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troperville

Banned In China: The second Xbox game was not released in Germany and Australia because of� well, you know. That's one the reasons the gore was slightly toned down in the PS3 remake.
Disowned Adaptation: Itagaki did not like Ninja Gaiden Sigma, going as far as to refuse to sign copies of it. This probably has something to do with the fact that he wasn't involved with this particular version of the game (since, objectively, it's not very different from Black). However, he did admit that it gave PS3 owners a shot at the game. And all of Sigma's new gameplay elements were kept in Ninja Gaiden II in the end.
Dueling Games: Ninja Gaiden 3: Razor's Edge came out in January 2013 in Europe, just a month before another action game featuring a super-ninja who dismembers his way through a super-equipped military force. It's mostly a coincidence though, as Atsushi Inaba denies any inspiration from Ninja Gaiden (even calling the third episode an "unsavable crappy game").
Hey, It's That Voice!:
- Hayabusa (Xbox) = Arthas
- Hayabusa (360) = Young Ocelot & Spider-Man
- Hayabusa (NG3) = Yuri Lowell, Kanji Tatsumi, Snow Villiers and Vincent Brooks.
  - Hayabusa (Japanese) = Schwarz Bruder and Bartholomew Kuma.
- Rachel = Tara Strong. Bubbles, Raven, Omi, Ben Tennyson & Sari &... just see the frakking IMDB page
  - She's even crazier in Japanese. Sailor Mars, Sumire Kanzaki, Emi Ogasawara, Unipuma, the list goes on and on...
- Sonia = Saya
- Alexei = Travis Touchdown
- Volf = Jorgen von Strangle
- Zedonius = Orochimaru
  - And ironically, he is the Third Hokage in the Japanese version.
- The Regent of the Mask will make this world know Pain!
- Cliff Higgins (Japanese) = Balthier, Sanji (Coincidentially, a minor character in the game has the same name), Pip Bernadotte...
Name's the Same:
- Ryuken is the Japanese name for Ryu's Dragon Sword. It's also the name of the late 63rd successor of Hokuto Shinken.
- Jashin is the name of the Demon in the Original Trilogy. It can also be the cult of which Hidan is a former member.
- Anyone noticed that Irene Lew's alias - Sonia - is the Allied codename for the Mitsubishi Ki-51 bomber?
- There's Jay's Bar, in which Ryu fights the Barbarian in the Original Trilogy, and J's Bar, a bar in Raccoon City in which 8 unlucky souls find themselves caught in the outbreak.
No Export for You: The Original Video Animation was never licensed to outside Japan, the only way to watch it is through fansubbing.
Role Reprisal: English-wise, Kasumi is once again voiced by her DOA5 voice actress Lauren Landa. Averted with Ayane, who retains Janice Kawaye from NG2
Word Of God: According to this interview, the folks at Tecmo were quite unsure on how to translate the video game's title ("Ninja Ryūkenden", which means "Ninja�Dragon Sword Legend") for the foreign players, so they opted for Rule Of Cool even if it didn't make much sense.