MW4 DMZ Reactor 02 Control Room Key
Unconfirmed: reported by the DMZ Codex fan database, read 24 October 2026. Check the grid on the key’s own description in game.
The MW4 DMZ Reactor 02 Control Room key reportedly opens the upper-catwalk control room inside the Reactor 02 building, in Haneul Nuclear Reactor, grid H4. Only one source has reported it so far, so treat this page as a lead until a second source or a matching player report agrees.
| Reported grid | H4 |
|---|---|
| Area | Haneul Nuclear Reactor (Northeast Hajin, former South Korean territory) |
| Reportedly opens | The upper-catwalk control room inside the Reactor 02 building |
| Rarity | Rare (reported) |
| How to get it | Not reported yet. Keys drop as loot in containers, and Lieutenants can drop the key to their own room. |
| Area threat | Up to High (Haneul Nuclear Reactor, official rating), with radiation zones |
| Status | Unconfirmed, one source |
Where the Reactor 02 Control Room is
A breached nuclear plant on the northeast coast. The reactor is High threat and covered by a radioactive cloud: you need radiation protection and a gas mask to survive inside.
The report places the Reactor 02 Control Room door in Haneul Nuclear Reactor at grid H4: the upper-catwalk control room inside the Reactor 02 building. Our MW4 DMZ map marks Haneul Nuclear Reactor itself, not this door, because the door has not been confirmed. Our grid overlay is approximate, and some reported grids fall outside it, so trust the grid printed on the key in your backpack.
Before you go to Haneul Nuclear Reactor
- Haneul Nuclear Reactor is rated up to High threat by Activision. A duo or a careful solo run is realistic, but expect other squads drawn to the same loot.
- Parts of the area are irradiated. Bring radiation protection, and do not stay longer than you need to.
- Do not enter without radiation gear and a gas mask.
- The official guide suggests a waterborne insertion or the tunnel from Compound Delta.
Help confirm the Reactor 02 Control Room
Opened this door? Send a screenshot of the key description with its grid, plus one of the door or the room. Two matching reports move the key to the confirmed list, with a map marker and your nickname in the update log.