A great game for anyone who is interested in ninjas. Definitely for the more mature young to mid teen because of the fact that there are different ways to kill your enemies (but hey, ninjas were assassins). I actually feel that Rikimaru, the main character, is a good role model - if you respect the silent and powerful type.
I played this at my daycare when i was like 9, And come on, why should blood be a descriptor, you scrape your knee every week? Best game ever, but Tenchu 1 2 and 3 are WAYYYYYYYY better.
I got this for my 11 year old and found it was too violent I waited a year and found at that age they could handle the violence. This game is fine for anyone 12 and up.