SECURITY-class Mjolnir

The Fifth Unknown Armor (dubbed Marathon) is a set of UNSC Armor. It is set to be an Armor Permutation in Halo 3.

Characteristics

 * It is aesthetically inspired by the armor of the protagonist from the Marathon Game Series, the precursor to Halo.
 * It features a large visor.

Trivia

 * It is strongly suspected that to get this armor you must view all Terminals in the Halo 3 Campaign or get the Marathon Man Achievement