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Marathon Beginner’s Guide: Runner Shells, Factions, and Survival Tips

New to Marathon? Learn how to pick the right Runner Shell, level your Factions, manage your heat and ammo, and actually make it to extraction alive in Bungie's punishing new extraction shooter.

Marathon Beginner's Guide Runner Shells, Factions, and Survival Tips

Bungie’s Marathon launched on March 5, 2026, on PS5, Xbox Series X|S, and PC, and it plays nothing like Destiny. This is a PvPvE extraction shooter where every drop onto Tau Ceti IV is a gamble: you bring gear in, fight AI and rival Runners, and try to extract alive with something to show for it. Lose, and your loadout goes with you.

1. How Marathon Works as an Extraction Shooter

Marathon is NOT a traditional arena shooter. It is a high-stakes extraction game where success relies on restraint, map knowledge, and precise resource management. If you sprint in expecting to outgun every squad, you will bleed out and drop your gear within minutes.

The loop is simple on paper but demanding in practice. You load a loadout from your vault, drop into one of the available zones, fight through UESC AI enemies and other players, the Runner squads, collect loot, complete Faction contracts, and then find an extraction zone to escape.

Every item you bring in is at risk. Every item you extract goes into your stash.

Sabotaging a Relay.

Sabotaging a Relay.

1.1. The Core Loop: Drop, Scavenge, Extract

Each run follows the same fundamental pattern, but the pace and priorities shift depending on how geared you are.

  1. Select your Runner Shell, equip a loadout from your vault, or use a free Sponsored Kit.
  2. Drop into your chosen zone and immediately orient yourself using audio cues and the map.
  3. Scavenge buildings, complete Faction contracts, and engage enemies selectively.
  4. Monitor your ammo and healing supplies throughout the run.
  5. Locate an extraction zone and call for extraction before you run out of resources.

Gear comes and goes. Do not be too precious about it, but learn to use what you have, and it will serve you well.

Activating an Exfil.

1.2. The Heat System

In Marathon, the Heat system replaces the traditional stamina bar entirely. Sprinting, sliding, and utilizing your Runner’s unique abilities generate Heat. If you max out your Heat gauge, your synthetic Shell will overheat, temporarily locking you out of key actions and slowing you to a crawl.

Weather conditions can also affect heat buildup, so it is important to learn when to disengage and cool down. Overheating mid-fight or during an escape can easily cost you the run. Get into the habit of letting your gauge drop between engagements rather than chaining sprints back-to-back across the map.

1.3. Matchmaking Modes and Lobby Types

Before every drop, double-check your matchmaking settings. Getting this wrong early will put you in situations you are not ready for.

  • Solo Only: Matches you against other solo players. The correct setting for beginners running alone.
  • Solo No-Fill: Drops you into a trio lobby as a single player against coordinated squads. Avoid this until you are comfortable in the game.
  • Squad Fill: Pairs you with random teammates to form a full trio. Useful for contract progress since Faction XP is partially shared across your squad.

Rook players can join games already in progress, regardless of lobby type, so expect to encounter them in any queue.

Crew Fill settings.

Crew Fill settings.

2. Runner Shells: Choosing Your Class

One of the first real decisions you make in Marathon is which Runner Shell to deploy. Seven Runner Shells are available at launch: Destroyer, Vandal, Recon, Assassin, Triage, Thief, and Rook. Each Shell has four abilities: a Prime (ultimate), a Tactical, and two passive Traits.

Each Runner Shell is not limited to one fixed playstyle. The same Runner can fulfill different roles depending on the selected build.

Thief Shell.

Thief Shell.

2.1. All Seven Runner Shells

  • Destroyer: A tanky, brute-force Shell. Excels at launching missiles and projecting shields to protect squadmates from incoming fire.
  • Vandal: A highly mobile Shell built around speed and repositioning. Ideal if you come from fast-paced games.
  • Recon: An information-focused Shell. Abilities include locating nearby hostiles, avoiding being tracked, and marking targets.
  • Assassin: A stealth Shell with Active Camo tactical ability. Best for flanking squads and picking off isolated targets.
  • Triage: The dedicated support option, focused on healing and sustaining teammates during prolonged engagements.
  • Thief: A specialist Shell built around acquiring and securing high-value loot under pressure.
  • Rook: A Shell that cannot use gear from the vault. You will instead be given basic items, which can be improved via Faction upgrades. Rook is a scavenger-focused option designed for solo, low-risk runs.
Destroyer Shell.

