As of Marathon 2 and Marathon Infinity, the Mjolnir Mark IV Cyborg is the current model of Battleroid.

It appears that Battleroids were built using Jjaro technology found by colonists and explorers. This would explain why, during Marathon Infinity, the Cyborg begins having surreal mind trips; this is likely due to the Jjaro technology used in Battleroid production.


  • In Bungie's Halo series, supersoldiers from the SPARTAN Program, such as Master Chief, wear MJOLNIR Powered Assault Armor. The first version that was deployed was the Mark IV, followed by the Marks V, VI, and VII. The M Variant of the Mark VI armor is designed to resemble the Cyborg's helmet and sports a Marathon emblem on the forehead.