Aircrafts alternate color schemes
Complete the Trial Missions with all S ratings in order to unlock one of each aircrafts's alternate color schemes (This doesn't work for the X-02)
Unlock Bonus options
Complete all 18 missions, then save the game. You should now have access to the following options: Free Mission, Special Continue, Trial Mission, Scene Viewer, Music Player
Unlock all airplanes plus X-02 Multirole fighter
Complete the game on normal and get an S rank for every mission.
