How to Unlock the Hidden Bunker in Arc Raiders

What Is the Hidden Bunker?

The Hidden Bunker is a special map condition event that appears on the Spaceport map in Arc Raiders. When active, it introduces an underground bunker filled with loot and interactive terminals — but you must unlock it first.

Where to Find It

• The bunker is located on the southwestern side of Spaceport, just between the Fuel Processing and Fuel Lines areas, south of the Departure Building.
• This area isn't normally marked on the map — you'll need to remember the general region or use visual landmarks once you're on the Spaceport map.

How to Unlock the Hidden Bunker

Here's the step‑by‑step process:

1. Trigger the Map Condition

• The Hidden Bunker only appears when the map condition is active on Spaceport during that raid. It might not be present every session.

2. Activate Four Antennas

Four antenna dishes spawn randomly on rooftops around the Spaceport.

These antennas are marked on your map with antenna icons — look for them right after you load in.

Interact with each antenna twice:

1. The first activation waves ARC enemies (like Wasps or Hornets) toward you.
2. The second locks in the antenna's progress.

You can activate all four yourself, or the lobby as a whole can split the work.

3. Unlock Notification

• Once all four antennas are fully activated, a message will broadcast to the entire raid: the bunker is now open.

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Inside the Hidden Bunker

After unlocking:

Loot & Data Terminals

• You'll find weapon and ammo crates, high‑tier gear, and multiple data terminals inside.
• Interacting with data terminals lets you download and retrieve data, which grants XP.

Enemies & Risks

• The area is defended by ARC units (like Bastions and Bombardiers), so don't rush in unprepared.

Notes & Community Findings

• Some players see the data terminals and internal bunker mechanics as a kind of evolving puzzle that the community is still trying to fully understand.
• Temporary status: As of late 2025, developers briefly disabled the Hidden Bunker event due to player exploits, so it may not always be available until fixed or updated.

Quick Tips for Success

• Bring ziplines or mobility tools to reach antenna rooftops.
• Activate antennas early — other teams might beat you to unlocking it.
• Clear out ARC hosts before grabbing data — that minimizes risk while downloading.