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Pet project of Cascade's CEO, a former ODST. A small number of HELLJUMPER prototypes have entered Spartan service under a research partnership between the UNSC and Cascade Stronghold Technology.
— Armor Description
Mjolnir Powered Assault Armor/Helljumper is a variant of Mjolnir [GEN2] used by SPARTAN-IVs. A project of the former ODST turned Cascade Stronghold Technology CEO started development with the company's partnership with the UNSC.
- Halo 5: Guardians (First appearance)