SPARTAN-IV program

The SPARTAN-IV Program is the fourth iteration of the SPARTAN supersoldier program. It was conceived by Admiral Margaret Parangosky, the Commander-in-Chief of the Office of Naval Intelligence. The SPARTAN-IV Program was originally to be headed by SPARTAN-III lead Colonel James Ackerson, with SPARTAN-II project lead Dr. Catherine Halsey to be reassigned as Ackerson's subordinate. Though Ackerson was killed following the Battle of Mare Erythraeum, ONI continued the program without him.

Like the original ORION Project, the SPARTAN-IV Program would utilize only consenting adult volunteers. The remaining SPARTAN-IIIs were offered to be integrated into the SPARTAN-IV Program. At least some SPARTAN-IVs were active by 2553. Some of them were assigned to the before it was launched.

Gameplay
SPARTAN-IV supersoldiers will be featured in Halo 4 as customizable multiplayer characters. Unlike in previous games, there will be an in-universe explanation for why SPARTAN-IVs are fighting one another.

List of appearances

 * Halo: Glasslands
 * Halo 4