Sewer Branch Puzzle Guide — Green Card Route

Sewer Branch trades Satellite Dish’s simplicity for a better payout. The circuit has one extra leg — the descent into the tunnels — but the loot room at the bottom is the richest in the green tier.

Before you go

Green keycard + one electric fuse. No radiation, no NPCs. A torch or flashlight helps in the tunnels; on a fresh wipe expect company — this monument is popular.

The route

1. Start at the red building. On the surface, find the red warehouse — the door may need to be opened from the correct side, so circle it if the front is shut.
2. Fuse and switch. Inside, place your electric fuse in the fuse box and flip the switch. The circuit down in the tunnels is now live.
3. Head underground. Take the tunnel entrance down and keep working left at the branches — the powered green reader is at the far end of the run.
4. Swipe the green reader. Card in, door open — remember the timer-and-durability rule: don’t linger with the door cycling.
5. Clear the loot room. 3+ crates and the blue keycard. Check every box and the tabletops; the card spawn point varies slightly within the room.

After the run

Recycle at the unit behind the red warehouse before you leave. And note the blue door in the underground section — that’s not part of this puzzle, it’s a bonus room for your next visit once you’re holding the blue card, with a second recycler behind it.