Great sequel to a great game
As I am a big fan of the Ninja Gaiden series (played it on XBox, XBox 360 and PS3), my opinion of the game might be considered biased.
But what a game. There is an obvious improvement in the graphics, gameplay, weaponry, and playability.
My favorite thing is the addition of gruesome de-limbing of fiends. This makes for the kill to be a lot more satisfying.
The game has also improved with the addition of the new characters (with the option of Co-op play) but turns out that the all other playable characters are girls. Like the previous game, the girls aren't as resilient or agile as Ryu himself and don't possess the wide range of weaponry. But it has to be mentioned, that the variety of skills of the other characters are a big improvement from the previous game.
Either way, it was a fantastic game (2 thumbs waaay up), as was expected.
Can't wait for some serious DLC (fingers crossed).