Select any level:
Press the following button combination, during the opening sequence:
Up, C-Down, Left, C-Right, Down, C-Up, Right, C-Left, L, R, Z.
If the code is accepted, you should ehar a sound.
Unlock secret F-15 with pilot Mao-Mao:
When you see the "Press Start" text at the opening screen, hit
C-Left, C-Down, C-Right, C-Up, C-Left, C-Right, C-Down.
Unlock Secret pliot #1 - Spanky:
Finish all bonus missions
Unlock secret pilot #2 and F15J:
Hit C-left, C-down, C-right, C-up, C-left, C-right, C-down
at the main menu.
Change plane color in main game practice or boss attack modes.
Hit R at the plane selection screen
Change plane color in death match mode:
While selecting one of the 4 default planes, hold R.
Unlock bonus missions:
Finish the following tasks to unlock new bonus mission:
Air Docking: Reach very high score.
Shuttle Defense: Finish fast all the levels before the "Desert" level.
Goliath Defense: Finish the 1st two bonus stages.
Space: Finish all standard missions and "Air Docking", "Shuttle Defense",
and "Goliath Defense" missions before reaching the "Ice Cave" stage.
Finish the "Ice Cave" stage to unlock the "Space" stage.
Unlock all enemy planes in death-match mode
Complete each of all 6 levels during game play.
Unlimited credits:
Before reaching one credit remaining, reset the game.
The game will resume with the same ammount of credits that were
available when the current stage was started. Submitted by Cronn