Destroyer Shell.

2.2. Which Shell to Start With

The best starting tip is to understand what each Runner Shell offers. For example, if you prefer a stealthy approach and want to stalk teams for a flank, Assassin is the best choice for its Active Camo Tactical ability.

For true beginners, Rook is a safe entry point. If you do not have much gear, use a Sponsored Kit or play as Rook and focus your runs on getting gear, earning credits, or stocking up on resources. Once you understand the flow of a run, move to a Shell that matches how you want to play.

Assassin Shell.

Assassin Shell.

3. The Faction System

Factions in Marathon are corporate and ideological organizations that hire players, known as Runners, to complete specific tasks called Contracts. When you complete work for a Faction, you earn reputation points that increase your standing with them.

Higher reputation unlocks better rewards from their Armory, permanent stat boosts for your Runner Shells, and advances story content through special missions.

You can work for all six Factions interchangeably without being locked into just one. Spreading your effort across all six is how you accelerate your overall power floor and recover faster after a bad run.

Gaius from NuCaloric.

Gaius from NuCaloric.

3.1. All Six Factions at Launch

  • CyberAcme (CyAc): Focuses on utility efficiency and practical solutions. Their Armory offers versatile, reliable gear, and their stat bonuses improve overall utility, making your Runner Shell more efficient at general tasks.
  • NuCaloric: Caters to players who love discovering hidden areas and uncovering the map’s secrets. Their contracts involve visiting specific locations, finding rare items, or extracting with discovery-related objectives.
  • MIDA: A more PvE-focused Faction. Contracts lean toward engaging AI enemies and hunting high-value targets on the map.
  • Arachne: A more PvP-focused Faction. Rewards come from engaging and eliminating rival Runner squads.
  • Sekiguchi Genetics: Available at launch in Season 1 alongside the other five.
  • Traxus: The sixth Faction available at launch, offering its own contract and armory progression track.
Factions in Marathon.

Factions in Marathon.

3.2. How to Progress Factions Efficiently

Your priority should be completing the Priority Contracts as each Faction unlocks. These give you a foot in the door to their Armory and let you start purchasing useful gear, as well as access to free kits and full loadouts they offer for credits.

As you progress throughout the season by completing contracts and collecting Faction upgrades, you will be granted access to stronger base stats and better gear in the Armory. Your power floor will rise over time, and recovering from a loss will be easier.

The recommended starting Factions for new players are CyberAcme and NuCaloric, as both reward straightforward in-run behavior.

Welcome to Tau Ceti IV contract.

Welcome to Tau Ceti IV contract.

4. Ammo, Heals, and Resource Management

Resource management separates players who consistently extract from those who bleed out before the exit. If there are two items you will always need more of in Marathon, they are ammunition and healing items.

Even after wiping squads, taking down AI, and looting multiple buildings, you will likely still need both by the time you reach extraction.

Running low on either resource mid-run is one of the fastest ways to lose your entire loadout. Treat your ammo reserves and HP packs as a priority, picking them up every time you clear a room or open a container.

The Vault.

The Vault.

4.1. Building a Reliable Supply

Always bring a few stacks of ammo for each weapon type you have equipped, plus a couple of stacks of HP and shield recharges. This should be enough to last until you find more through looting or killing enemies.

It is also worth noting how Volt weapons work. Volt guns operate more like energy weapons than bullet-fed firearms. The batteries that power them recharge as you move around.

If you reload immediately after firing just a few bursts, you are tossing away the battery and will run out of ammo fast. Hold off on reloading until a battery is genuinely depleted.

4.2. Use Sponsored Kits for Early Runs

Every day, you can collect a free Loadout, dubbed Sponsored Kits in Marathon, which can be acquired through the Armory and added to your vault. During your early runs, you want to scavenge for all kinds of loot, avoid enemy teams, and try to extract as safely as possible.

