DMZ key priority: which rooms to use first and which to save

Use a key when its destination solves a current shortage and you can afford the whole run. A Legendary key can be a poor choice for an under-equipped Operator. An ordinary room near your active objective can be more useful than another expensive cross-map trip.

Make a three-question shortlist

For each key, ask: what does it open, what do I need from there, and can I reach and leave it? Use the Key Finder to separate where a key was found from where it is used. Read the exact item name and remaining uses in your inventory; do not apply another key’s durability rules.

Your situation	Priority decision
Basic supplies missing	Use a manageable supply route before an expensive keyed room
Useful key and reachable door	Choose a nearby room with a clear purpose and exit
Specific Recipe or Manual needed	Target a relevant observed search; no fixed drop promised
Final key owned, earlier door unresolved	Solve building access before risking the final key
Extreme route, no replacement kit	Save the key until the full attempt is affordable

Start with accessible destinations, then assess the door

Mirae Electrical Room and the Gun Store lockers offer established destination guidance. Choose one that fits your deployment rather than promising a fixed valuable. Clear the immediate route and confirm the named prompt before spending the key.

A low-rated surrounding area does not certify the room or approach as safe. The Doctor’s upper office, for example, is a separate climb and lock; a nearby boss fight changes the decision. Check defenders, other squads and the return path in your actual match.

Prefer a targeted recipe search when access is already solved

Choose a room tied to the recipe you need rather than looting unrelated locked doors. The recipe and Manual route comparison covers observed searches in Re-Education Center Annex, Reactor 02 Control Room and other keyed locations. Those finds are examples, not permanent container contents.

Take the correct key and protection, leave an eligible Secure Slot free and inspect the pickup name. A finished vest or gun does not unlock its recipe or Manual. If the desired item is absent, reassess the cost of a later attempt instead of assuming you missed a guaranteed drop.

Resolve extra access requirements before the deployment

Militia Arms Depot separates Apartment B access from the lower armory. Roze’s armory is not her DBN boss arena. The Air Base bunker separates the mission card, Supreme Leader card and DRC key. Owning a final-room key does not prove access through every earlier door.

Keep, use or sell with a reason

Keep a key reserved for a known mission or intended room, and keep a duplicate when another affordable opening has a clear purpose. Use it when the route, equipment and exit align. Consider selling an unneeded spare only after checking its current vendor value and your reserves; no universal key resale ranking is established here.

For example: if today’s shortage is basic healing ingredients, a protected reactor detour may cost more than the medical route. Save the reactor key until its specific room is the goal. Before leaving the FOB, write down one target room and one stop condition; avoid taking every valuable key into the same deployment.