SpawnPass · Rust
Sewer Branch puzzle
Fuse box up top, green door deep in the tunnels — the darkest easy blue card on the map.
Last checked 2026-09-21
Overview
Sewer Branch is a green puzzle run mostly underground. Radiation is low enough for burlap, but the tunnels are unlit and the green door is more than twenty metres below the fuse box. Bring a light.
Insert the fuse in the top building
Start at the building beside the outdoor recycler, up on the high ground. Insert your Electric Fuse in the fuse box.
Flip the switch
The switch is a few metres away in the same building. Flip it — it powers both green doors in the monument.
Drop into the tunnels
Leave and get down into the sewer: drop into the large open pipe or take the ladder down. From here on it is dark — light on.
Swipe green underground
Follow the tunnel to the locked green door and swipe.
Take the blue card
Crates, the blue keycard and a blueprint fragment on the table. There is a second recycler down here if you want to break down what you found.
Climb out
Leave by a ladder or pipe exit. About half the surface crates here need no puzzle at all, so there may be players up top.
Optional: the second green door
The same fuse and switch power a second green door partway down, below the fuse building. It is another green room on the same circuit — worth a swipe if you have a spare card.