ARC Raiders Dam Controlled Access Zone Key farming and usage guide | The secret room you may be missing in Dam Battlegrounds Map
Category: ARC Raiders Posted: Mar 14, 2026 Views: 1155
While ARC Raiders Shrouded Sky update brought a wealth of content, more than two weeks have passed, and you should have already explored most of it.
However, we reasonably suspect that there might be a secret room in the newly added Controlled Access Zone on Dam Battlegrounds map that you haven't found and entered yet - in fact, many players are unaware of it!
This room requires a Dam Controlled Access Zone Key to enter; of course, before that, you'll need to unlock Controlled Access Zone. Below, we'll provide the most comprehensive unlocking guide.

How to enter Controlled Access Zone?
The importance of this area lies in the fact that it offers loot of generally higher value and quantity than other areas in Dam Battlegrounds, increasing the chances of finding rare ARC Raiders blueprints.
To unlock this zone, you need to cooperate with three players to solve a puzzle. You can choose to team up with one or two friends and then randomly invite strangers to fill the vacancies (because the team size limit is three).
However, we recommend entering alone and then finding three players to team up with near Controlled Access Zone using close-range chat. Teaming up increases the likelihood of PvP combat and delays in unlocking the zone.
Unlocking the first door
Controlled Access Zone is located slightly north of the center of Dam Battlegrounds. There are no restrictions on entering the zone; the puzzles primarily help you unlock the general loot room.
To complete the puzzles, you and your three temporary teammates each need to find a hidden button, or one person can find one and inform the others. Here are the locations of each button:
- Button 1: Find a battery on the ground floor and insert it into the electrical box opposite the main office on the top floor to open the main office door. Button 1 is inside.
- Button 2: To the left of the locked door.
- Button 3: Near the stairs.
- Button 4: On top of the metal pipe.
Once everyone holds one button and presses them simultaneously, the four lights above the first locked door will light up, opening the door. However, after exploring for a while, you will encounter a second locked door.
Unlock the second door
Opening this door requires submitting certain materials. The materials will change each time you re-enter the puzzle, but they are common items like wires, metal parts, or ARC Powercells.
To save time, you can bring some materials into Controlled Access Zone beforehand. Even better if your partner does!
After that, you can freely loot the zone. The loot is plentiful enough for four people to share. However, if uninvited guests appear, it's best to work together to deal with them.
Dam Controlled Access Zone Key
Besides the loot room unlocked by solving the puzzle, Controlled Access Zone also has a hidden room. It doesn't require solving a puzzle, but it can only be opened with Dam Controlled Access Zone Key.

How to find this key?
Although the key's drop rate was nerfed in Patch 1.18.0, you still have a high chance of finding it if you consistently farm in the following locations:
- Dam Battlegrounds: Ruby Residence, Pale Appartments, and Pattern House
- Buried City: Grandioso Apartments, Library, Offices, and Laboratory
- Stella Montis: Security Checkpoint (Lockers)
- Blue Gate: Reinforced Reception (Security Lockers)
We highly recommend farming on these maps when events like Night Raids or Hurricanes spawn, which significantly increase loot drop rates. This should yield much better results.
If you obtain many keys, you can sell them for 100 coins each. However, it's recommended to keep them to farm the corresponding rooms multiple times.
How to find the secret room?
After obtaining the key, travel to Controlled Access Zone, then go through the doorway to find a destroyed Rocketeer hanging on the cable network. Look down, and you'll find a small door.
Jump down and use the key you find to open the door. You can then find and loot electrical panels, computers, drawers, and filing cabinets in the room. Opening them will reveal various rare blueprints or gear.
It's worth noting that there are three routes to Controlled Access Zone, and the secret room will vary depending on your location. Here's how:
- Enter from the bottom: Climb the broken catwalk and stairs until you find the door on the southwest side of the room.
- Enter through a small ladder hole: This is the fastest route to the secret room, but you might encounter PvE enemies along the way.
Is the secret room worth looting?
Overall, the loot in this room is quite valuable, but due to the room's small size, the total amount of items you can obtain is actually quite limited.
Therefore, we recommend looting this room only after a map event has spawned, especially the currently popular Hurricane, rather than wasting your key on regular raids.
Nevertheless, this is still not the worst key room in ARC Raiders and is a good option for a small loot-collecting trip, especially if you can handle it solo.
These are all the ways to unlock loot rooms in Controlled Access Zone. If you haven't fully explored this area yet, hurry up and follow our guide!
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