They dress in black, they run across rooftops, they do backflips all the time.
Ninjas are the ultimate lifeform. Who else gets to run around and kill people while wearing pajamas? Granted, the laws were a lot more lax back then, but even so... ninjas are awesome.
As such, ninjas often make it into videogames, going right back to the days of The Last Ninja through to Xbox 360 now. With the diesil-powered HD graphics and more memory than an elephant, the potential for games has now gone through the roof. But what are the top ninja games on Xbox 360?