Good Buy but better weekend rental!
Many may compare this game to Ninja Gaiden but the two are very different. Ninja Gaiden being a much more serious game and Ninja blade have no seriousness to it at all. The puzzles (being few and far between) are elementary and not really meant to bewilder the player but add something extra to the levels and break up the monotony of killing the parasites( who look alot like zombies).
Ninja Blade would be a good buy when on sale but a better rental that you keep for a week ( since thats the time it will take you to beat it). Depth to games is good at times but so is uncomplicated action and that is exactly what Ninja Blade delivers.