This game is awesome. Story, graphics, etc. However extremely difficult and frustrating. It took my brother and I months to finish, and we only finished it because of the reputation the game has. I hate the saving system, because if you save when too little life you are screwing yourself. I would recommend using each slot incrementally. Also the enemies could rock you one minute and the next minute you take them out, so enemy difficult is very inconsistent. Little minion guys shouldn't be able to completely kill you, they should just hurt you a little. Play this game with the strategy guide. You will get stuck and it helps to have all the upgrades.
This game starts off hard even though you are playing it on normal. If you loved the first 3 Ninja Gaidens on the NES, then you'll love the xbox version. This game is for hard core gamers. Its one of the most challenging games that i played in a while. Sorry regular gamers, this game is only for hard core gamers. Its that hard to beat!!!