First, you have to buy the base E.V.A. helmet, which you unlock at Major. After that, you can purchase a special accesory for it, which is Emile's paint on his helmet. It costs 60,000 credits, though, so start saving up.
To get Emiles helmet in the armory you must first be in the "Major" ranking. Once unlocked you will be able to purchase it with the credits you have earned during gameplay.
You can get it by ranking up online.
Simple: you must be rank commander or higher. Emiles helmet is a helmet of its own.
For EVA u hav to be a major but Emile's helmet with da skull on it u hav to be i think a colonel
It should be standard on the right security shoulder.
You have to be a general, and you can only get the knife on the right shoulder
Do a bulltrue in matchmaking to unlock the avatar award.
He is wearing the Commando helmet that you unlock by ranking up.
5h1t
Commander
Inheritor, the last rank in the game. The last helmet, the Haunted Helmet, is the Pilot Helmet with a skull on it. To unlock it, you must reach the rank Inheritor, and own every BASE helmet in the game.
You have to be an warrant officer in halo reach to unlock the helmet you also have to go to halowaypoint and unlock the armor.
By getting to Leiutenant Colonel rank you unlock the CQC shouloders to buy in the Armory.
You need to be a brigadier and have 300,000 credits