Arc Raiders Hidden Bunker
How to Open, Locations & Loot Guide
Unlock the Hidden Bunker on Spaceport, grab blueprints, and double your trial points.
⚡ Quick Summary
Spaceport-exclusive cooperative event. Activate 4 antennas → unlock the bunker → download data from 8 terminals → collect blueprints and loot → extract. Doubles all Trial points.
Is Hidden Bunker Active Right Now?
Check the live rotation tracker to see if Hidden Bunker is currently running on Spaceport — or when the next window starts.
How to Open the Hidden Bunker
Find the 4 Rooftop Antennas
Four antennas are located on rooftops across Spaceport — north, east, south, and west. They're marked on the map when the condition is active.
📍 View antenna locations on ArcMaps →Activate Each Antenna
Interact with the console → defend against spawning Wasp and Hornet ARCs → interact again to send the unlock signal.
✅ You don't need to solo all 4. Any squad in the lobby can complete them — global notifications alert everyone when each antenna is done.
Enter the Bunker
Bunker entrance: southwest Spaceport, between Fuel Processing and Fuel Lines, south of the Departure Building. Expect Bombardiers and Bastions guarding the entrance.
📍 View bunker entrance on ArcMaps →Download Data & Loot
Inside the bunker, stand near each of the 8 computer terminals to download data. Collect loot from containers — including condition-specific blueprints.
Extract Safely
Grab everything you can carry and head for extraction. Trial points and loot only count if you extract.
When Does Hidden Bunker Appear?
The Hidden Bunker rotates on a schedule as part of Spaceport's map conditions. Known window times:
⏰ Each window lasts ~1 hour (40 min active phase + 10 min to finish objectives). Times may shift with weekly rotation changes — always check the live tracker for the exact current schedule.
What's Inside the Bunker?
📋 Data Terminals
8 computer terminals scattered throughout the bunker. Stand near each to download data. Also completes the "Hidden Bunker Data Download" Trial.
📘 Condition Blueprints
Containers inside may drop condition-specific blueprints exclusive to the Hidden Bunker event. Container types were adjusted in patch 1.13.0.
💰 High-Value Materials
Weapon parts, mechanical components, electrical components, and rare crafting materials. Great for expedition stash value.
🎯 2x Trial Points
Hidden Bunker is a Major Map Condition — all trial points are doubled while it's active. Run your weekly trials here for the fastest completion.
Strategy Tips
Coordinate With Your Lobby
You don't need to activate all 4 antennas yourself. Other squads in the lobby will help — wait for the global notification that each one is done.
Bring Heavy Weapons
Bombardiers and Bastions at the entrance hit hard. The Anvil or Ferro will take them down fastest. Wolfpack grenades work great on grouped enemies.
Download Terminals First
Data downloads are timed. Complete the terminal objectives first, then scavenge leftover loot. You can loot on the way out.
Stack Trials + Bunker
Use the 2x trial points from Hidden Bunker to crush multiple weekly trials in a single run. Plan routes using ArcMaps.com.
Watch for PvP at the Entrance
The bunker entrance is a hotspot for player encounters. Go in with a squad or use a dash approach to slip past fights.
Related Guides
Track Hidden Bunker Live
See exactly when Hidden Bunker is active on Spaceport. Never miss a loot window.