some of the ppl before this made some good justifications in their reason, but i think that it should. Let me tell you why. When you have a franchise that has game that are already rated M it is hard to change the rating in the game without making huge changes in the game itself. it is not always the purple blood, like some one said, that makes the game rated M. The game is also rated M for the content that it has in it. i mean in the third Halo Quintana and Master Chief have some "interesting' feelings for eachother. i am not saying that it is bad for a kid to hear these things but sometimes a kid doesn't NEED to hear or see the blood and dialog that the game has. Master chief's companions often throw out SHIT or something to the effect. Who wants a kid running around saying that. And to top it all off the game would be worse if it was rated teen. They would take out ALL the "purple blood you see" and gore that some with the game. idk about you but those things keep me interested in the game.