FOTUS-class Mjolnir

"Tested in the rough and tumble streets of downtown Kirkland, Washington."

- FOTUS armory description

The MJOLNIR Powered Assault Armor/FOTUS is a variant of the MJOLNIR Powered Assault Armor (GEN2) utilized by SPARTAN-IV supersoldiers. It appears to be based on Forerunner technology, with the helmet resembling the head of a Promethean Knight.

Halo 4
Unlock: This armor was a pre-order bonus with the Halo 4 Limited Edition Console.
 * Description: Tested in the rough and tumble streets of downtown Kirkland, Washington.

Halo 5: Guardians
Unlock: Pre-order bonus with the Halo 5 Guardians Limited Edition Console or Ultra Rare REQ card. Available Skins: Chillrose and Synchronize Chillrose Unlock: Legendary REQ card Synchronize Unlock: Legendary REQ card
 * Helmet description: The FOTUS helmet's torque-node extension represents a breakthrough in replicating Forerunner "baffler" sensor-distortion systems.
 * Armor description: Hand-crafted from the finest locally-sourced materials and repurposed Forerunner technology, FOTUS-class powered assault armor has proven invaluable in Seattle's corporate shadow-wars.

Behind the scenes

 * The FOTUS armor is presented as a metafictional joke. The acronym supposedly stands for "Fist of the Unicorn(s)", which was referenced as a band made up of the crew members of the in Halo: Combat Evolved Anniversary. In the in-game description, the armor is said to have been developed by 343 Industries tested in Kirkland, Washington, which is 343 Industries' hometown. The gauntlets are designed to defend against cougar attacks in the "Land of Kirk", while the FOTUS greaves earned high marks during coffee runs on rainy days. The prominent spike on top of the helmet is a reference to 343 Industries' running unicorn gag. While the FOTUS armor is presumably canon, the Armory's descriptions of the suit's components are very tongue-in-cheek and obviously not meant to be taken seriously. Presumably, the armor was reverse-engineered from Forerunner technology like the latter-released Prefect armor, possibly from Trevelyan. The flavor text for Halo 5s suit heavily supports this theory.

Trivia

 * The "corporate shadow-wars" mentioned in Halo 5's FOTUS chest may be a reference to the RPG game "Shadowrun", set in a futuristic Seattle run by mega-corporations
 * The FOTUS body armor is also used for the Deadeye armor in Halo 5: Guardians.

List of appearances

 * Halo 4
 * Halo: Escalation
 * Halo 5: Guardians