All The Ships...
	Cheat Codes...
	The Ending (USA/Europe Version...
	The Real Last Boss (Japanese V...

To unlock all the ships, go to the machine's Test Menu. Enter "Game Settings", change everything to 9 on "Shooter1 Coin/Credits" and "Shooter2 Coin/Credits". Also turn On "Free Play". Now exit that menu and go to "I/O Test". Hold the Test and Service button and repeatedly press the 2nd player's Start button. If done right, you should see the "Days of Operation" counter increasing. Set it to over 140. Exit that menu and reset the "Shooter1 Coin/Credits", "Shooter2 Coin/Credits" and "Free Play" if you wish. You can now exit the Test Menu altogether and reboot the machine. If done right, all the ships will be selectable.

At the fighter select screen do the following.

Effect	Code
Aegis II-c	Hold Fire, Press Start, Move to Aegis IV, Hold Up, Press Fire.
Blue Javelin	Hold Fire, Press Start, Move to Random, Hold Down, Press Fire.
Dark Sword	Hold Fire, Press Start, Move to Random, Press Fire.
Fairy	Hold Fire and Bomb, Press Start, Move to Random, Hold Down-Right, Press Fire.
Judge Spear	Press Start, Move to Random, Hold Down, Press Start.
Miclus	Hold Fire, Press Start, Move to Random, Hold Down-Right, Press Fire.
Raiden mk-II	Press Start, Move to Random, Hold Right, Press Start.
Raiden mk-II Beta	Hold Fire, Press Start, Move to Random, Hold Right, Press Fire.
Slave	Hold Fire and Bomb, Press Start, Move to any plane/Random, Press Fire and Bomb.

Finish the game twice to unlock the ending.

To reach the real last boss, you need to achieve a 100% Target Destroy Rate on levels 3 and 6. If done right, you'll face the true last boss (a black ship) after destroying the fake last boss (a base). In the non-Japanese versions you'll always face the true last boss regardless of your performance.