Hints & Tips

F22A
Simply finish arcade mode.

X-02
obtain all the other aircraft but not the Falken to have the X-02 available.

Falken
Obtain the missing parts from missions 12a, 12b, 16a, 16b, and 27a to have the Falken available. You have to destroy the hangar of each mission. For the 12a mission, follow the river north, then make your way east at the fork in the river. You must be near for the hangar to show on radar. For mission 12b, after detroying the four radar sites, destroy an adequate amount of targets and the hangar will show up close to the smokestacks. The one in mission 16a is between the field HQ and the airfield. Mission 16b is west of the river, between the airfield and oil refinery. The part on mission 27 is close to the gun tower, in front of the tunnel.

Song decision
In one of the early stages of the campaign mode, Chopper will ask you about a song. Your next mission depend's on your reply. Also, at the end of the stage in which Edge gets rescued, Chopper will again ask you about the same song. Again, your reply of "Yes" or "No" will decide which stage you do next.