The story is fine (or at least better than 5 or infinite for sure), but the game itself...urgh.... The art style and general look of the (former) covenant races look kinda murkey and noisy, the look and feel of everything is just off and the prometheans just flat out SUCK to fight. The only things I think I can actually even remember about that campaign are the setpiece parts where you're flying/driving something or whatever. The missions mostly blur together and aren't fun to run like Halo 1 or 3, or even some missions of 2.