ARC Raiders BluePrints: How to Unlock the Hidden Bunker

Arc Raiders thrives on hidden secrets and high-stakes rewards, and few challenges are as rewarding as unlocking the Hidden Bunker. This underground facility, tucked away on the Spaceport map, holds rare crafting materials, high-tier weapons, and progress toward seasonal trials.

Opening it isn't a straightforward task, though. It demands timing, strategy, and the ability to fend off both AI enemies and rival raiders. This guide breaks down every step to access the Hidden Bunker, from recognizing when it's available to ARC Raiders BluePrints extracting your hard-earned loot safely.

1. Confirm the Hidden Bunker Event Is Active

The Hidden Bunker isn't a permanent location- it's tied to a timed map condition exclusive to the Spaceport (Accera Spaceport) map. This event appears in short windows, often lasting around one hour at a time, with unpredictable timing in recent updates.

Before deploying, check the play menu for a glowing yellow "Hidden Bunker" tile. If it's grayed out, a countdown will show when the event will next go live.

When active, the match duration extends from 30 to 40 minutes, giving you extra time to complete objectives and extract loot. Note: The Hidden Bunker does not spawn on any other map, including Blue Gate, which has a separate secret bunker with a different unlock process.

For players aiming to complete the event's data-download objective, being level 15 or higher is recommended to fully benefit from the rewards.

2. Prep Your Loadout for the Challenge

The Hidden Bunker is high-risk, high-reward. You'll face swarms of ARC enemies and competing raiders, so coming prepared is non-negotiable. Here's what every successful raider brings:

Essential Gear

Ziplines: Most antennas (critical for unlocking the bunker) spawn on rooftops. A zipline lets you reach them quickly without wasting time climbing or fighting through ground-level enemies.

Crowd-Control Weapons: ARC wasps and hornets spawn when you activate antennas. A heavy or medium weapon will help you clear these swarms fast.

Healing and Repair Items: Medkits are vital-healing options are limited inside the bunker, and you'll need to recover from fights with enemies and rival raiders.

Strong Armor: You'll take fire from both AI and other players. Don't skimp on protection-invest in armor that can withstand heavy damage.

Squad vs. Solo Play

While you can open the bunker solo, it's far easier with a squad. Teammates can cover you while you activate antennas, clear enemy swarms, and defend against rival raiders.

If you're going solo, prioritize speed and stealth. Avoid unnecessary fights, use cover to sneak past enemies, and focus solely on activating the antennas as quickly as possible.

3. Step-by-Step: Activate the Four Rooftop Antennas

The core of unlocking the Hidden Bunker is activating four rooftop antennas scattered across the Spaceport map. Progress is shared across the entire lobby-so even if other squads activate some antennas, you'll still benefit.

Step 1: Locate the Antennas

When the Hidden Bunker condition is active, four white antenna icons will appear on your map. They spawn one each to the north, south, east, and west of the map's center, but their exact rooftop locations change every match.

Common spawn points include the Departure Building, Rocket Assembly, Control Tower, and Shipping Warehouse. Mark an antenna icon on your map to get a in-game guide to its location.

Step 2: Activate Each Antenna (and Defend It)

Activating an antenna requires two interactions. First, interact with the terminal to "establish connection"-this triggers an alarm and spawns ARC wasps and hornets nearby.

Clear the enemy swarm before proceeding. If you move away or die during this step, the activation will reset, and you'll have to start over. Additionally, you must protect the antenna itself-it has low health and can be destroyed by ARCs.

Once the enemies are defeated, interact with the antenna again to send the unlock signal. The antenna's icon will disappear from the map for the entire lobby, indicating it's active.

Step 3: Repeat for All Four Antennas

Move quickly between antennas, but don't rush blindly. The western approach to the buy ARC Raiders Weapons bunker is exposed, so use cover to avoid third-party ambushes as soon as any antenna is activated.

If you encounter rival raiders, decide whether to fight or flee. Remember-progress is shared, so you don't need to activate all four antennas yourself. Focus on staying alive first.