I thoroughly enjoyed this game. This is the first Ninja Gaiden game I played since I was 8 years old. I used the motion controller which you can only use on 'Hero' and must switch on before the game starts. while playing this game I felt like I was starring in a movie. The cinematic scenes include sharp graphics and for each move that Ryu does, you press a button or swing the controller. Using the motion controller is a great experience. Although the game is a little 'easier' it still is pretty hard to fight the 100s of enemies and the bosses - you can get tired, no joke. The system responds to swinging side to side vs. swinging up and down, hard swings vs. light swings; and holding the controller back like you're about to strike causes Ryu to do a special attack on every enemy in the area - its pretty cool. You get new swords throughout the game and that improves the volume and depth of attacks.
You can't just wildly swing though, you have to block, slide, throw shuriken, etc. I imagine the nav controller as the sheath and the motion controller as the sword; and that helps me engage in fluid combat.
The game is very straight foward. Most of the time you're running at enemies and tanks head on, other times you're sneaking up on people, whether walking or climbing walls. There are no items to collect.
One thing I love is that you get to see a more personal side of Ryu Haybusa. You see how he is emotionally and mentally on and off the field of combat and how it affects him throughout the game. It is seriously like taking control of an anime movie and seeing how it unfolds.
It is somewhat predictable but it didn't diminish it at all in my mind. It was fun trying to figure out who the 'Big Bad' (the evil doer behind the whole plot) is. The guy is just a tough SOB ninja and you have the privledge of taking control of him; anyone who thinks its too easy should put it on hard and then see how they feel. This game is DEFINITELY worth playing.