Too Long; Didn't Read
For die-hard Halo fans, playing the Halo campaigns on legendary difficulty is a rite of passage. Halo fans must sanctify every new Halo game through the ritual of a campaign run on legendary. Halo 3 ODST is the easiest game on legendary mode. Halo 5's biggest crime is its bullet sponge enemies that make legendary difficulty artificially more challenging and a slog to play. Halo Combat Evolved is among the most balanced of all the campaigns, and is the most difficult to complete one of the most demanding ones.