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 every raid — it’s triggered by a unique Spaceport map condition. When active, it creates a dynamic, competitive PvE objective: locate and activate the four antennas before other teams, survive enemy waves, and then race to enter the newly revealed bunker.

Inside, you’ll find data terminals that can be downloaded for XP and rare rewards, alongside high-tier loot spawns that are above normal Spaceport quality. Because antenna activation is shared, the event blends cooperation and competition as other raiders may choose to support or sabotage progress.

• Disabled: Patch 1.5.0
• Enabled: Post-Patch 1.7.2

Hidden Bunker location in ARC Raiders

The Hidden Bunker event hinges on four rooftop antenna dishes that randomly spawn around Spaceport’s central area. These antenna markers change positions each run — but any pending antenna will display a distinct map icon (white satellite dish). Zooming the map fully out helps you spot them faster.

The bunker entrance itself appears as a hatch embedded in the ground southwest of Spaceport, situated between Fuel Processing and Fuel Lines, just south of the Departure Building.

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

How 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.