F-15 and Mao-Mao:
Press C-Left, C-Down, C-Right,
C-Up, C-Left, C-Right, C-Down when PRESS START
becomes visible on the opening screen. A hidden
F-15 with a female pilot (Mao Mao) can now be accessed.
Level select:
Press Up, C-Down, Left, C-Right,
Down, C-Up, Right, C-Left, L,
R, Z during the opening sequence (before the title screen) when the fighters
are in flight. You will hear a sound if you have entered the code correctly.
Alternate plane color:
Press R at the plane selection screen in main
game, practice or boss attack modes. For death match mode, hold
R while selecting one of the four default planes.
Bonus missions:
Finish one of the tasks below to unlock each bonus mission.
Air Docking: Accumulate a very high score.
Shuttle Defense: Quickly complete all the levels before the "Desert"
level.
Goliath Defense: Finish the first two bonus levels.
Space: Finish all regular missions and "Air
Docking", "Shuttle Defense", and "Goliath
Defense" before reaching the "Ice Cave" level. After finishing the "Ice Cave" level you will unlock
the "Space" level.
F-14 super-attack:
Fire the special weapon followed by a missile and then
chaff while flying the F-14. Five Tomahawks and four heat-seekers
will then be fired.
Spanky:
Locate and finish all bonus missions to
unlock Spanky, the second hidden pilot.
Fly enemy planes in deathmatch mode:
A new enemy plane will be available in deathmatch mode
for each level completed while playing the game. A total of six enemy
planes may be enabled.
Unlimited continues:
Before reaching one credit remaining, reset the game
and continue from the menu that immediately follows the title
screen. The game will resume with the same number of credits that
were available when the current stage was started.
