Best game in DS
The overall difficulty isn't tremendously challenging, and it's certainly not as hard to finish as the console Ninja Gaiden games. You can plow through Ninja Gaiden Dragon Sword in six to seven hours of game time, which, after a few inevitable trial-and-error deaths, boils down to about eight or nine hours. Beyond that, you'll unlock a much more vicious difficulty level, and you have the ability to get your scores ranked on the Ninja Gaiden Nintendo Wi-Fi Connection server. And there's a few hidden treats you can snag along the way, but to get them all you'll definitely have to play through the game at least twice.