By the power of truth, I, while living, have conquered the universe.
Campaign: 9/10
Multiplayer: 8/10
Spartan Ops: 6.5/10
The latter took 2/3 weeks to get into swing, the story is fantastic but the missions are so bleh most of the time. Looks like Episode 6-10 will be different, but I shan't be raising my expectations.
Halo 4 earns a solid 8.5/10 for me overall, the biggest let-down is Spops and I think the campaign could have done with a bit of a slower pace at times - another mission alone between Requiem and Forerunner, and setting the Composer mission on Installation 03 as a 2-part mission.
It's so close to greatness, but some things just make it fall short. The broken File Sharing system and lack of campaign theatre (which is supposedly coming later) also let the game down.
Overall, Halo 4 needed a beta because this sure does feel like one.