Modern Warfare 4 DMZ Beginner’s Guide: How Hajin, the FOB, and Extraction Work

DMZ launches in Modern Warfare 4 on October 20 for anyone who has digitally pre-ordered the Standard or Vault Edition, and to everyone else on October 23. It is the franchise’s first fully persistent extraction mode since support for the original DMZ ended in late 2023, and it is built around a single open-world map called the Hajin Exclusion Zone.

This guide walks through every system Infinity Ward has detailed so far: the zone, the hub between deployments, the crafting loop, the persistent Operator, the three deployment types, and what extraction actually costs you when it goes wrong.

What DMZ actually is (and what changed since 2023)

Call of Duty’s first DMZ arrived with 2022’s Modern Warfare 2 and was expanded over the following year. Support ended in late 2023, after players and the studio agreed it had been left as “an underwhelming prototype,” as IGN’s coverage of the reboot put it. Modern Warfare 4’s version is a full rebuild. Infinity Ward multiplayer creative director Joe Cecot, in a recent behind-the-scenes video cited by IGN, called the original mode “a very approachable, fun sandbox.” He then added: “There’s a bunch of stuff we left on the table, so as soon as we finished with the last game, we were just gung-ho on, ‘OK, we know what we want to do.'”

The October 9 Activision blog describes the reboot as Call of Duty’s “definitive extraction shooter experience,” with “persistent progression” inside an open-world combat environment. You drop in, loot, complete objectives, fight both AI enemies and rival human Operators, and try to extract with what you earned. If you die before extracting, you lose the Operator’s gear and the loot they were carrying. That loop is the entire game.

The Hajin Exclusion Zone

Every deployment happens in Hajin, a fictional war-torn city built on the events of the Modern Warfare 4 campaign. Activision’s October 5 deep-dive lists fourteen named points of interest: the 14th Political Prison, Chang-san Air Base, Deadtown, Imjin Farmland, Cheongun Village, Mirae General Hospital, Cheonwang Peak Array, Haneul Nuclear Reactor, NuriGO Mall, The Grid, Songdo Wharf, Wolves Stadium, Hajin River Heights, and a long list of “minor points of interest” with their own loot and side stories. The map mixes urban, rural, industrial, and coastal terrain, with vehicles that include land transport, rail transit, watercraft, and aircraft.

The narrative frame, per the October 5 blog, is that the campaign has just ended, leaving a power vacuum. You are picking up the pieces, identifying a new threat, and dismantling it across repeated deployments. Each deployment also has a procedurally tracked after-action report: an S-tier rating is what you are aiming for, weighted across combat, looting, and objectives.

The FOB and what to unlock first

Between deployments you operate out of the Forward Operating Base (FOB), a navigable encampment that unlocks more stations as you progress. The FOB is where you craft, store loot, manage your Operators, and deploy. Stations arrive in a fixed order, and the order matters for your first hour.

DMZ Player Progression runs from 1 to 70, and every few levels opens more 3D Printer recipes, more FOB stations, and more content. The smart early move is to ignore the 3D Printer until it unlocks at Level 2, then check the FOB’s Stations screen to learn where specific materials drop, per the October 9 Activision blog. That hint drives your first few routes through Hajin.

Crafting with the 3D Printer

The 3D Printer is your crafting station back at the FOB. It uses two separate currencies. Resources are the four common materials, Synthetics, Electronics, Chemicals, and Metals, that the system automatically breaks looted items down into inside your Backpack and Stash. 3D Printer Ingredients are rarer, location-specific materials. Binding Catalyst, Biomaterials, Detonators, and Control Units are the four examples Activision names. These are found in specific areas of Hajin and are used to build a single new item.

When you have enough of each, choose how many copies of an item to craft, and where the finished item goes. The options: straight to your Stash for later, or onto your active Operator for the next deployment. Recipes can also be found during a deployment and, if you extract with them, used back at the FOB. The October 9 Xbox Wire summary frames this as the “things to do when you come back to the FOB with zero kills” loop. Even a quiet deployment can return with handfuls of Electronics or a comms module worth crafting into something useful.

