Area 10 of 13

Sluice Gate and Sewers walkthrough

What to do in Sluice Gate and Sewers: 2 puzzles, 2 boss fights and 6 collectibles.

Updated October 28, 2026·By the Silver Pines Guide team·How we write guides

Route summary

Heavy Mechanical Cog (manhole key route), crank handle, three flow-control valves
Valve B poison boss
The Sheriff button-prompt fight gives .44 Magnum and Bell E.

Puzzles and codes

Sluice gate

Install Heavy Mechanical Cog and crank, connect gears into one chain, set gears to bottom, turn crank.

Flow control valves1467

Activate A, C, B (lockbox 1467); set all three pressure wheels to max, step back since the door blasts open.

Boss fights

Sewers Valve B poison boss

Constant poison aura; kite with ranged weapons, cleanse with antidote. Save before entering code 1467. North Star shotgun + slugs from Quiet Hour Cafe helps.

Reward: none confirmed

The Sheriff

Button-prompt fight: he pins and chokes you; follow on-screen prompts to throw him off. No weapon.

Reward: Cable Station Bell E, .44 Magnum

Tip: save at a payphone (it costs a coin) before every boss and before solving a puzzle that opens a new area.

Sewers collectibles

0 / 6 found · 0%

Mementos · 0/3

Faceless CoinCharged melee +20%Silver Gazette back room via sewer wall
Rusted Spur+10% ranged dmg, more recoilSewer under Apartment Street, behind door 1329 wall
Driftwood StakeSlashing +15%End of Riverside sewer

Vessel Shards · 0/1

Vessel Shard 2Downtown - top of sluice gate maintenance structure

Maps · 0/1

Sewers MapSewers: Just past entrance (crowbar)

Cable Station Bells · 0/1

Cable Station Bell EDropped by The Sheriff in the chamber behind the sealed sewer hatch.

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Every fight in order with drops.

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Every safe, door and phone code.

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Track mementos, shards and more.