best level: im going to choose a second best here because we all know the first best is Silent Cartographer. dare i say the second best is...New Alexandria? Actually I think this might be my fourth best here because the sequence of Halo -> Truth and Reconciliation -> Silent Cartographer is truly unfair to compare other levels against

best multiplayer map (you didn't ask but im answering): Valhalla. I think Blood Gulch and Coagulation are iconic but bad to play. Valhalla solves every single one of those problems. it is "the halo multiplayer map" to me

best music: Mjolnir Mix. runner up (and also best "Real Halo Game Song") is One Final Effort (had to go look up the name lol). the halo ce music is really good but i do think hatsune miku really did such a good job in the sequels that they win the bracket

best gun: halo reach's needle rifle. great gunfeel. get three shieldless hits and boom. the perfect sequel to the needler. my runner up here is actually the halo reach dmr. sorry halo ce pistol but bungie really had figured their guns out in reach