Ace Combat 6: fires of liberation

The following can be unlocked by completing various tasks in the game.
Unlockable: How to unlock:

SP New Game: Complete campaign once on any difficulty setting.

CFA 44 Nosferatu Fighter: Beat the game on Hard difficulty. It will appear in your hangar, purchase it for $229,500.

Unlock Expert Difficulty: Beat the game once.

Scene Viewer: Beat the game once.

Music Player: Beat the game once.