ARC Raiders Ancient Fort Puzzle Guide: How to Unlock the Cellar Door (All Fuze Locations)

How to Unlock the Ancient Fort Cellar Door in ARC Raiders

The Ancient Fort in ARC Raiders is one of those locations that immediately catches your attention when exploring Blue Gate. This crumbling fortress sits prominently on a hill, and if you’ve poked around its western wall, you’ve probably spotted the locked cellar door with three mysterious bulbs glowing on it. That door is hiding some seriously valuable loot, but getting inside requires a bit of detective work.

The puzzle mechanic here is similar to the one at Raider’s Refuge, where you need to power up multiple switches to gain access. For Ancient Fort, you’ll need to hunt down three fuze cells (also called power cells or batteries) and plug them into three separate fuze boxes around the fort. It sounds straightforward, but with 10+ potential spawn points for the fuzes, it can feel like a scavenger hunt.

Where to Find Ancient Fort in Blue Gate

Ancient Fort is located at the southern edge of the Blue Gate map. It’s classified as a medium-value loot area, which means two things: you’ll likely run into other players competing for resources, and there’s a decent amount of ARC machine activity to watch out for. The fortress itself is hard to miss—just look for the stone walls and elevated position overlooking the surrounding area.

The cellar door you’re trying to open sits at the base of the western wall of the fort. You’ll recognize it immediately by the three bulb indicators on the door itself.

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Finding All Three Fuze Boxes at Ancient Fort

Before you can open the cellar door, you need to know where to insert the fuze cells once you find them. There are three fuze boxes scattered around the Ancient Fort, and they’re pretty easy to spot once you know where to look:

Fuze Box Locations:

• Fuze Box #1: Located on the exterior at the base of the south wall of the Ancient Fort
• Fuze Box #2: Found just past the first set of stairs inside the fort, in the second-floor courtyard area
• Fuze Box #3: Inside the main fort building on the second floor, right next to the ladder that leads to the rooftop

Mark these locations mentally as you explore, because you’ll need to backtrack to each one once you’ve collected the fuze cells.

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All Ancient Fort Fuze Battery Spawn Locations

Here’s where things get interesting. The fuze cells don’t have fixed locations—instead, they spawn randomly on wooden pallets scattered around and inside the Ancient Fort. There are at least 11 documented spawn points, though only three fuzes will appear per match.

This means you’ll need to check multiple locations each time you attempt this puzzle. The good news? Once you know all the potential spots, the search becomes much faster.

Complete List of Fuze Spawn Points:

West Side Locations:

1. Fuze Location #1: West of the fort in a derelict house with a pole inside
2. Fuze Location #9: Northwest edge of the fort on wooden pallets

South Side Locations:

3. Fuze Location #2: Directly across from the exterior fuze box on the southern side
4. Fuze Location #3: Right next to Fuze #2, beside a destroyed car

East Side Locations:

5. Fuze Location #4: East of the fort inside a broken house with radio dishes and a generator
6. Fuze Location #5: Northeast edge near a broken house by the zipline
7. Fuze Location #6: Further northeast from #5, in a destroyed house with shelves and a sofa

North Side Locations:

8. Fuze Location #7: Head west along the road from #6 to find a pallet with two traffic cones
9. Fuze Location #8: Continue west past the fallen pole to another broken house structure (pallet outside)

Inside the Fort:

10. Fuze Location #10: Inside the fort, turn right from the first stairs into a room with a hole in the ceiling (pallet near lockers)
11. Fuze Location #11: At the very top of the Ancient Fort next to the large antenna (use the ladder near Fuze Box #3)

Pro tip: Don’t waste time checking every location sequentially. Do a quick scan of the exterior spawn points first, then sweep through the interior. The fuzes glow slightly, making them easier to spot if you’re moving quickly.

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How to Complete the Ancient Fort Puzzle

Once you’ve located all three fuze cells, the rest is simple:

1. Pick up each fuze cell (they’re small, cylindrical objects)
2. Insert them into the three fuze boxes around the fort
3. The cellar door will automatically unlock once all three boxes are powered

What’s Inside the Cellar?

The Ancient Fort cellar contains:

• One weapon case (guaranteed high-tier weapon blueprint)
• Multiple lootable containers including drawers, cabinets, and metal panels
• Various high-value crafting materials and resources

This makes the Ancient Fort one of the better loot spots in Blue Gate, especially if you’re trying to upgrade your weapons or expand your workbench.

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Important Tips for Ancient Fort Runs

Watch for Enemy Players: Since Ancient Fort is a medium-value location, it attracts a lot of attention. Always approach cautiously and listen for footsteps or gunfire before committing to the puzzle.

Use Your Safe Pocket: Once you grab the best loot from the cellar, immediately store your most valuable item in your Safe Pocket. This ensures it auto-extracts even if you get eliminated.

Plan Your Extraction: Don’t linger after looting. Head to the nearest Raider Hatch immediately. If you need a guaranteed safe extraction, consider getting a Raider Hatch Key before attempting this puzzle.

Check the Interactive Map: For visual learners, the full Blue Gate interactive map can help you plan your route more efficiently.

Related Resources:

• Need Mechanical Components for crafting? Check the loot tables.
• Looking for more blueprint farming spots? We’ve got you covered.
• Want to maximize your haul? Learn how to increase your backpack space.

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Final Thoughts on the Ancient Fort Puzzle

The Ancient Fort cellar puzzle isn’t particularly difficult once you understand the mechanics, but the random fuze spawns add just enough unpredictability to keep things interesting. The real challenge comes from balancing speed (so you can loot and extract) with caution (to avoid getting ambushed by other players).

If you’re playing solo, consider completing this puzzle during off-peak hours or later in a match when fewer players are active. For squad play, have one teammate watch for threats while the others hunt for fuzes.

For more puzzle locations and quest guides in ARC Raiders, check out our complete quest list and other dungeon-style locations like the Hidden Bunker event.

Available Now:

• PlayStation Store
• Xbox Store

Good luck out there, Raiders! May your fuze hunt be quick and your extractions clean.