One secret Tecmo let slip is certain to get Ninja Gaiden fans pumped for Sigma. Early on in Ninja Gaiden, Ryu's village is being attacked by the evil Doku. A beautiful CG cut-scene shows Ryu battle against Doku and lose badly. In Ninja Gaiden Sigma that CG cut-scene is gone. It's no longer necessary -- because now you get to fight that battle!
 
This is just an example of the many twists that awaits those who have already played Ninja Gaiden. Of course, those new to the series can still enjoy the "ultimate" Ninja Gaiden experience. Though, more than likely, they'll be too busy getting their ass handed to them to appreciate the experience. I simply can't wait to start playing Ninja Gaiden again. I can't believe I'm even typing that, but yes, Ninja Gaiden has me hooked once more.