How to Use the Supreme Leader's Bunker Access Card in MW4

MW4 DMZ sends squads into the Hajin Exclusion Zone, an extraction mode where only the gear and loot that reach exfil stay with the Operator. Locked loot rooms across the map reward squads that arrive with the matching key.

The Supreme Leader's Bunker Access Card opens a hidden bunker beneath Chang-san Air Base that holds Legendary loot. Learning how to use the MW4 DMZ Supreme Leader's Bunker Access Card starts with earning it, since no other item opens those doors. The sections below cover the mission that awards the card, the preparation that protects it, the route to the bunker doors, and the loot waiting inside.

Using Supreme Leader's Bunker Access Card Summary

• The Supreme Leader's Bunker Access Card is a Legendary key item that opens the Supreme Leader's Bunker deep under Chang-san Air Base.

• Operation Iron Citadel awards the card once a squad completes the mission and exfils with the armory manifest.

• The mission opens after the first three story missions and recommends a 3-Plate Armor Vest, a Medkit, and an Ammo Box.

• The six-digit armory code changes every match, so squads must read the fragment notes inside the bunker each time.

• The card works one time only, so a Secure Slot inside a larger backpack protects it from loss on death.

• The bunker doors sit at the bottom of a staircase inside the Chang-san Air Base Bunker, an Extreme threat area.

• The room beyond the doors holds a chest with a guaranteed Legendary weapon plus random loot.

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What Is the Supreme Leader's Bunker Access Card in MW4 DMZ?

The Supreme Leader's Bunker sits behind sealed doors deep inside the Chang-san Air Base Bunker, and a card reader controls the entrance. The reader displays a prompt that demands the Supreme Leader's Bunker Access Card, a key item that serves only that door.

The card is a Legendary key item that comes as a reward from Operation Iron Citadel. The mission also hands out an Air Base Access Card, an Armory Card, and a six-digit armory code along the way, and none of them opens the Supreme Leader's Bunker doors.

The card works as a consumable, so each bunker visit spends one copy. Story missions repeat without limit, which lets squads farm extra cards by running Operation Iron Citadel again after spending one.

How to Get the Supreme Leader's Bunker Access Card

Operation Iron Citadel awards the card, and the mission opens after a squad finishes Operation Critical Extraction, Operation Silent Ledger, and Operation Shopping Hacks. Players start it from the Story Missions list on the deployment screen at the MW4 DMZ FOB. The mission sits at Chang-san Air Base, a Critical threat zone, and recommends a 3-Plate Armor Vest, a Medkit, and an Ammo Box.

The mission follows a fixed chain of objectives from approach to exfil.

1. Find the Airbase Access Card: Searching the marked buildings triggers scans, and the scan that finds the card marks its exact location.

2. Run the card through the server room: The server room upstairs in Admin Complex No. 2 converts the card into a single-use Armory Card once the progress bar finishes, and enemies push in as the bar fills.

3. Enter the bunker and find the armory doors: The Entrance Garage leads into the Chang-san Air Base Bunker, where a corridor with red trim ends at the armory keypad.

4. Collect the code fragments: Notes in places such as the medical wing and the Control Room reveal two digits each, and together they form the six-digit code.

5. Defeat Commander Colossus and take the manifest: The Armory Manifest sits in the armory rooms, and Colossus can appear in the corridor or inside the armory.

6. Plant the explosives: Charges go on the munitions crates in the armory and on three strike aircraft around the hangar and outside.

7. Capture the SAM site: Standing inside the marked zone until the capture bar fills clears the objective.

8. Exfil with the manifest: The helicopter lands near the base fence, and boarding it with the manifest completes the mission.

The six-digit armory code changes every match, so digits from an earlier run never work and each squad must read fresh notes. Splitting up to search different bunker rooms speeds up the hunt for the remaining fragments.

Commander Colossus fires in bursts with short pauses between them, and peeking out from a doorframe during those pauses allows safe shots at his head. Exfiling with the manifest then completes the mission and grants the Supreme Leader's Bunker Access Card, the LTV infil option, and a cash payout.

What to Bring Before Using the Access Card

The Chang-san Air Base Bunker carries an Extreme threat rating, and the card represents a full story mission run, which makes careless deployments expensive. A Secure Slot protects the card, since items outside a Secure Slot vanish when an Operator fails to exfil and a lost card means repeating the entire mission. Larger packs such as the Medium Backpack add Secure Slots, and the 3D Printer crafts that pack for 50 Synthetics and 5 Rigid Synthetics.

Full armor plates and a full squad matter just as much, since the bunker rating leaves little room for a solo player to break contact. Empty slots let the chest contents and locker finds come home in the same run, and a known exit shortens the walk out once the doors open and the room is cleared.

Operators can also spend Trait Points on Extra Secure Slot, a minor trait that adds one more protected slot to the backpack. Dying without an exfil also puts the Operator into MIA status, and recovery costs DMZ Cash before that Operator deploys again.

How to Use the Supreme Leader's Bunker Access Card

Players reach the Supreme Leader's Bunker through the Chang-san Air Base Bunker, where the locked doors sit at the bottom of a staircase below Admin Complex No. 2. Landmarks mark the whole route, so squads can follow them from the bunker entrance to the doors.

The route from the bunker entrance to the loot room runs through a fixed series of landmarks.

1. Enter through the south-east doors marked ENTRANCE: The first turn after entering goes right toward the door labeled 01.

2. Press the button beside door 01: The shutters rise and open the way into the corridor.

3. Follow the corridor with Korean lettering above its entrance: The first right turn leads to a staircase.

4. Descend the stairs to the locked doors: The card reader on the right displays the Supreme Leader's Bunker Access Card prompt.

5. Interact with the door prompt: PC players press F with the card in the backpack, and the doors open.

6. Step through the doors and find the wall map: The room to the right of the wall-mounted map leads to the bedroom.

Hostile squads chase the same loot, so moving quickly through the shutters and corridor shortens the time spent exposed.

Squads already inside Admin Complex No. 2 have a shorter option, since players report that stairwell 02 leads down a corridor and metal stairs to the white blast doors. Both approaches end at the card reader.

What Loot Is Inside the Supreme Leader's Bunker in MW4 DMZ?

A chest stands to the left of the bedroom and contains a guaranteed Legendary weapon plus randomized loot. The chest gives squads the clearest reason to spend a card on the bunker.

The bunker also holds weapon lockers and other valuable items, so a full sweep before leaving pays off. Every item picked up still needs a safe trip to exfil.

The Gunsmith station opens at DMZ level 10 and lets Operators modify weapons, so extracted Legendary finds can become full builds. A weapon tier list helps decide which finds deserve attachments.

FAQs About the Supreme Leader's Bunker Access Card

Final Words

The Supreme Leader's Bunker shows how DMZ ties story missions to real loot, with a hard mission funding a hard room. Operators that grow stronger through repeated runs find Operation Iron Citadel easier each time, and the bunker then becomes a dependable source of Legendary weapons for the whole squad.

Treating the card as a reward for skill and the bunker as the payoff keeps the loop satisfying instead of frustrating. Squads that approach each visit as a planned objective get the most from every card they earn.

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