My theroy:Well, many people today consider the lower rating for age a game has, the worse it is. Which is why Super Smash Bros series is T, when it really isn't that bad.Halo isn't as bad either. The worst is the Flood, and that's it. I mean, you kill aliens. You don't spear them, rip out ther guts and stuff, do you? You simply shoot them, unless you have an energy sword. And if you ave that, all it does is go through them and come out. Not much blood. IF I were to rate Reach and ODST, they would be T, but the ones with the Flood... eh, barely M. In fact, my friend had Fall Of Reach, and in the back it showed an ad for Combat Evolved. IT was rated T. So yeah, Halo is more of a borderline thing. [/rant]