The Hidden Bunker event on Spaceport is not a cute little side activity — it turns the whole raid into a lobby fight over one underground room. If you're trying to prep for it, I usually check the ARC Raiders Items list first, because going in light here feels like asking for a bad time. The short version? Four antennas, shared progress, waves of ARC, then a bunker full of terminals that every squad wants at the same time.

How the Hidden Bunker event works on Spaceport

Each active match drops four antenna spots across Spaceport, and they're usually up high on rooftops or industrial frames where you can't just stroll in and tap once. You've got to hit each one twice, and every interaction kicks off ARC pressure right away — Wasps, Hornets, the usual annoying flying trash. Progress is shared across the lobby, so you can help unlock it without being in the same squad, which is pretty cool until you realize another team can finish the last step while you're still fighting off drones. Once the fourth antenna is done, the bunker opens for everyone in that session.

Where is the Hidden Bunker in ARC Raiders Spaceport

The bunker itself sits in the southwest part of Spaceport near the Departure Building, and that spot gets ugly fast. I've seen Bastions and Bombardiers park the whole route and turn the entrances into a meat grinder, which is exactly what you'd expect from a map event built around one choke point. It's not just AI, either. Once players smell an open bunker, they start drifting there like moths to a bad idea, and suddenly the calm part of the raid is over. The whole map kind of narrows into that one room, and you feel it in the last few minutes before anyone even gets inside.

What do you do inside the bunker terminals

Inside, the game shifts from unlocking to holding your nerve. There can be up to eight terminals, and each one needs a manual download action that you have to babysit until it finishes. Step out too soon, get interrupted, or get pushed off the point, and you're back to square one on that terminal. That part is what makes the event tense for me — not the puzzle, not the route, just standing still long enough to watch a bar crawl while someone else hears your footsteps. When the download lands, you can grab the data reward, and that usually means XP, trial progress, and a shot at better loot than a normal run.

Best loadout and solo tips for the Hidden Bunker event

I had the best runs when I stopped trying to be clever. Bring a loadout that can take a hit, keep a shield or decoy in your pocket, and don't burn every resource on the first roof fight you see. The event rewards patience more than raw DPS, which is funny because the lobby acts like the opposite is true. If you're solo, you want to move late, listen for the antenna fights, and avoid the shiny brawl unless you already know where you're going next. In squads, one player can scout rooftops while the rest stay ready to rotate, and that little bit of spacing saves a ton of healing.

Is the Hidden Bunker worth the risk and what can fail

Yes, if you like messy PvPvE and don't mind losing a few kits while you figure it out. The reward curve feels hottest in the last five minutes after the bunker opens, because that's when every squad has to choose between staying greedy or getting out alive. That said, the event still has some loose ends. I haven't seen a clean public answer on antenna cooldowns, unique loot tables, or what exactly happens if the raid timer runs out while you're still inside. Some rotations also seem harsher than others, with fewer safe exits and more ARC noise pushing everybody toward the bunker whether they want it or not.

Should you rush the bunker or play it slow

Play it slow until the lobby starts telling on itself. If two antennas are already lit, you don't need to duel every rooftop team for no reason; just angle toward the bunker and save your ammo for the terminal fights. That's the part a lot of players miss. The event isn't just a lock-and-key puzzle, it's a timing game, and the squads that do well are usually the ones who stop chasing scraps and keep one eye on the exit. If you're sorting gear between runs, the ARC Raiders Misc page can help you fill the last empty slots, but the real win here is showing up with a plan and a way out.