If you’re trying to get solid loot early on in Rust, the Sewer Branch is one of the best places to hit. It’s a low-tier monument with a simple puzzle, but if you don’t know the steps, you could end up wasting time—or worse, missing out on valuable gear. I’ve run this puzzle plenty of times, so let me walk you through it efficiently.
What You Need Before Entering Sewer Branch
Before you head to the Sewer Branch, you need a few things:
| Item | Why You Need It |
|---|---|
| Green Keycard | Required to open the puzzle room door. |
| Electric Fuse | Needed to power the door mechanism. |
| Radiation Protection | There’s mild radiation—burlap, wood armor, or a basic hazmat is recommended. |
| Flashlight/Torch (Optional) | The underground tunnel can be dark, so a light source helps. |
If you don’t have a Green Keycard yet, you can find one at gas stations, supermarkets, or fishing villages. You’ll need it to access the locked room in the puzzle.
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How to Find the Sewer Branch
The Sewer Branch is a small-to-medium-sized monument that’s easy to recognize. It’s usually near roads and has a rusted metal tower, a few broken buildings, and a set of large sewer pipes leading underground. If you open your in-game map, it’s marked clearly.
Things to Watch Out For
- Enemy Players – Sewer Branch is a common early-game loot run, so don’t assume you’re alone.
- Radiation Hotspots – Some areas, especially near the central silo, have higher radiation.
- Animals (Occasionally) – There’s a chance of running into a wolf or bear nearby.
Once you’ve secured the area and confirmed it’s safe, it’s time to start the puzzle.
How to Complete the Sewer Branch Puzzle
Step 1: Locate the Main Building
When you arrive, find the main building near the parking lot. It’s usually one of the tallest structures in the area. This is where you’ll insert the Electric Fuse to power the puzzle.
Step 2: Insert the Fuse
Inside the main building:
- Look for a fuse box mounted on the wall behind some electrical panels.
- Open it and insert the Electric Fuse.
Without the fuse, the keycard door won’t have power, and you won’t be able to continue.
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Step 3: Activate the Power Switch
Once the fuse is in place:
- Find the power switch nearby (it’s usually on a wall next to the fuse box).
- Flip it on to activate the door mechanisms.
Now, your Green Keycard door is powered and ready to be unlocked.
Step 4: Enter the Underground Sewer
- Exit the main building and head toward the sewer tunnels.
- Look for large, rusted pipes and a dark tunnel entrance leading underground.
- Walk inside—this is where the puzzle door is located.
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Step 5: Swipe Your Green Keycard
- Deep inside the sewer tunnel, you’ll come across a locked door with a keycard scanner.
- Swipe your Green Keycard to unlock the room.
Step 6: Loot the Room
Inside the puzzle room, you’ll find:
✅ A Blue Keycard on a desk under a spotlight.
✅ Military crates containing early-game loot.
✅ Scrap and components scattered throughout.
The Blue Keycard is the most valuable item here since it allows access to higher-tier monuments like the Airfield and Power Plant.
Additional Loot Spots in Sewer Branch
Aside from the puzzle loot, there are other places to check inside the monument:
- Recycler – Located near the parking lot; great for breaking down extra loot.
- Oil Refinery – Found underground; useful for turning crude oil into low-grade fuel.
- Random Barrels & Crates – Scattered throughout the area, offering scrap and components.
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Tips for Running Sewer Branch Efficiently
If you want to get in and out quickly without dying, here’s what I recommend:
- Stay Alert – The tunnels are tight spaces, perfect for ambushes. If you hear footsteps, prepare for a fight.
- Bring Extra Fuses – If you plan on running the puzzle multiple times, carrying a second Electric Fuse will save you a trip back.
- Leave Before PvP Picks Up – Sewer Branch isn’t a major monument, but once gunfire starts, other players may rush in looking for kills.
- Use the Recycler Before Leaving – If you have extra items like road signs or empty propane tanks, break them down for scrap before heading out.
Final Thoughts
The Sewer Branch puzzle is a quick, efficient way to get a Blue Keycard and some solid loot early in Rust. Once you memorize the route, you can complete it in just a few minutes, making it one of the best early-game runs.
If you’re playing on a high-population server, be extra cautious—other players will be running this puzzle too, and the tunnels make for easy ambush spots. But if you plan ahead, move fast, and know where to go, you’ll walk away with better gear every time.
FAQs
Yes, the Sewer Branch provides a blue keycard as a reward. You need to complete the puzzle by activating a fuse and using a green keycard. The blue keycard is found in an underground section.
You need one fuse to activate the power for the keycard room. Insert the fuse into the fuse box inside the main building. Then, flip the switch before heading underground to access the blue keycard.
A minimum of 10 radiation protection is recommended for safe navigation. Some areas have mild radiation, but it’s manageable with basic armor or a hazmat suit. Higher protection ensures no radiation damage.
Insert a fuse into the fuse box and turn on the switch inside the main building. Use a green keycard to open the underground door where the blue keycard is located. Be prepared for potential enemies in the tunnels.
