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Players who visited The Blue Gate map could encounter a ruined fortress called the Ancient Fort ARC Raiders. This desolate remnant of humanity stands on a hill, and at its base you'll discover a locked cellar door that contains some of the highest value loot on the map. However, to unlock the door to the cellar, players will need to find three detonators scattered around the ancient fortress. This guide will help you find all the fuses and open the door in no time.
How to complete the Ancient Fort puzzle in ARC Raiders
Players can find an ancient fortress at the southernmost part of the Blue Gate map in ARC Raiders. The area is medium value loot, so expect contact with other raiders in the area along with moderate ARC machine activity. Upon arriving in the area, you will find a locked door to the cellar of the Ancient Keep at the base of the west wall. There will be three bulbs on it, similar to the one found in Raider's Refuge.
To open the cellar door, you have to do this find three fuses/cells scattered around and within the fort. Players will have to pick them up and insert them into three detonators found in the ancient fortress. Here is a breakdown of fuse locations.
- Lighter 1: Located at the foot of the southern wall of the Ancient Fort, on the exterior.
- Lighter 2: I found only the first stairs inside the fortress, in the courtyard on the second floor.
- Lighter 3: Located inside the main fortress building on the second floor, next to the ladder used to reach the top.
All Ancient Fort Fuze locations in ARC Raiders
They exist over 10 places around the Ancient Fort where fusion cells can spawn. Players will find wooden pallets in these places, as a fuel cell will appear on them. Here is a breakdown of all the detonator/battery locations in the ancient fortress ARC Raiders.
There may be multiple spawn locations for cell fusions, but the ones mentioned below are some of the most common ones in and around the Ancient Fort.
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Image of Fuze location |
Location description |
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|---|---|---|
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Fusion 1 |
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We begin by listing the locations of the detonators from the western side of the ancient fortress ARC Raiders. Look to the west of the fort, to an abandoned house with a pole inside. |
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Fusion 2 |
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Another igniter/battery location for the Ancient Fort is just across from the outer igniter box on the south side. |
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Fusion 3 |
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Another potential Ancient Fort detonator/battery location is just to the right of detonator 2 location, next to the totaled car. |
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Fusion 4 |
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Check the area east of the fort. Inside the broken structure of the house with radio dishes and a generator, you can find another detonator. |
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Fusion 5 |
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Next, head to the northeast edge of the ancient fortress. Look inside the broken structure of the house next to the zipline to potentially find another ancient fortress fuse location ARC Raiders. |
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Fusion 6 |
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Head further northeast, across from the fifth fuze, to find another destroyed house with shelves and a couch. Inside is a wooden pallet that can cause a detonator for an ancient fortress. |
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Fusion 7 |
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Head further west down the road from the sixth fire location to find a wooden pallet with two traffic cones on it. This is another place where fuze can breed. |
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Fusion 8 |
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Continue west along the road past a fallen pillar to spot another broken house structure. Outside the house is a wooden pallet that can spawn one of the ignition cells for the ancient fort in ARC Raiders. |
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Fusion 9 |
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Head to the northwest edge of the ancient fortress to find one of the incendiary cells on the wooden pallets. |
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Fusion 10 |
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Head to the ancient fortress, take a right from the first staircase and enter the room with the hole in the ceiling. There is a wooden pallet near the lockers that can cause one of the energy cells/detonators. |
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Fusion 11 |
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Head to the top of the Ancient Fort in ARC Raiders using the ladder near the third incendiary box to find a wooden pallet next to a large antenna. It can also spawn fuses to complete the Ancient Fort puzzle. |
Once you find all three incendiary cells, you can put them in the three incendiary boxes and open the door to the Ancient Fort basement. ARC Raiders and complete his puzzle. It has a weapon case and several lootable areas such as drawers, cabinets and metal panels that will give you high value loot.
Just make sure you wrap up your loot quickly and get to the nearest extract to avoid getting jumped by an enemy player. Just to be on the safe side, you should store your most valuable item in a safe pocket to ensure it is automatically removed in case your raider drops out. ARC Raiders.
- Released
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October 30, 2025
- ESRB
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Teen / Violence, Blood
