Rated M for mature.

[Cloven]

Regarding Nudity, Gore/Blood, and Violence, a game must possess the following to receive a rating of 'M'.

The game must contain extended or continuous 'adult themed' content in that:

-Said content must be of a realistic nature with regards to gore and violence (See games like GTA3).
(Note: This is why games like Ratchet & Clank are rated 'E' even though they are combat-oriented).

-Games with nudity must contain a sexual connotation.
(Showing brief nudity in games is not considered Mature until sexually suggestive elements come into play. Simply showing breasts is not suggesting that kids should go have sex.)

Hope this clears a few misconceptions up.