Completed the game on normal difficulty.
Completed the whole game on hard mode.
Complete the game without using the roll back.
100 cumulative kills.
Reached rank of Captain.
Reached rank of Lieutenant Colonel.
Kill all enemies in a dogfight mission.
Destroy all the targets in a strafing mission.
Destroy all air attacking planes in a single bombing mission.
Bomb a truck in a bombing mission.
Been informed that you're an ace!
Land a damaged plane in a dogfight mission.