Platinum Mark VI Helmet
Unlock the "Wake Up, John" achievement [Complete the Campaign on Normal or harder] to earn this award.
Promethean Knight Helmet
Unlock the "Knight in White Assassination" achievement [Assassinate a Knight in any Spartan Ops mission] to earn this award.
Unlock the "Not Some Recruit Anymore" achievement [Rank up your Spartan-IV to SR-5] to earn this award.
- Cowboy Out.