I-Ninja is a video game developed by Argonaut Games and published by Namco. It was released for the PC, PlayStation 2, Xbox and GameCube. A Game Boy Advance version of the game was announced, then later cancelled. The game was advertised with the tagline "No one's taller than the last man standing."
The game starts with a Ninja in training (simply named Ninja), who comes to rescue his Sensei, (simply named Sensei) from the Ranx sent by Ninja's arch-nemesis, Emperor O-Dor. Ninja saves Sensei by defeating the Ranx. Then, a creature comes to attack Ninja which he deals with easily. The creature then spits out a Rage Stone which Ninja touches and goes into a fit of rage and accidentally kills Sensei. Sensei comes back as a ghost and tells Ninja that there are more Rage Stones and with their power, he can defeat O-Dor. Sensei then sends Ninja to find the second Rage Stone in Robot Beach.
Ninja arrives at Bomb Bay and saves it from many of the dangers the Ranx have set up. Ninja then finds a submarine inside a giant bomb and fights the mechanical fish, Ventis for the next Rage Stone. Ninja then meets the guardian of Bomb Bay, Aria. If anybody saves Aria from something, she always rewards the hero with hugs and kisses, with Ninja being no exception. She then tries to hug and kiss him, while he struggles not to harm her with the rage stone's power. Ninja opens the gate and gets away from Aria, not before calling her a "fish lady" and walking off.
Ninja then enters Mountain Gorge where he saves the Mountains from the new, more powerful Ranx. After saving the mountains, Ninja meets O-Dor's right hand man, Malakai, who can control the elements. Ninja wins the fight and takes a moon-shaped Rage Stone. After a confusing moment of Ninja climbing all over the large stone, trying to use it, a female ninja, Zarola, tells Ninja that that stone was a Teleport Stone which will take him to O-Dor's secret moon base. She also tells him about the last rage stone which can make the dead alive again or make someone immortal, offering Ninja a chance to ressurect Sensei, or become immortal. Then, Zarola sends Ninja off.
Despite the fact that the game ends on a cliff-hanger, no sequel has been announced and it's unlikely that one will ever be made, due to Argonaut Games going out of business in late 2004.