The Ancient Fort in ARC Raiders is one of the most rewarding yet tricky locations on the Blue Gate map. Hidden beneath the crumbling fortress lies a locked cellar door holding rare loot and advanced components. To unlock it, players must locate three fuze batteries (or power cells) scattered around the area and install them into specific fuze boxes on the fort’s walls and upper levels.
What Is the Ancient Fort Cellar Puzzle?
The Ancient Fort puzzle is a multi-step environmental task located at the southern end of the Blue Gate map. It’s a high-risk, medium-loot zone often patrolled by ARC machines and rival Raiders. The challenge involves finding three fuze batteries from random spawn points and carrying them—one at a time—to the fort’s three fuze boxes.
Each battery is heavy and slows your movement, leaving you vulnerable to ambushes. Team coordination helps, but solo players can still complete it with patience and planning.
All Fuze Box Locations in Ancient Fort
There are always three fixed fuze boxes that must be powered to unlock the cellar door. You can easily locate them by following the black cables connected to the locked cellar.
- Fuze Box 1 – South Wall (Exterior): Found outside the fort on the southern wall, near the base of the structure. This is usually the first box you’ll encounter when approaching from the road.
- Fuze Box 2 – Inner Courtyard (Second Floor): Enter the fort and climb the first staircase. You’ll find this fuze box along the second-floor courtyard, near a metal cart and open scaffolding.
- Fuze Box 3 – Top Level / Tower Ladder: The final box sits inside the fort’s tower, beside the ladder leading to the rooftop. It’s illuminated by faint blue light when you’re carrying a fuze battery.
Once all three are powered, return to the cellar door near the western base of the fort to access your reward.
All Fuze Battery (Power Cell) Spawn Locations
Batteries spawn randomly on wooden pallets placed throughout and around the fort. Only three will appear per match, but their spawn spots are drawn from a pool of about 10–12 possible locations.
Here’s every known and confirmed spawn point:
- Derelict House (West of Fort) – Inside a ruined home with a leaning pole.
- South Wall Exterior – Near the first fuze box, on the ground beside sandbags.
- Crashed Car Area (Southwest) – Just right of the second location, beside a white rusted car.
- Radio Dish Ruin (East) – In a small broken house containing radio dishes and a generator.
- Zipline Shack (Northeast) – Beside the zipline tower on a wooden pallet.
- Shelved Ruin (Far Northeast) – Inside a collapsed building with shelves and a sofa.
- Roadside Pallet (West Road) – Along the main road west of the fort, near two traffic cones.
- Collapsed Home (West End) – Beyond a fallen pole, beside a broken wall.
- Northwest Corner Pallet – At the fort’s northwest edge near a cluster of debris.
- Locker Room (Inside Fort) – In a dark interior room with a hole in the ceiling.
- Antenna Roof (Top of Fort) – On the rooftop near a large antenna beside the final fuze box.
- (Occasional) Broken Earth Route – North road between the fort and Broken Earth POI.
If none of these spots hold a battery, double-check the pallet markers; they remain visible even when a battery doesn’t spawn there.
Step-by-Step: How to Open the Cellar Door
- Locate the Ancient Fort at the southern end of the Blue Gate map.
- Scout the area for batteries by checking the ruins listed above. Look for wooden pallets—they’re your best indicators.
- Carry one battery at a time to the fort’s fuze boxes.
- You’ll move slower and can’t fire weapons while holding it.
- Place the first battery in the south wall box, then proceed inside.
- Insert the second and third batteries into the courtyard and rooftop boxes.
- Once all three are powered, return to the cellar door beside the western base—it should now unlock automatically.
- Loot the basement, which contains:
- Weapon cases
- Electrical components
- Medical items
- Coin caches and other high-value loot
Before extracting, store rare items in your Safe Pocket to auto-extract them even if you’re defeated.
Tips for Solo and Team Runs
- Use Stealth: ARC patrols (Hornets, Wasps, and Snitches) roam nearby. Eliminate them quietly before carrying batteries.
- Mark Fuze Boxes: Place map pings for quick navigation between runs.
- Team Division: In squads, assign one player to each sector—west, north, and east ruins—to locate batteries faster.
- Follow the Cables: If lost, trace the black cables from the cellar door—they lead directly to the fuze boxes.
- Loot Fast: Once the door opens, grab your loot and extract quickly; Raiders often camp this area.
Rewards and Value
The Ancient Fort cellar consistently spawns weapon cases, rare crafting materials, and Advanced Electrical Components—ideal for improving your loadout or upgrading gear tiers. It’s one of the most profitable puzzle sites in Blue Gate, alongside Raider’s Refuge and Reinforced Reception. Play Now!
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