PIONEER-class Mjolnir

PIONEER-class Mjolnir is a variant of the MJOLNIR Powered Assault Armor (GEN2).

Development history
The Pioneer variant was manufactured and produced by Acheron Security. It was tested at Gdynia, Acheron Fossae on Mars.

Some tests was done on Anvil Station in 2555. Around that time Acheron Security staked the reputation of their Military Sensors Division on the Pioneer's advanced threat detection system. The Pioneer testbed was also the first of a new series of post-War reconnaissance and combat expedition Mjolnir variants.

The Pioneer was developed as a result of the UEG's pioneer initiative in order to claim new territories for colonization. The Pioneer variant has been used in assisting in the security and protection of over two dozen field teams and science detachment. The armor was first used during the first exploration efforts of Installation 03. Pioneer-class armor is equipped by Spartans providing protection to ONI expeditionary groups. It is intended primarily for reconnaissance operations in unknown or hostile environments.

Halo 4
Unlock: Achieve Spartan Rank PR-4 Available skins: ADPT(Adept)
 * Description: Used by security escort during the first exploration efforts on Installation 03.
 * The CORE skin is available by achieving Spartan Rank PR-9

Halo 5: Guardians
Unlock: Uncommon REQ pack
 * Helmet description: The sensor fidelity and high-bandwidth storage capacity in the PIONEER helmet makes it ideal for detailed environment scans used in War Games and intelligence analysis scene reconstructions.
 * Body description: The PIONEER is a reconnaissance and combat expedition Mjolnir variant, pairing advanced environmental sensors with Acheron's latest threat detection systems.

List of appearances

 * Halo 4
 * Halo 5: Guardians
 * Halo Online