If it's so massive, why isn't it put on disc like AH? I am worried because what if my power or internet goes out in the middle of downloading!? What would happen to my hard earned MS points (I've been doing heavy duty chore work ) and why spend time downloading it when I can just pop in the disc? What if my 360 broke? It's more likely than my discs breaking, because I never leave discs out or anything. I learned that the hard way after I broke my Halo 2 disc from my dogs trampling it. So...why is it an arcade game!?