OK, Halo 3 has Blood and gore. You might not think that but shoot your friendlies and find out I mean it's just blood splatters and if you shoot them against the wall there will be blood on the wall. Then you got the alien blood which to me looks like Gatorade. Then there is violence Do I have to say anything there. Language, & last but not least partial nudity. They have that in Halo 3 because of Cortana I mean she is all a hologram but think about it she is partly nude. That would be all. Blood and Gore, strong violence, language, and partial nudity all that is M. If you got any Questions plez tell me right here