This guide walks you through everything you need to know to open the cellar door at the Ancient Fort, including the exact locations of electrical boxes, common battery spawn points, and tips to speed up your search. Having enough ARC Raiders Coins will also help you increase your speed.

Unlocking the Cellar Door at the Ancient Fort

The Ancient Fort looks unassuming at first-just another elevated defensive hold with a few rooms and vantage points. However, tucked along its exterior is a cellar door sealed tight with three indicator lights positioned above it. These lights directly reflect the status of the three electrical boxes you must power. If all three lights turn green, the door unlocks automatically.

Where to Find the Electrical Boxes

Unlike the batteries, the electrical boxes are always found in fixed locations. Your challenge isn't locating them-it's powering each one by slotting in a battery. Here's where to find the boxes:

Southern Exterior Wall

The first box is mounted directly on the outside of the southern wall. It's low to the ground and easily visible while circling the fort.

Inside the Tower (Upper Floor)

Enter the central tower structure and climb to the upper level. The second box is attached to the interior wall here.

Second Floor Interior Wall

Head to the upper interior walkway of the main fort building. You'll find the final box fixed against a wall on the second floor.

Once all boxes receive power, the cellar door lights turn green, and you'll hear an audible activation sound indicating the latch has released.

Battery Locations - All Known Spawn Points

The core challenge of this puzzle comes from the randomized battery spawns. Each match, three batteries appear somewhere in or around the fort-often in subtle or tucked-away spots-which means no two attempts will feel identical.

Fortunately, the Arc Raiders community has mapped out the most reliable spawn areas. While exact positions vary slightly, batteries tend to cheap ARC Raiders Coins appear in predictable zones around the fort's perimeter and on certain elevated positions.