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
This armor type was created at the UNSC facilities of Chi Ceti 4, and specifically designed to channel the pressure wave around the wearer's head. This is to decrease the possibility of decapitation.

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 rebreathers. The helmet is reminiscent of the COG standard-issue helmet from "Gears of War" as well as the helmets/gasmasks of Killzone.

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 1 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 armour seems to have been heavily inspired by that of the Helghast armour from the Playstation 2 game, Killzone. Bungie has joked that they are arch enemies with Guerilla (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).
 * It should also be noted that the helmet somewhat resembles that of the Imperial Stormtrooper from the Star Wars series.