Armor permutations is a feature in Halo 3, Halo 3: ODST, and Halo: Reach that allows players customize their multiplayer character's armor to their liking. In Halo 3 and Halo: Reach, this feature allows players to change the armor pieces worn by their multiplayer character. Players also have the option of choosing between being a Spartan or Elite in Halo 2 and Halo 3, whereas Halo: Reach allows full body customization of Elite armor along with Spartan Armor.
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