Ninja Gaiden (Game Gear)

CheatingDome.com

Invincibility

Enter NODIE as your password.

Various Cheat Passwords

At the Title Screen and when the text Press Start Button is displayed, press the 1 button 16 times and then press Start. This will allow you to enter one of the following passwords.

EffectPassword
Act 1: AssaultLEGND
Act 2: SmugglingNINJA
Act 3: SkyscraperGIDEN
Act 4: CounterattackDRGON
Act 5SWORD
Infinite ForceMFREE
Pause and press 1 to turn off hitsLOVER
TimeHURRY
View CreditsMONTY
View EndingAKUSX