The Hidden Bunker on Spaceport turns a standard Arc hunt into a shared, server-wide race. One lobby works together (or doesn’t) to unlock a sealed underground complex, then scrambles to siphon data from its terminals for XP and trial progress.
The “Download Data during Hidden Bunker” trial is built around this one map condition. It’s long, chaotic, and heavily dependent on how other raiders behave, but the actual mechanics are straightforward once you see them broken down.
How the Hidden Bunker event works on Spaceport
The Hidden Bunker is a special map condition that only appears on Spaceport. When it’s active, a dedicated button and timer show up on the Play screen. If the Hidden Bunker icon is yellow, the event is live, and you can queue for it; if it’s grayed out with a countdown, it’s scheduled to start soon.
Inside the raid, everyone in the lobby shares a single progress state. Four rooftop antennas must be brought online somewhere on the map. Once all four are complete, a server-wide message announces that the Hidden Bunker has opened, and a set of doors in the southwest corner of Spaceport unlocks. From that point on, the focus shifts underground to the data download terminals.
The bunker layout and the core logic of the event stay the same from run to run, but antenna spawn locations, other squads’ behavior, and enemy patrols keep each attempt slightly different.
Requirements and recommendations before you queue
Hidden Bunker runs are tuned for raiders who already have some time in the game.
- Level requirement: At least level 15 is recommended so you can participate in the associated “Download Data during Hidden Bunker” trial and make the run worth the time.
- Loadout: Bring solid mid- to long‑range weapons and a way to disengage, like smoke grenades, since the bunker entrance is usually covered by Bastions, Bombardiers, and other Arc.
- Traversal tools: A zip line or two is effectively mandatory if an antenna spawns on top of high structures like the control tower or trench tower roofs.
- Matchmaking choice: Solos tend to be more cooperative; squads often turn the bunker into a PvP choke point. If you only care about trial progress, solo queue is safer.
Even in cooperative lobbies, expect heavy resistance from Arc while moving between objectives. Treat the event more like a long raid route than a quick side activity.
Step 1 – Activate the four antennas on Spaceport
At that point, the event shifts from a map‑wide scavenger hunt to a focused scramble around the bunker entrances.
Step 2 – Find the Hidden Bunker entrances
The Hidden Bunker sits in the southwest corner of Spaceport, between Fuel Processing and Fuel Lines. Zooming in on the map reveals three light‑gray service roads in that area; the main bunker door is along the middle path, with an alternate entrance at the eastern end of the southern path.
Once inside, the environment shifts to a dark, multi‑room underground facility with scattered loot, Fireballs, Pods, and the global focus of the event: the data download terminals.
Step 3 – How the data terminals work
Eight computers inside the Hidden Bunker drive both the XP reward and the trial. Each one loops through a simple state machine represented by a colored light on a beacon above the terminal.
| Light color | Terminal state | What you can do |
|---|---|---|
| (Light off) | Idle | Ready for someone to start a download. |
| Yellow | Downloading | Download in progress, stay close or it will fail. |
| Green | Data ready | Interact once to retrieve data and earn XP/trial points. |
| Red | Cooldown / blocked | Either a failed download or post‑retrieval cooldown; wait for the light to go off again. |
There are seven of these beaconed terminals on the lower floor of the bunker and one on the upper level in the main control room. Every player can retrieve data from each terminal once per raid. Multiple players — even from different squads — can pull data from the same terminal during a green window.
Each successful retrieval grants 500 XP and a chunk of trial score. The maximum trial score from the event is reached by collecting data from all eight terminals, for a total of 6,400 trial points.
Step 4 – Download and retrieve data from all eight terminals
Once you have eight successful retrievals, your trial progress for that run is effectively capped out. At that point, the only thing left to do is leave alive.
Step 5 – Extract to lock in XP and trial progress
Trial points and XP from the Hidden Bunker aren’t banked until you successfully extract from the raid.
Solo vs. squad strategies for the bunker
The underlying mechanics don’t change between solos and squads, but the social dynamics do.
- Solo matchmaking: Randoms in solo runs are often more focused on finishing the bunker event than on PvP. You’re more likely to see loose lines forming at green terminals and players waiting for each other to grab data before moving on.
- Squad matchmaking: Premade teams frequently camp the bunker entrance or wipe other squads inside, under the assumption that the underground complex is packed with unique loot. In practice, the visible loot is modest, and the main value is trial progress, but that doesn’t stop the fights.
Whichever queue you choose, open mic or quick text callouts help. Simply telling other raiders that you’re only there for terminals and happy to share tends to defuse some of the tension around choke points.
Is there a deeper Hidden Bunker puzzle?
The community has treated the Hidden Bunker like a multi‑step ARG. Players have tried collecting data in specific orders, synchronizing all eight terminals so their lights are green at the same time, staying in the flooded pool room until the raid timer expires, revisiting antennas with data in hand, and hunting for extra buttons or secret doors.
None of those experiments has produced any confirmed extra unlocks so far. The only consistent, verifiable function of the bunker terminals is to award 500 XP per data retrieval and to feed the weekly trial. The unusual layout, the central “orb” in the control room, and the long map timer all hint at potential future use, but for now, there is no proven secondary quest or hidden loot room tied to the data.
That could change with future updates, but as it stands, if you go through the trouble of opening the bunker and draining every terminal, the reward is XP, trial progress, and whatever standard loot you pick up along the way.
Once you understand how the rooftop antennas, bunker entrances, and terminal states fit together, the Hidden Bunker stops feeling like a mysterious puzzle and becomes a predictable — if still chaotic — XP farm. Treat other squads as potential allies until they prove otherwise, track which computers you’ve already used, and prioritize extraction over chasing rumors, and the “Download Data during Hidden Bunker” trial turns into one of the most reliable ways to spike your trials score on Spaceport.
