Compact green-card monument. Quick puzzle, Blue Keycard reward, early-wipe favourite.
Entry-level puzzle monuments. A single green keycard and one fuse opens the loot room. Low or no scientist presence, low radiation, and component / mid-tier loot perfect for early wipe.
| Keycards | 1× Green (puzzle uses Green; reward is a Blue Keycard) |
|---|---|
| Fuses required | 1 |
| Scientists / NPCs | 0 |
| Radiation | Low |
| Recycler | Yes (×1) |
| Workbench | None |
Sewer Branch is the smallest of the green-card Tier 1 puzzle monuments — a compact, partly-underground structure with a single recycler and a quick puzzle. The puzzle reward is a Blue Keycard plus mid-tier crate loot. Total clear time under three minutes for a solo player. Lowest contention of the green-card monuments — many wipe-day routes lead with Sewer Branch as a warm-up before harder monuments.
Sewer Branch's puzzle is one of the simplest in the game:
Watch for low ceilings and tight corners — Sewer Branch's underground sections are claustrophobic and other players camping the exit have a clear line on you.
A single green keycard plus one electrical fuse. The puzzle reward is a Blue Keycard.
Compact — the surface monument is small, with a partially-underground tunnel network. Total clear time is under 3 minutes for a solo.
Low — basic radiation in the deeper tunnels. Standard clothing offers enough protection; full hazmat is overkill.
No — Sewer Branch is unguarded.
Yes for the fast clear and the Blue Keycard reward, even though the absolute loot is the lowest of the green-card monuments. Pair it with The Dome, Small Harbor or Satellite Dish for a full green-card route.
Sewer Branch's appeal is its speed. With the lowest clear time and the lowest contention of the green-card monuments, it's the natural opener for a wipe-day route — get a green card from a barrel or basic crate, run Sewer Branch in 3 minutes, recycle the loot on-site, and use the resulting scrap and components to fund the rest of your route through Small Harbor, Satellite Dish and The Dome.
The downside is a lower loot ceiling than the other green-card monuments. The single Elite Crate is the same, but the surrounding crate density is the lowest of the tier. For pure-EV reasons, Large Harbor and Dome both rank higher per-card; Sewer Branch wins on speed and accessibility.
If you're new to Rust monuments, Sewer Branch is a good first puzzle to learn — you can mess up the fuse box / keycard order without getting punished by scientists or radiation. After two or three Sewer Branch runs you'll know the green-card puzzle pattern, which generalises to every other green-card monument.
For the full progression chain, see the Monuments hub. For raid math on the components you'll farm here, the Raid Calculator covers the explosive economy.