Halo 3, amazing, yet not...
Firstly gameplay.
Campaign 10/10 - Very well designed, fun, and challenging on harder difficulties.
Online/Forge - 7/10 Reason being, most people do the same old, same old tactics and tricks, and too many people cheat, so rankinng up at liutenent or that area is slightly hard.
Forge is great with enough people though.
One more thing, so many people have cheated and boosted to the rank of general, and they mostly suck.
Music - 10/10 superb
Achievements 9/10 - There is one i don't agree with, two for one, double kill with 1 laser from a spartan laser, it's so difficult, i strugggled to get 1k.
I was aiming at some guy, and a guy on a ghost tried to splatter him, and i got the achievement, 5GS!.
Very addictive though.