ARC Raiders Hidden Bunker: Secret Locations and Loot Guide

Learn how to open the Hidden Bunker in ARC Raiders, find its secret location, and grab exclusive loot and double trial points.

In the chaotic world of ARC Raiders, few events generate as much buzz as the Hidden Bunker. This cooperative challenge, exclusive to the Spaceport map, offers a unique mix of team play, high-stakes combat, and the promise of rare loot. But it's not just about what's inside—it's a race against time, a test of coordination, and a chance to double your Trial points. Here's everything you need to know to crack the code and walk away with the goods.

## What Is the Hidden Bunker?

The Hidden Bunker is a Major Map Condition that periodically appears on Spaceport. Unlike standard raids, this event transforms the entire lobby into a single squad, tasking everyone with unlocking a secret underground facility. Once open, it's a loot bonanza, but only if you can survive the trip. As of September 2026, the event remains a fan favorite, offering a fresh twist on the usual extraction gameplay.

## How to Unlock the Bunker: Antenna Activation

The first step is to locate and activate four antennas scattered across Spaceport. These are positioned to the north, east, south, and west, and they're marked on your map when the event is active. Each antenna requires you to interact with its console, but be prepared: a squad of Wasp and Hornet ARCs will spawn mid-sequence, forcing you to defend your position. After clearing them, interact again to complete the activation.

You don't have to do all four solo. Any squad in the lobby can handle them, and a global notification alerts everyone when each antenna goes down. This encourages cooperation, though you'll still want to watch your back. Once all four are active, the bunker's locks disengage, and the real fun begins.

## Finding the Secret Entrance

Despite the event's name, the bunker's location is no secret to veterans. It's always in the southwest corner of Spaceport, tucked between the Fuel Processing and Fuel Lines points of interest, just south of the Departure Building. There are two entrances, both leading to the same underground area. The one you choose might depend on where enemy ARCs are concentrated or which route feels safer. But be warned: Bombardiers and Bastions guard the entrance, and PvP encounters are common as players converge. Go in with a squad or use a dash to slip past the chaos.

## Inside the Bunker: Data and Loot

Once inside, your primary objective is to download data from eight computer terminals scattered throughout the bunker. Stand near each terminal to initiate the download, then wait for it to complete before moving on. These downloads also count toward the "Hidden Bunker Data Download" Trial, so they're essential for progression.

While you're at it, don't forget to scavenge. The bunker is packed with containers that can yield condition-specific blueprints, weapon parts, mechanical and electrical components, and rare crafting materials. These items are perfect for boosting your expedition stash value. Just remember: you only keep what you extract with, so prioritize the data downloads first, then loot on your way out.

## Maximizing Your Run: Strategy Tips

To make the most of your Hidden Bunker run, keep these tips in mind:

- **Coordinate with your lobby**: Since any squad can activate antennas, wait for the global notifications and let others do the heavy lifting if you're closer to the bunker. - **Bring heavy firepower**: The Bombardiers and Bastions at the entrance hit hard. Weapons like the Anvil or Ferro will take them down quickly, and Wolfpack grenades are great for grouped enemies. - **Stack your Trials**: The Hidden Bunker doubles all Trial points while active. Use this window to knock out multiple weekly trials in one run. Plan your route with tools like ArcMaps.com to optimize your time. - **Watch for PvP**: The bunker entrance is a hotspot for player encounters. Stick with your squad or use a dash approach to avoid getting caught in a fight.

## The Mystery Continues

Even after downloading all the data, the ARC Raiders community is still puzzled about what to do next. Some speculate there's a hidden objective or a future event that will solve the riddle. For now, your best bet is to grab what you can, make it to extraction, and live to raid another day.

The Hidden Bunker event runs on a rotating schedule, with each window lasting about an hour (40 minutes active plus 10 minutes to finish objectives). Times can shift with weekly updates, so check the live tracker to see when it's active. Don't miss your chance to double your Trial points and snag exclusive loot.

**Takeaway**: The Hidden Bunker is a must-do event for any ARC Raiders player looking to maximize their rewards. Coordinate with your lobby, bring the right gear, and you'll be swimming in blueprints and materials in no time.