Complete the indicated task in Campaign mode to unlock the corresponding armor part in Multi-player mode.

Spartan Security Shoulders: Earn 250 Gamerscore points.

Spartan Security Head: Earn 1,000 Gamerscore points.

Spartan Scout Shoulders: Earn the "We're in for Some Chop" achievement.

Spartan Scout Head: Earn the "Used Car Salesman" achievement.

Spartan Scout Body: Earn the "Too Close to the Sun" achievement.

Spartan Rogue Head: Earn the "Spartan Officer" achievement.

Spartan ODST Head: Earn the "Spartan Graduate" achievement.

Spartan Mark V Head: Earn the "UNSC Spartan" achievement.

Spartan EVA Shoulders: Complete "The Ark" under the Normal or higher difficulty.

Spartan EVA Head: Complete Campaign mode under the Normal or higher difficulty.

Spartan EVA Body: Complete "Tsavo Highway" under the Normal or higher difficulty.

Spartan EOD Shoulders: Complete "The Ark" under the Legendary difficulty.

Spartan EOD Head: Complete Campaign mode under the Legendary difficulty.

Spartan EOD Body: Complete "Tsavo Highway" under the Legendary difficulty.

Hayabusa Shoulders: Collect nine hidden skulls.

Hayabusa Helmet: Collect thirteen hidden skulls.

Hayabusa Chest: Collect six hidden skulls.

Elite Flight Shoulders: Complete "The Ark" under the Heroic or higher difficulty.

Elite Flight Head: Complete Campaign mode under the Heroic difficulty.

Elite Flight Body: Complete "Tsavo Highway" under the Heroic or Legendary difficulty.

Elite Commando Shoulders: Earn the "Killing Frenzy" achievement.

Elite Commando Head: Earn the "Overkill" achievement.

Elite Commando Body: Earn the "Triple Kill" achievement.

Elite Ascetic Shoulders: Earn the "Overkill" achievement.

Elite Ascetic Head: Earn the "Steppin' Razor" achievement.

Elite Ascetic Body: Earn the "Up Close and Personal" achievement.