The Hidden Bunker is one of the best Spaceport map conditions in ARC Raiders since it turns the raid into a lobby-wide unlock objective that can get messy fast.
When this condition is active, the bunker starts out sealed, and players across the entire lobby can work toward opening it.
The problem is that teamwork isn’t guaranteed in ARC Raiders, so even if the event promotes cooperation, you’ll often see squads let others do the hard work and then swoop in for the reward.
If you want to reach the bunker before it turns into a full PvP trap, you’ll need to understand what the event is asking you to do, where the entrances are located, and what’s worth grabbing inside before extracting.
How Do You Know if Hidden Bunker Is Active on Spaceport?
Before you do anything else, you need to make sure the Hidden Bunker map condition is actually live on Spaceport.
It doesn’t appear permanently, and instead shows up in limited time windows. Some players describe it as running for around one hour at a time, and later updates mention the timing has gotten less predictable since additional map conditions were added.
The easiest way to confirm availability is from the Play screen: if the Hidden Bunker condition is highlighted (commonly shown in a more active color), it’s currently running and you should queue immediately.
If it appears “inactive” or grayed out with a timer, that means it’s coming soon.
Either way, this event isn’t something you can always run whenever you want, so it’s best to plan your raid around it.
Also, if you’re trying to complete the event-related objective tied to downloading data, you’ll ideally want to be around Level 15 or higher, since that’s where certain progression systems become relevant and reward you properly.
How Do You Unlock the Hidden Bunker in Arc Raiders?
Once you load into Spaceport during the Hidden Bunker condition, the first major step is unlocking the bunker by activating four antennas located around the map.
If you open your map right away, you’ll notice four antenna icons. Their exact locations won’t be identical every match, but the overall logic stays the same.
The event spreads them out so one tends to appear in each major direction north, east, south, and west, forcing players to travel across the map.
You don’t need to personally activate all four antennas to succeed, because the match treats it as a raid-wide effort.
That means one squad might grab the eastern antenna while another squad handles the north antenna, and the bunker will still open once all four are completed.
Because of this, the bunker can sometimes open fast if the lobby is efficient, so it’s smart to keep an eye on announcements and not waste too much time looting early.
Where Do Antenna Locations Spawn During the Hidden Bunker Condition?
You can’t activate an antenna until you physically reach it, and this is where many runs fall apart because antennas often spawn on rooftops, which can be frustrating to climb to.
This is why experienced players often recommend bringing ziplines, because certain antenna placements can be extremely difficult (and sometimes basically impossible) to reach quickly without one.
Once you make it onto the roof, you’ll find a terminal or console located below the satellite dish.
Interacting with it begins the antenna process, usually by initiating a connection sequence.
Activating an antenna isn’t a peaceful step, since it draws attention and triggers ARC response units.
You’ll commonly need to fight off fast threats like Wasps and Hornets before you can safely finish the job.
After the connection phase completes, you’ll interact with the console again to send the unlock signal.
Once it succeeds, the whole lobby is notified that an antenna has been activated, and you’ll see clear progress feedback as more antennas go online.
When the fourth antenna is finally activated, the event announces that the Hidden Bunker is now open, and that’s the moment where the entire raid shifts.
At that point, it’s a full-on race, both against ARC threats and against other players, because the Hidden Bunker entrance is located in Spaceport’s southwest, typically described as lying between Fuel Processing and Fuel Lines near the fuel infrastructure.
More specifically, it’s often described as being hidden near a rocky stretch of terrain, close to a mound/hill formation.
Many players also orient themselves using the Departure Building, with the bunker being southwest of it.
The key thing to know is that the bunker doesn’t show up as a standard point of interest, so instead of chasing a large structure, you need to scan for bunker entrances tucked into the terrain.
How Do the Data Terminals Work?
Once you’ve collected data (and looted what you can), the most important part is leaving alive.
A large number of Hidden Bunker runs fail at extraction because players get greedy and remain inside too long.
If the bunker entrance gets swarmed by ARC reinforcements or enemy raiders, it’s often safer to disengage, rotate out, and head toward the nearest extraction instead of forcing a fight at the door.
The bunker might feel like the “main mission,” but the loot is only yours if you make it out alive.
That’s why the smartest Hidden Bunker strategy is to play it like a timed heist where you enter fast, finish the data objectives, secure the best loot, and extract before everyone swarms the bunker.
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