EOD-class Mjolnir

The Mark VI MJOLNIR Powered Assault Armor/EOD variant, more commonly known as Explosive Ordnance Disposal Armor, and abbreviated as EOD Armor, is a type of United Nations Space Command body armor.

Introduction
The EOD (Explosive Ordinance 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 that no armor permutation has an effect on gameplay.

Development and History
The Mjolnir/EOD variant was created at UNSC Damascus Materials Testing Facility facility on Chi Ceti 4. The helmet was designed to channel the pressure wave around the user's head, significantly reducing the likelihood of decapitation. The Mjolnir/EOD variant was designed specifically to reduce the number of grabbing edges on the armor, decreasing the likelihood of dismemberment and 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 also 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 EOD chest looks to be like a bulkier version of the Mark VI armor varient. This is most likely to increase survivability of frontal explosions or attacks. Interestingly, the chest piece also 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.
 * This is one of the hardest armour permutations to unlock because of the fact that you must play 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).
 * The pre-release renders of the helmet resembled the helmets worn by the Space Marines from the Warhammer 40,000 universe.
 * The helmet bears striking resemblance to the helmet the soldiers wore in the Bungie game "Oni". The main difference being the Halo version features a mouth cover.
 * The Helmet bears resemblence to the COGs' helmets from Gears Of War.
 * The Helmet's face also have a resemblance to Goillas.