Fortress of Meropide in Genshin Impact 4.1 is an underwater prison located in the Liffey Region of Fontaine, where criminals are exiled as punishment for their crimes. See its location, how to unlock, map and areas, puzzles, and lore details here!

How to Unlock Fortress of Meropide

Use the Lift During Chapter 4, Act 3

You can enter the Fortress of Meropide through an elevator behind the Opera Epiclese during the Chapter 4: Act 3 Archon Quest!

Chapter 4: Act 3 Archon Quest Guide

Get Caught by the Tower's Searchlight

You can enter the Fortress of Meropide by entering the Searchlight's Detection Range in the underwater area of the Liffey Region. After staying in the Searchlight for too long, guards will detain you and take you inside the Fortress of Meropide.

Enter the Underwater Pipe

There is an underwater opening that leads to the Fortress of Meropide near the southern underwater waypoint in the Liffey Region. Simply enter the big pipe and get caught by an official on the way to enter the Fortress of Meropide!

Fortress of Meropide Location

Located on Liffey Region

You can find the Fortress of Meropide in the Liffey Region of Fontaine. Players will need to dive underwater to get to this underground location.

Fontaine Map Guide

Heavily Involved with 4.1 Archon Quest

During the 4.1 Livestream, it's revealed that the Fortress will be heavily involved with 3rd or 4th Acts of the Fontaine Story Quest. We'll update this section when more information has been revealed!

List of Archon Quests

Fortress of Meropide Map and Areas

The Fortress of Meropide's map has 6 Levels, each corresponding to a certain area within the Fortress. Despite being a massive prison with a maze-like structure, there are only four Waypoints inside the Fortress, and one of which is Hidden!

All Fortress of Meropide Levels

1. Reception Area
2. Dormitory Block
3. Administrative Area
4. Production Zone Upper Level
5. Production Zone Lower Level
6. Abandoned Production Zone

Reception Area

The upper-most level of the Fortress that we get to first visit only during the Archon Quest Chapter 4, Act 3. The lift from the Reception Area connects directly at the entrance behind the Opera Epiclese.

Dormitory Block

The Dormitory Block is the next level beneath the Reception Area, but it's technically part of the floor where the Administrative Area is located. The Dormitory Block also has the Administrative Area Waypoint, located south of the Fortress!

The Dormitory Block houses your cell, the Mail Room and Infirmary, and the Rift of Erosion.

Administrative Area

The Administrative Area is the floor below the Dormitory Block, which you can access by either teleporting to the Administrative Area Waypoint then jumping down, or by teleporting to using the Fortress icon in the minimap!

This area acts as the main hall of the entire Fortress, where notable areas like the Coupon Cafeteria, Rag and Bone Shop, Pankration Ring, and Wriothesley's Office are located!

Production Zone Upper Level

The Production Zone Upper Level is directly located below the Administrative Area, but it can only be reached through the lift from the Production Zone Lower Level!

Production Zone Lower Level

The Production Zone Lower Level has its own Waypoint to easily access it but, alternatively, you can use the lift in the Administrative Area located just past the Pankration Ring to get to this level.

Abandoned Production Zone

The Abandoned Production Zone is the lowest level of the Fortress, and is where the Drive Valve mechanism is located. This valve opens to four locations, and one of which, is the Geode Mine Shaft, where the hidden waypoint of the Fortress is located!

Do take note that you can only unlock the Geode Mine Shaft and its waypoint by doing the Unfinished Comedy Quest Line, specifically the Eye for an Eye subquest.

Eye for an Eye Quest Guide

Coupon Cafeteria

Like any other prison, the Fortress of Meropide provides meals to its inmates via the Coupon Cafeteria. Each inmate is entitled to one Welfare Meal a day, which includes a free meal and a fortune slip.

With enough Credit Coupons, Travelers can purchase additional meals of their choice!

Rag and Bone Shop

The Fortress of Meropide also comes with a merchandise shop, Rag and Bone Shop, where Travelers can purchase a variety of items in exchange for Credit Coupons.

