This game seriously just blows... There's nothing ninja about the rediculously broken and overall shallow gameplay!!!
Anyway, the real problem here lies in the gameplay. Seriously, where does it start? When do I get to play? A majority of it is a little cinematics that require you to hit a certain button at a certain time. Miss the button? Guess what? You have to start the entire sequence over again!! I wish developers would get out of this nasty habit! If I want me to jump from rooftop to rooftop give me the ability to do so and get out of my way! Don't tell me to hit a button and just WATCH it happen! That's not playing a game!!! If its a cinematic I want to watch that. If its a game I want to play that. Lets not get the two mixed up, ok? Aside from the horrendous quick-time events the actually hacking and slashing is terrible. Its basically just a button masher with no real skill involved whatsoever. There's no real ninja action here at all. You want ninja? Go play through Ninja Gaiden again and leave this crap on the shelf at Wal-mart.
Oh, yeah the story.... What story? Don't get me started. It's pretty bland and hard to follow at the same time. Mostly cause its so bland and there's a lot of space between narrative and not much is explained at all. I really felt no need to continue. It just didn't feel important anymore. The gameplay definately didn't do anything to help the matter, but I've always felt on these next-gen games that it should be the story's responsibility to keep us interested. There's nothing interesting about a goofy-looking cyber ninja and his mission to... what exactly? BLAH!!!!!
Don't waste your money. Rent this if you really must see for yourself.