I have mixed feelings about this game. It's starts off somewhat slow & frustrating. It's like it took the worst of Ninja Gaiden & started you there. But there's lots of value to be had as you'll only find approximately 60-70% of the items by the end. The game is setup for you to go back & unlock new areas but its not mandatory (I appreciate this). It'll take roughly 10 hours to complete. The boss battles are great/ unique. The ending boss is what made this game 4 stars from 3.5 - truly wonderful. For me it's worth it if you like Ninja Gaiden throw back & it's on sale. Take care & blessings!