Shinobi III: Return of the Ninja Master/Cheats

Cheats
Unlimited Shurikens

In the options menu, set the amount of shurikens to 0. Then set the sounds effect option to Shuriken. Hover back over the Shurikens option and after a few seconds the 0 will turn into an infinity symbol ∞.

6 Button Mode

This cheat enables you to play the game with a 6 Button controller, allowing you to throw shurikens and melee attack seperately. First plug your 6 button controller into slot 1 and have a second controller in slot 2. Highlight Options on the main menu but don't click on it. On Controller 1, hold the Mode button and on Controller 2, hold UP on the D-Pad and the C Button. While holding these buttons down, press Start on controller 1. If done correctly you will be in the "Options" menu, but it will read "Option" at the top of the screen.

Invincibility

Choose BMG selection on the options menu, then, press B to select the following songs in order: He Runs, Japonesque, Shinboi Walk, Sakura, Getufu