The ARC Raiders Ancient Fort Puzzle is a challenge you must complete to open the cellar door and gain access to a loot room. To solve this puzzle, you must find three batteries in the nearby area.
Let’s see what you need to do to enter the secret room in the Ancient Fort!
How to Complete the ARC Raiders Ancient Fort Puzzle

The Ancient Fort is in the southeastern part of the Blue Gate map. If you check the eastern side of the building, you will notice a locked cellar door. To open the door, you need to collect three batteries to activate three generators.
Where to Find the Three Ancient Fort Generators
The generators have fixed locations. Keep these spots in mind, as you will need to return a battery to the generator/electrical box to activate it.
First Generator

To the back of the main fort building, close to the cellar door.
Second Generator

On the first floor, on the right side of the stairs.
Third Generator

In the room on the second floor, to the left of the stairs.
Where to Find the Batteries to Solve the Ancient Fort Puzzle in ARC Raiders
You can find the batteries/fuel cells in several locations in the surrounding area. Check all the damaged structures in the vicinity of the main fort building. As soon as you find a battery, pick it up and insert it into a power generator. Repeat three times and you will hear a sound, indicating that the cellar door is unlocked.
The Ruined Structure With the Satellite Dishes

Check the ruined house to the east of the Ancient Fort.
The Ruined Structure With the Chairs

Inside the destroyed house to the southwest of the fort, you can find fuel cells.
Car Wreck

You might find the batteries to solve the ARC Raiders Ancient Fort Puzzle near the car wreck southwest of the main building.
To the North of the Fort

Follow the road leading north to reach this possible spawn location.
Inside the Fort

Check the room with the loot containers.
Check out more ARC Raiders guides!
| ARC Raiders Red Room – How To Solve The Red Room Puzzle On Blue Gate |
| ARC Raiders – List of Outfits & Backpacks Cosmetics |
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