Halo 4 unlockable armors

For the love of Cortana!

Knight Helmet
Win the “White Knight Assassination” achievement

Platinum Mark VI Helmet
Win the “Wake up, John” achievement

UNSC Infinity Hoodie
Earn the achievement “Not Some Recruit Anymore”

Mark VI Armor
Legendary Visor
117 Emblem
Finish the script “Legendary” in difficulty