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--Unlockable: New Game SPTo unlock a new game feature (called New Game SP), simply complete the game once on a difficulty setting of your choice.
--Unlockable: Expert DifficultyTo unlock expert difficulty, complete the game once.
--Unlockable: PlanesYou can unlock each plane in the game, save the two most powerful, by clearing the game once through on Normal difficulty. The two strongest craft are thereafter unlocked by completing the game on Hard and Expert difficulties.
Below are a list of planes that can be unlocked in Normal difficulty. Simply defeat the mission listed for the corresponding planes.
Default - F-16C Fighting Falcon
Mission 4 - A-10-2 Thunderbolt / Mirage 2000
Mission 5 - Panavia Tornado \
Mission 6 - F-14D Tomcat / F-2A / FA-18 Super Hornet
Mission 8 - Sukhoi 33 Flanker
Mission 9 - F-15E Strike Eagle / Rafale M
Mission 10 - F-117 Nighthawk
Mission 12 - EU Typhoon
Mission 13 - F22A Raptor / Sukhoi 47 Berkut
--Unlockable: New Paint SchemesHere's how you unlock new paint schemes. Complete the game once through on Normal mode, and unlock the Estovokian scheme. A third paint scheme can be unlocked by shooting down the enemy aces found only in Expert and Ace difficulty modes.
--Unlockable: SP GamerPictureTo unlock SP GamerPicture, beat the game once through on Ace Difficulty.
--Unlockable: CFA 44 NosferatuTo purchase the CFA 44 Nosferatu Fighter, you must first beat the game on Hard difficulty (or higher). After beating the game on that setting, you can purchase the plane for $230,000
--Unlockable: Third/Final Paint Scheme for CFA-44I have the final color scheme for the CFA-44. I unlocked it by getting the following medals: Bronze Ace, Silver Ace, Gold Ace, all Marksman medals, Needle's Eye, Night Owl, Raging Falcon, Blazing Griffin, Guardian, Legendary Ace, Bronze Star, Silver Star, and Gold Star medals.
I picked up the Blazing Griffin medal last and that's when it gave me the paint scheme. Since I did have the Legendary Ace medal I cannot confirm that it is either necessary or unnecessary that you have it. My safest guess would be that you need a total of 17 medals regardless of which ones you have.
I also had all of the operation medals as well as all of the assault records filled. And all of the other plains and weapons unlocked and purchased. Good luck!
--Unlockable: Ace DifficultyTo unlock Ace Difficulty, beat the game once through on Expert Difficulty.
