Use your favourite features in-game with our Desktop App

Marathon Sentinel Guide - Stats, Traits, Abilities and Cores

Sentinel is a Runner Shell in Marathon. This shell specializes in area control and trapping enemies. If you like to set up ambushes or make sure your back is always covered, consider playing this Runner.

Below, you will find an overview of this Shell, and after they release, we'll add more details about their compatible cores, best Sentinel builds and loadouts and preferred weapons.

Updated on June 3, 2026

Overview

The Sentinel is the perfect for locking down space and making sure that a potential fight in the area is in your favor.

Making their debut in Season 2, they will be the first new Runner added since the launch of Marathon.

We're still pre-Season 2, so check back later for more info. In the meantime, you can find their abilities and passives below.

Abilities and Traits

Defender System
Prime Ability
Deploy a defensive platform that harmlessly neutralizes incoming explosives. You and your allies also gain increased weapon stability and reload speed when standing near the device. And as always, bear in mind that it’s got a limited number of projectiles to fire! Be sure to keep a steady eye out.

Defender System

Prime Ability

Deploy a defensive platform that harmlessly neutralizes incoming explosives. You and your allies also gain increased weapon stability and reload speed when standing near the device. And as always, bear in mind that it’s got a limited number of projectiles to fire! Be sure to keep a steady eye out.

Snare Mine
Tactical Ability
Toss a proximity-triggered mine which detonates into several Immobilizing submunitions when enemies get too close.

Snare Mine

Tactical Ability

Toss a proximity-triggered mine which detonates into several Immobilizing submunitions when enemies get too close.

Prey Tracker
Trait
Activate motion tracking systems in your HUD that allow you to see moving enemies on radar within a conical zone in front of you.

Prey Tracker

Trait

Activate motion tracking systems in your HUD that allow you to see moving enemies on radar within a conical zone in front of you.

Castle Doctrine
Passive
You ready and reload SMGs, Pistols, and Shotguns more quickly based on the number of nearby hostiles. When you take splash damage, your Hardware, Firewall, and Self-Repair Speed are increased for a short time.