game once in any difficulty setting.

Unlock X-02:
Beat the game twice in any difficulty setting but with a different Ace style from your first game play.

Unlock ADF-01:
Obtain ALL Supreme Ace medals.

Unlock ADFX-01:
Beat campaign mode on any difficulty with ALL 3 different Ace styles.

Unlock Music Player:
Clear Campaign once in any difficulty setting with any Ace style.

Unlock Scene Viewer:
Clear Campaign once in any difficulty setting with any Ace style.


Unlocking Medals
Clear the game with the arrow in that ace zone to unlock the stadard Ace medal and to unlock the Supreme Ace mdeal be as far into the zone as possible.

Unlock Guardian Medal:
Clear Mission 5

Unlock Deliverance Bell Medal:
Clear Mssion 6

Unlock Broken Sword Medal:
Clear Mission 9

Unlock Marksman Medal:
Destroy 5 enemy aircraft with only guns

Unlock Sharpshooter Medal:
Destroy 15 enemy aircraft with only guns

Unlock Bronze Ace Medal:
Destroy 200 enemies

Unlock Silver Ace Medal:
Destroy 500 enemies

Unlock Gold Ace Medal:
Destroy 1000 enemies

Unlock Soldier Ace Medal:
Clear game as Soldier

Unlock Knight Ace Medal:
Clear game as Knight

Unlock Mercaenary Ace Medal:
Clear game as Mercenary

Unlock Supreme Knight Medal:
Clear game with the arrow at the right end of the Style Meter

Unlock Supreme Mercenary Medal:
Clear game with the arrow at the far left end of the Style Meter

Unlock Supreme Soldier Medal:
Clear game with arrow in the center of the Style Meter