Some of these items can even be used to achieve victory in the Pankration!

Pankration Ring

The Pankration, or Pankration Ring, is an underground ring in the Fortress of Meropide that serves as its primary source of entertainment. It may be a place where Travelers can put their skills to the test!

Fortress of Meropide Puzzles

Energy Transfer Terminals

The Fortress of Meropide is not without its own share of tricky and mind-boggling puzzles and mechanisms! Within the Fortress lies several Energy Transfer Terminals and Cipher Codes to test your puzzle solving prowess!

Energy Transfer Terminal Puzzle Guide

Drive Valve and Drivetrains

The Drive Valve mechanism is also a puzzle to solve within the Fortress, located in the Abandoned Production Zone! Its most notable use is during the Unfinished Comedy Quest Line!

Unfinished Comedy Quest Guide

Fortress of Meropide Quests

Fortress of Meropide Archon Quests

Fontaine Chapter 4 Archon Quests
Act 3: To the Stars Shining in the Depths	Act 4: Cataclysm's Quickening

Fortress of Meropide World Quests

Unfinished Comedy Quest Chain
Game of the Rich	An Eye for an Eye
Hereafter...
Scenes From Life in Meropide Quests
Safe Operation	Dead End
Fists of Fury	A Raw Deal
Treat the Symptoms	Chit-Chat
Unfinished Task	The Art of Negotiation
Every Debt Has a Creditor	Visible Hands

Fortress of Meropide Lore Details

Governed by the Duke, Wriothesley

The administrator and warden of Fontaine's prison is none other than Wriothesley. It's said that the Duke protects the weak while keeping the exiled troublemakers at bay with his intimidating looks and powerful fists.

After getting into power, Wriothesley introduced new reforms to the prison, which created communities and culture amongst the convicts.

Wriothesley Character Guide

The Exiles' Life and Work

The Fortress is not just a prison but also a growing community of exiled criminals. They work through labor to get supplies, buy from shops, and facilitate busy work while imprisoned.

Fontaine's Largest Clockwork Meka Manufacturer

Apart from serving as housing for Fontaine's convicts, the Fortress of Meropide is also where the majority of Fontaine's Clockwork Mekas are created.

Draws Inspiration from Steampunk Aspects

Inspired by the steampunk aesthetic, the prison is filled with bending pipes and steel to give a sense of the soltitude and bleak lifestyle of the Fontaine criminals.

Genshin Impact Related Guides

Version 4.1 Release Date and Patch Notes

Genshin Impact 4.1 Highlights

4.1 News Guides
Everything in 4.1	4.1 Livestream
4.1 Livestream Codes	2023 Third Anniversary
Version Pre-Install	Version Maintenance
Adventure Encounters	Top-Up Reset
Ascension Quest Updates
4.1 Characters
Neuvillette	Wriothesley
Hu Tao	Venti
4.1 Map
4.1 Map Expansion	Allogravity-Condensed Water Bodies
Fortress of Meropide	Liffey Region
4.1 Quests
Archon Quest Chapter 4: Act 3	Archon Quest Chapter 4: Act 4
Neuvillette Story Quest	Wriothesley Story Quest
4.1 Events
Waterborne Poetry	Radiant Harvest
The Peaks and Troughs of Life	Dodoco's Bomb-Tastic Adventure
Overflowing Mastery	Bathing in Flowing Moonlight Daily Login
4.1 Weapons
Cashflow Supervision (5★)	Tome of the Eternal Flow (5★)
The Dockhand's Assistant (4★)	Portable Power Saw (4★)
Prospector's Drill (4★)	Range Gauge (4★)
Ballad of the Boundless Blue (Event 4★)
4.1 Enemies
Experimental Field Generator	Millennial Pearl Seahorse
Fatui Frost Operative	Fatui Wind Operative
4.1 Items
Credit Coupons	Dandelion Bookmark