Complete the game under the easy difficulty level. Allow the credits to complete after the boss is defeated. The phrase extra 10 will appear on the top right corner of the title screen after it reappears. Use the plane start option to access the the extra fighters
Enter cheat mode and press up, left, down, right. Begin the game, then return to the title screen. A mini game lasting approximately six seconds will begin while the main game lodes again. The ace combat icon can be controlled with left or L2, and circle or R2. Pres R1 to switch between 3 control option. Destroy as meny ships and missiles as possible before before the small bird walk from the left to the right.
Enter cheat mode and press up, down, left, right, up, down, left, right, then hold R1 at the bouncing CD screen. for two player mode, replace the controller options with left, right, left, right, down, up, down, up, circle, circle, triangle, triangle, then press and hold triangle again
Enter cheat mode and press down, circle, triangle, triangle, triangle, circle, triangle, circle, triangle, and circle + triangle then press and hold circle+triangle agen at the bouncing cd screen. Begin the game and then enter the fighter selection screen. The amount of credits available will now be set to the maximum
Press R1 + circle when the bird logo is displayed Before the now loading screen. A black screen whith the phrase now loading and bouncing CD's in the background will confirm that cheat mode is active. Each time a code is succesfully enterd, a small namco caracter will appear in the lower left corner