It's a good thing that Microsoft decided to bring From Software's Tenchu Senran to North America (now known as Tenchu Z). The video game is actually one of the more popular series in Japan because of its background story which is a mix of themes from feudal Japan and Japanese mythology. This is not to mention that the series was actually one of the first ninja games that introduced stealth mode.
Speaking of which, you might want to pay attention to Tenchu Z's Impersonation power-up feature. Ninjas, as we are all aware of, are excellent when it comes to concealing themselves in the shadows. However, it feels like the Impersonation feature is much cooler as it allows your character to "disappear" even though that character is in broad daylight.