Infinite Health
At title screen, quickly press up, up, up, down, down, down, a, b, a, b, select, start. If not fast enough code won't work. If you did it right, the game will make a chime. Now, press right, left, right, left, b, a. A word will come up saying INVINCIBLE.
Added by: CheatFreak
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Ninja Gaiden II: The Dark Sword of Chaos
Tips and Tricks