Secret Game:-  Load the game and just before the Intro loads (when the Bird Logo appears) press and hold.......R1 and CIRCLE. The screen should now fill with bouncing CD`s, now press UP, DOWN, LEFT, RIGHT and every time the game loads anything, a secret game will appear to keep you amused.

999,999,000 credits:-  At the special CD loading menu, quickly press down, circle,triangle, triangle,triangle,circle, triangle,circle,triangle,then press circle + triangle simultaneously twice and hold both buttons down after the second press. You will see a character from one of Namco's other games appear to confirm the code. 

Now start the game and you have instantly earned an incredible 999,999,000 credits.

Different Color Crafts:-  In 1 Player mode, at the CD loading screen press Up,Down, Left, Right,Up,Down,Left,Right, and hold R1 until a spaceship appears onscreen.  If done correct you should have different colors crafts.

Colorless wingmen:-  Air Combat: At the Special CD menu hold R1 and hit start 10 times Hold The start button after the 10th press, this gives you Colorless wingmen.

EXTRA TEN FIGHTERS:-  Pay through the game on easy mode to the last mission and defeat the boss. Once the mission is completed and the game is over, the credits will appear on the screen. Sit through this until the title screen appears. You should then have "extra 10" in the upper-right corner of the screen. Now go through the options to the plane select and notice that there are several more fighters to choose from!

GAMESHARK CODES:

UNLIMITED FUEL = 800EEBOO 8FFF
UNLIMITED MISSILES = 800EEB0C 0040
UNLIMITED GUNS = 300EEB10 0027
INVINCIBLE = 800EEA2C 00C8