ACHILLES-class Mjolnir

MJOLNIR Powered Assault Armor/ACHILLES is a variant of the Mjolnir [GEN2] armor.

Halo 5: Guardians
Unlock: Achieve level 3 in all of the Spartan Company Mastery Commendations' Kill Commendations for the armor, and achieve level 5 in all of the Spartan Company Mastery Commendations' Kill Commendations for the helmet.
 * Helmet description: The AI that lies within the branching lattice of the ACHILLES' neural interface gnaws at the mind of its partner. No Spartan can stand alone against its urgings of unbridled excess, but through bonds of loyalty and duty they can be held at bay.
 * Body description: Only Spartans who have mastered themselves, bound their wrath and passion within a shell of hyperdense steel fueled by starfire, are granted access to the ACHILLES. Lesser warriors will lose themselves in a storm of blood.

Trivia
When the update Cartographer's Gift arrived, a glitch happened where this armor was unofficially revealed in Halo 5 and Waypoints REQ card lists. The armor appeared in Halo 5's armory as a green box. This was swiftly removed by 343i.

List of appearances

 * Halo 5: Guardians