Armor customization (Halo 3)/Elite


	Combat harness
	Chest: Unlocked by default Shoulder: Unlocked by default Helmet: Unlocked by default

	Assault harness
	Chest: Unlocked by default Shoulder: Unlocked by default Helmet: Unlocked by default

	Flight harness
	Chest: Beat Tsavo Highway (Heroic) Shoulder: Beat The Ark (Heroic) Helmet: Campaign Complete: Heroic


	Ascetic harness
	Chest: Get the Achievement Up Close and Personal Shoulder: Get the Achievement Overkill Helmet: Get the Achievement Steppin' Razor

	Commando harness
	Chest: Get the Achievement Triple Kill Shoulder: Halo 3 Title Updates/Steppin' Razor^[1] Helmet: Get the Achievement Overkill

References

^ Bungie.net: "The longstanding “Elite Commando Shoulders aren’t unlocking with the achievement” bug is being resolved in the auto update. The shoulders weren’t unlocking when the Steppin’ Razor achievement was acquired. In the post-auto update era, the Commando Shoulders will be unlocked for everyone, regardless of the status of the corresponding achievement."