Shooting Down Rate option
Set the game to 13 ships in the configuration screen. Then, successfully complete the game in arcade or extra mode to unlock the Shooting Down Rate option in the configuration screen. When enabled, the game will display the number enemies destroyed during game play.

Extra credits (Japanese version)
Repeatedly tap [Select] at the title screen to set the total credits to nine.

Free play mode
Hold [L1] + [L2] + [R1] + [R2] and press [Start] when the phrase "Press Start" appears at the opening screen. While still holding [L1] + [L2] + [R1] + [R2] press [Up]x7, [Down], [Up]x4, [Start]. The phrase "Limiter released" will be spoken to confirm correct code entry. Enter the configuration screen and turn off the credit limit to enable free play mode. Alternatively, play the game a total of two hundred times.

Level select
Successfully complete the combat mode game under arcade mode.

Thirteen ships
Successfully complete the combat mode game under extra mode. This option can be used to fly a prototype ship with no hyper laser or special attacks.