The lights are on
But you have to think. Halo ODST didn't have any Halos in them, nor did Halo: Reach. You never set foot on one in any of those games, yet it went under the same banner, because that is what people use to recognize the series. If Bungie didn't name Halo ODST the way it had, then what would they have named it? Same with Reach. we recognize them as a Halo game, because of the Halo in their names, yet, all we use is the number or part of the name, so it doesn't really matter.