The marauder will automatically raise the shield to counter incoming fire, but will not respond to indirect attacks grenades or rockets detonated near him can cause a falter that lowers his shield and leaves him briefly open to another shot. It acts similarly to the shield wielded by some soldiers however, it is unaffected by the plasma rifle and thus cannot be overloaded. The marauder is protected from all damage by a shield of Argent energy, which glows red-orange and bears their Sentinel logo, the same one emblazoned on their belts.

It leaves a brief trail of Argent energy when it dashes, making its new location immediately obvious. Its running speed is close to the Slayer's, and it makes frequent use of a similar dash ability as the run-up to an attack, both to evade the player's attacks and to flank behind the player. At long range, the marauder throws its axe, sending out a wave of Argent energy. At mid-range, the marauder performs a lunging swing (which can be either vertical or horizontal) with its axe, telegraphed by its eyes flashing green. When the player is at close range, the marauder uses its super shotgun the weapon is drawn and fired almost instantly, making it unlikely that the player will be able to dash out of the way.

Every marauder wields a super shotgun and an Argent double-bladed battle axe. They keep a garland of skulls around their left thighs, indicating that they may act as headhunters. They have bluish-gray skin and wear green suits of armor which closely resemble the Praetor suit, presumably corrupted versions of the armor they once wore as Night Sentinels. Each marauder is a humanoid demon with a skull-like head bearing large, prominent horns.

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