Your Operator: traits, MIA, and Prestige

DMZ’s persistent character system is the feature that makes a failed deployment sting. You start with two Operator slots and unlock a third as you progress. Each Operator levels up by surviving deployments and earning DMZ XP, and every successful exfil adds to their Dog Tags, which is how you earn Trait Points to spend across three trees.

• Warfighter Traits include Combat Resistance, Quick Fix, and Viper Sense, focused on direct combat.
• Scout Traits include Thermal Padding, UAV Upgrade, and Field Crafting, focused on recon and utility.
• Survivalist Traits include Faster Revives, Free Revives, and increased Consumable Duration, focused on staying alive.

You can earn up to 18 Trait Points and pick from more than 60 Traits, per the Xbox Wire summary, so each Operator is genuinely specialized. The catch is the MIA system: if an Operator fails to extract, they go missing in action, and you either pay DMZ Cash to recover them or dismiss them. The recovery cost rises with how many Trait Points you invested. Recovered Operators keep their Traits but lose their gear, so a high-level Operator is expensive to lose and expensive to bring back. That is where the real weight of every deployment lives.

Deployment types: Story Missions, Dynamic Operations, Free Roam

There are three ways to deploy, and they each give you a different reason to leave the helicopter.

• Story Missions are narrative-led, replayable, and gated behind prerequisites. Each one lists briefing intel, required objectives, and rewards, usually high-value gear and DMZ Cash, with the option to roll a random mission for variety and milestone rewards.
• Dynamic Operations give your squad multiple goals inside a single deployment. Pick one, complete it, and you earn DMZ XP, DMZ Cash, and the right to call in a Supply Drop with loot that increases in rarity (Common, Uncommon, Rare) for each successful Op. The Xbox Wire summary calls the Supply Drop “the extra payoff that adds anticipation to every successful Op.”
• Free Roam is the no-objective version: drop in, loot, fight, and extract at will. Good for testing a Loadout or chasing a specific ingredient.

Extracting alive

The exfil is the extraction shooter’s whole dramatic point. Call it in, watch the chopper come in, and survive the few seconds while every nearby Operator and AI squad closes on your position. DMZ inherits that tension, and the October 9 Xbox Wire summary leans into it: “That final sprint to exfil is where all the planning, looting, and hard-won progress are put on the line.” Your Bank and Stash contents are shared across all Active Duty Operators, so a high-value haul can pay for the next deployment even if the Operator who extracted it gets killed on the run after.

Our read

Two things make this DMZ worth your pre-order. First, the persistent Operator. A 60+ Trait tree with MIA recovery costs that scale with investment is the rare extraction-shooter mechanic that changes how you play, not just how you progress. You will plan routes around the Operator you cannot afford to lose, which is the kind of tension the genre needs more of.

Second, the FOB unlock order is designed to onboard you slowly. The first hour in DMZ is the same six Stations, the same Stash-and-Loadout loop, and the same 14 POIs the lead mission walks you through. If you only have an hour on launch day, you can finish your first Story Mission, learn the 3D Printer, and extract with a Loadout you actually chose.

We counted the unlock ladder. Working from the October 9 Activision blog’s FOB station table, the early game crosses six free Stations, the 3D Printer at Level 2, the Boss Board after Order 2, the Vendor at Level 5, the Gunsmith at Level 10, and the Dog Tag Case at Level 20. That gives players a steady drip of new tools: a crafting station within the first deployment, weapon building by mid-game, and cosmetic endgame content by Level 20. The pacing compares to the original DMZ, where the Gunsmith was the entire endgame grind.

If you only have one deployment’s worth of time on October 20, do this: deploy solo or as a duo, take a Story Mission, ignore other Operators for the first 10 minutes while you loot, and extract with whatever you find. Use the haul to craft at the 3D Printer, then run one Dynamic Operation before logging off. You will earn your first Trait Point, learn the loop, and not lose your Operator on day one.

For crossplay, cross-progression, and the pre-order benefits, see our MW4 crossplay guide and pre-order guide. For DMZ early access, the Oct 20 date and what to pre-order are in our news story. For PC system requirements, see the MW4 PC specs guide. Everything else is on the MW4 hub and our release calendar.

Edited by Kerwin Stewart, Editor-in-Chief · How we report