Sponsored Kits lack good shields, ammo, and medical supplies. Using Sponsored Kits during your early starts in Marathon is fine, though do not become too overreliant on them.

Once you start finding blue-rarity weapons and decent shields in your vault, start bringing real loadouts into runs.

Sponsored Kits.

Sponsored Kits.

5. Cores, Implants, and Weapon Mods

Marathon pushes deep into RPG build territory through its Cores and Implants system. They can fundamentally change how your Shell plays on the field and catch opponents off guard who expect a standard loadout.

Cores physically alter how your Shell’s abilities function. Implants are passive stat boosts that adjust the 13 base stats of your Shell, allowing you to modify your Agility, Self-Repair Speed, or Heat Capacity.

Trophy Hunter Core.

5.1. How to Build Smart Early On

Build balanced loadouts until you understand exactly how the stats interact with your abilities. Over-specializing early, before you know the meta, will leave you with gaping weaknesses that experienced Runners will exploit.

Beginners should experiment with balanced builds rather than over-specializing. Understanding how stats interact with your Runner’s abilities will dramatically improve consistency in combat and survivability.

5.2. Weapon Mods and Attachments

You can install up to 4 mods on your guns, with 8 attachment slots: barrel, generator, muzzle, grip, chip, magazine, optics, and shield. Weapon mods are a direct damage and handling upgrade, and even modest mods on a common weapon can give you an edge in early firefights.

Prioritize filling all four mod slots before investing heavily in rarer weapons.

Looting a Chip Mod.

Looting a Chip Mod.

6. Extraction Zones and Getting Out Alive

Reaching an extraction zone in Marathon is only half the challenge. Knowing what type of extraction you are walking into and how many resources you have left is just as important as the run that preceded it.

Going into a Boss Extract on near-empty ammo is a fast way to lose everything you spent the last twenty minutes collecting.

6.1 How Extractions Work

There are two extraction types in Marathon:

  • Standard Exfils: A 30-second countdown from activation. Call it in, hold the area, walk in when active, and wait out the 10-second extraction timer.
  • Guarded Exfils: Spawn a UESC AI wave that must be defeated before you can leave. Do not push these when you are low on supplies.

Extraction points spawn semi-randomly during a match rather than sitting at fixed positions from the start, and they take about a minute to warm up after activation. Do not assume an extraction zone will be in the same spot every run. Build flexibility into your route planning.

If an enemy squad uses an extraction point before you reach it, that point is consumed, and you will need to find another. Monitor the map for new points appearing as the match progresses. If all extractions are missed, a final forced Exfil spawns at the very end of the match, but relying on it is risky. Plan your extraction timing well before you hit that point.

Guarded Exfil.

Guarded Exfil.

6.2. Complete Contracts Before Extracting

Before calling for extraction, check your active Faction contract progress. Staying an extra few minutes to finish a contract can mean a significant reputation reward on top of your loot haul. The best additional loot per run comes from High-Value Targets (HVTs), world events, Data Pads, and other Runners.

If you find a Data Pad, pick it up. A blue marker will guide you toward points of interest on the map, and these typically end with quality loot.

Do not sprint in, grab the first thing you see, and extract at the first opportunity. That habit fills your vault with random junk. Take the time to be selective, prioritize salvage materials your Faction trees need, and let contract objectives guide where you spend your time in the map.

Clearing Contract objectives.

Clearing Contract objectives.

6.3. Gear Fear and the Seasonal Reset

Gear fear will hurt your progression more than losing the gear ever would. Extraction shooters are built entirely around the concept of loss. If you extract with a powerful weapon, equip it for your next run and use it to win fights. If you are not comfortable using it, sell it immediately and fund a loadout you will actually deploy.

Every season brings a full progression reset: gear, contract progress, Faction progress, and player level all return to zero. Cosmetics, titles, achievements, and Codex progression carry over, as does Liaison contract progress. There is no reason to hoard gear waiting for the perfect moment. Use it while you have it.

Contract rewards.

Contract rewards.

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