For those who do not know about the RSAC ratings.

It came before the ESRB and was for PC games. It had a picture of a bomb for violence, a hand covering an eye for nudity and sex and an exclamation point for language. It had a thermometer going from 1 to 4 and thats how you could tell how much of what content was in the game. I think an age rating being added would of made this work better then it did.

Have that type of content rating with the ESRB ratings and you will have a pretty good system. :)