There’s a locked sewer tunnel that you can stumble across in Slatten Dale, the first region of Atomfall. It’s not too difficult to find a way into the sewers, but once you do, there will be two locked doors waiting for you inside. One leads to the Control Room, while the other is the entrance to the Maintenance Room. Unfortunately, no matter how hard you look, there doesn’t seem to be a way into either room within the sewers.
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There is a way to unlock these doors and fully open up the sewers, but it’s going to take a bit of exploration to find it. You’re going to need to get into the Control Room, find the Sewer Tunnel Key, and then you can loot the goods inside the Maintenance Room.
How To Enter The Sewer Tunnels In Atomfall
The Sewer Tunnels can be located in Slatten Dale at the coordinates 24.7 E, 78.2 N on the map. When you find the entrance, it’ll be locked with a note titled “Yours For A Fair Price!” next to it. This note will reveal that a nearby trader named Molly Jowett has the key that will unlock the sewers. She can be found at the coordinates 26.4 E, 79.1 N on the map. You can either trade with her for the key, or kill her in cold blood and loot it off her corpse.
If you don’t feel like trading with or murdering Molly, there’s a storm drain located at the coordinates 28.0 E, 79.4 N that will also take you into the Sewer Tunnels.
Once you’re in the sewers, you’ll see signs on the wall that will lead you to different locations. You can find shortcuts leading to Casterfell Woods and Wyndham Village. There will also be signs pointing to both the locked Control Room and Maintenance Room. Watch out for the druids wandering around the sewers, and then follow the signs to Casterfell Woods.
How To Find The Sewer Tunnel Key In Atomfall
As you exit out into Casterfell Woods, head forward while avoiding or fighting the druids in the area. You’ll see one of the red telephone booths that are scattered about the quarantine zone. Head past that and take the path on the right. It’ll lead you up the cliffside. Keep going up until you’re on the ruined overpass above.
Head south down this road all the way to the end. You’ll likely run into more druids, so be prepared for a fight. Once you reach the end, you’ll see an old gas station. On the right will be the back way into the Druids’ Camp. On the left will be the back entrance to the Sewer Tunnels. This will be at the coordinates 23.4 E, 83.6 N on the map.
When you enter the Sewer Tunnels and head forward, you’ll end up inside the Control Room. Go up the stairs to your right, and you’ll find a corpse at the back next to a desk. Loot the corpse to find the Sewer Tunnel Key.
You can unlock the deadbolt on the Control Room door and exit out into the Sewer Tunnels. Follow the signs to the Maintenance Room, and use the Sewer Tunnel Key on the door. Inside, there will be a variety of crafting materials for you to pick up. If you squeeze through a narrow passageway, you’ll also find a B.A.R.D. Crate with a Training Stimulant among other items inside.
6/10
- Released
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March 27, 2025
- ESRB
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Teen // Blood, Language, Violence
- Number of Players
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1
- Steam Deck Compatibility
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Unknown
- PC Release Date
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March 27, 2025