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Unlockable: Spartan Armor Permutations
Unlock the following Spartan armor permutations by fulfilling the requirement listed…

• EOD (Body) – Complete Tsavo Highway (on Legendary)
• EOD (Head) – Complete the campaign mode (on Legendary)
• EOD (Shoulders) – Complete The Ark (on Legendary)
• EVA (Body) – Complete Tsavo Highway (on Normal, Heroic, or Legendary)
• EVA (Head) – Complete the campaign mode (on Normal)
• EVA (Shoulders) – Complete The Ark (on Normal, Heroic, or Legendary)
• Mark V (Head) – Get the UNSC Spartan Achievement
• ODST (Head) – Get the Spartan Graduate Achievement
• Rogue (Head) – Get the Spartan Officer Achievement
• Scout (Body) – Get the Too Close to the Sun Achievement
• Scout (Head) – Get the Used Car Salesman Achievement
• Scout (Shoulders) – Get the We’re in for Some Chop Achievement
• Security (Head) – Get 1,000 Gamerscore Points
• Security (Shoulders) – Get 750 Gamerscore Points

Unlock the following Elite armor permutations by fulfilling the requirement listed…

• Ascetic (Body) – Get the Up Close and Personal Achievement
• Ascetic (Head) – Get the Steppin’ Razor Achievement
• Ascetic (Shoulders) – Get the Overkill Achievement
• Commando (Body) – Get the Triple Kill Achievement
• Commando (Head) – Get the Overkill Achievement
• Commando (Shoulders) – Get the Killing Frenzy Achivement
• Flight (Body) – Complete Tsavo Highway (on Heroic or Legendary)
• Flight (Head) – Complete the campaign mode (on Legendary or Heroic)
• Flight (Shoulders) – Complete The Ark (on Heroic or Legendary)