Armor customization (Halo 3)/Elite

From Halopedia, the Halo wiki

Elite armor
Armor Helmet Chest Shoulders
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Combat
Unlocked by default Unlocked by default Unlocked by default
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Assault
Unlocked by default Unlocked by default Unlocked by default
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Flight
Complete the entire Halo 3 campaign on Heroic difficulty or higher (Campaign Complete: Heroic) Beat Tsavo Highway on Heroic difficulty or higher Beat The Ark on Heroic difficulty or higher
HTMCC H3 Ascetic Menu Render.png
Ascetic
Unlock the Steppin' Razor achievement Unlock the Up Close and Personal achievement Unlock the Overkill achievement
HTMCC H3 Commando Menu Render.png
Commando
Unlock the Overkill achievement Unlock the Triple Kill achievement