EOD-class Mjolnir

The Mark VI MJOLNIR Powered Assault Armor/E variant, also known as the E.O.D. armor, is a type of United Nations Space Command body armor.

Introduction
The E.O.D. (Explosive Ordnance Disposal) is a variant of the standard Mark VI MJOLNIR powered battle armor. It is an armor permutation in Halo 3 multiplayer. Bungie has confirmed all of the armor permutations have no effect on gameplay.

Development and History
Head: The Mjolnir/EOD variant was created at UNSC facilites on Chi Ceti 4. The helmet was designed to channel the pressure wave around the user's head, significantly reducing the likelihood of decapitation.

Shoulders: Developed at the UNSC Damascus Materials Testing Facility on Chi Ceti 4, the Mjolnir/EOD variant was designed specifically to reduce the number of grabbing edges on the armor, decreasing the likelihood of dismemberment.

Body: This variant was designed specifically to protect Spartans during operations involving the handling of explosive ordnance [e.g., clearing/planting land mines, demolishing enemy structures/material].

Helmet Characteristics
The Helmet is mostly squared off with two separate eye pieces like a pair of goggles rather than the typical wide visors of the MJOLNIR armors. It then has a single plate over the nose and mouth and a pair of rectangular objects along each cheek, assumed to be re-breathers.

Shoulder Characteristics
The Shoulder plates bear a great resemblance to those of Space Marines from Warhammer 40,000, though much smaller along the covering of the joint between the shoulder and the upper arm. It is more squared off, lacks the trim, and has a small light in it.

Chest Characteristics
The E.O.D. chest armor strikes a resemblance to the Mark V chest.(Halo:Combat Evolved armor.)

Unlock

 * Head: Complete the Halo 3 Campaign on Legendary.
 * Shoulders: Complete the The Ark on Legendary.
 * Body: Complete Tsavo Highway on Legendary.

Trivia

 * The armor seems to have been heavily inspired by that of the Helghast armor from the Playstation 2 game, Killzone. Bungie has joked that they are arch enemies with Guerrilla (The developer of Killzone), but the two developers apparently get along well (ironic, considering "Killzone" was meant to be a "Halo Killer" for the PlayStation 2).
 * Many believe the armor looks similar to a stormtrooper's armor from the Star Wars francise.