ARC Raiders: Hidden Bunker Location Guide

What to know

• The Hidden Bunker is a Spaceport-only event that appears when the special map condition is active.
• To unlock the Hidden Bunker, you must fully activate four rooftop antennas, each requiring two interactions.
• The antenna progress is shared across the entire lobby, and each activation triggers ARC enemy waves.
• Once all antennas are activated, the bunker opens in the southwest of Spaceport near Fuel Lines & Fuel Processing.

The Hidden Bunker is not available in every raid; it’s part of a map condition on Spaceport. When active, it provides a dynamic, competitive objective: players must locate and activate four antennas, survive enemy swarms, and then fight to enter the bunker before other raiders. Inside, the bunker offers data terminals that can be downloaded for XP and potentially other rewards, alongside traditional loot. Because everyone in the lobby shares progress, it’s a mix of cooperation and competition.

Hidden Bunker location in ARC Raiders

The Hidden Bunker is tied to four rooftop antenna dishes that appear across the central area of the Spaceport. Their exact rooftops change every run, as the antennas spawn in random elevated positions. Any antenna that still needs activation will show up as a map icon, and zooming the map all the way out makes spotting these markers much easier.

The bunker entrance is in the south-west of Spaceport: between Fuel Processing and Fuel Lines, just south of the Departure Building.

Steps to find & unlock the Hidden Bunker

Step 1

At the start of the raid, check if the “Hidden Bunker” event is active. Locate the four antennas; open your map and look for antenna icons (white satellite-dish symbols that spawn randomly on roofs).

Step 2

Reach roofs by using ziplines, ropes, or building access (ladders, stairs) to reach antenna rooftops.

Step 3

Each antenna must be activated twice:

• First Interaction – begin the activation, which immediately triggers a wave of ARC enemies such as Wasps and Hornets. Clear the area to proceed.
• Second Interaction – after defeating the spawned enemies, interact with the antenna again to finalize its activation.

Step 4

Once all four are activated (by you and/or other players), you will get a raid-wide notification: “Hidden Bunker is now open.”

Step 5

Race to the bunker entrance:

• Head toward the southwestern area between Fuel Processing and Fuel Lines.
• Locate the bunker’s door/hatch embedded in the ground.
• Be ready to fight — expect Bastions, Bombardiers, and possibly other players.

Step 6

Enter the bunker & explore:

• Once inside, find the data terminals (terminals with lights).
• Interact to download data: stand close, wait for the progress bar.
• When the terminal lights green, retrieve data to claim rewards (e.g., XP).

Tips for Hidden Bunker

• Bring mobility tools: ziplines or snap hooks help reach hard-to-access rooftops.
• Squad up: divide tasks; some players can run antennas, others prepare to rush the bunker once open.
• Be ready for enemies: expect Hornets, Wasps, Bastions, Bombardiers. Use good weapons and cover.
• Time your activation: the entire lobby is working toward unlocking, it's a race. Try to finish antenna activation early.

We hope this guide offered all the clarity you were looking for and made your experience smoother. If you have any feedback, suggestions, or questions, drop them in the comments below. We actively read and respond, so feel free to reach out whenever you need extra help or guidance.