I just wanted to tell you all that this epic game is really okay for 12 and 11+ kids. I play this game on my xbox sometimes and it always seems to get more fun. Common sense media is over-doing it again.
Violence: The good thing about this game is that with violence you can choose between 3-5 in violence or 4-5 in violence. The reason is that blood may be turned off. There are sword and dagger battles including bows, throwing knives and the occasional turret. Again, common sense media is telling fibs. The cut scenes showing 'Disturbing slo-mo finishing moves', are really not that bad. Luckily, they can be skipped. With blood on, when you kill an enemy, you see a small cloud of unrealistic blood spurt out which almost immediately disappears. Really nothing to get worked up about. With blood off, the violence is the same as Lord of the Rings. If you are allowed to watch LOTR, you should be allowed to play this game. Even with blood, this should be T-rated.
Sexual content: Mild-Moderate. Occasional sexual dialogue is used (in Italian) and prostitutes roam the streets in tight fitting and low cut (but not very revealing) clothes. At the start of the game a cut-scene shows Ezio and his girlfriend about to make love. No nudity is shown, the sex is implied and the cut scene is short and can be skipped.\
Ten year old's see worse in kids shows. If you are allowed to watch the 'naughty' scenes in james bond, the sexual stuff is fine.
Language: Cazzo, fortify and merda are used. These, luckily are only italian and you only see it translated if you have the english dialogue on.
Ezio fights are ruthless lord who kills many people. In a way, this message can be used against bullys. Ezio fight's for what is right and does not kill civilians.
All in all, this game is apropiate for 12+, iffy for 10-11 and definitely not for 9-.
Hope this helped, good-bye