City of Chambers
City of Chambers adds a large flying fortress structure to the world, built around a series of trial chambers at several levels.
What it does
The structure resembles an End City, floating in the air and holding a stack of floors, each with its own themed trial chamber and its own mobs and challenges. Players climb through the levels to reach the top, where clearing the tower yields a reward of two maces. Each floor is laid out differently, so the route through the tower does not repeat from one level to the next.
The mod changes only the trial chamber design, leaving other vanilla generation as it is. It is meant for players who want a challenging adventure at the end of a survival run. Mobs such as bogged and breeze appear in the tower alongside Minecraft's standard enemies.
City of Chambers is published for Fabric and NeoForge across four game versions: 1.21.1, 1.21.4, 1.21.5 and 1.21.8, with 1.0.13 for 1.21.8 as the latest file. Installation covers the server and each player's game. The code is not open source; it is released under All rights reserved.
Key features
Flying fortress structure
A floating structure generates in the world, shaped after an End City and filled with unique rooms.
Multi-level tower
The tower has several floors, each a trial chamber with its own theme, mobs and challenges.
Tower reward
Clearing the top of the tower gives the player two maces.
Modified trial chambers
Only the trial chamber layouts are changed, while the rest of the world generation stays vanilla.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
How it compares
Hellish Trials is a Fabric and NeoForge mod for 1.21 – 1.21.2, licensed All rights reserved and not open source. Not Enough Trials is server-required with optional client support, covering Fabric, Forge and NeoForge for 1.21 – 26.2 under the MIT License, not open source. Cobblemon Trials Edition is a client and server mod for 1.21.1 that is open source under the MIT License.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| City of Chambers | Fabric and NeoForge | 1.21.1 – 1.21.8 | Client and server | 2025-12-07 |
| Hellish Trials | Fabric and NeoForge | 1.21 – 1.21.2 | Not published | 2026-01-11 |
| Not Enough Trials | Fabric, Forge and NeoForge | 1.21 – 26.2 | Server required, client optional | 2026-06-17 |
| Cobblemon Trials Edition | Fabric and NeoForge | 1.21.1 | Client and server | 2026-09-06 |
Questions
Does City of Chambers need to be installed on the server?
Which loaders does City of Chambers support?
Which game versions have files for City of Chambers?
In the catalog
City of Chambers is one of 8,515 World generation mods on ModsFinder, and one of 4,027 World generation mods for Fabric. 17,695 mods support Minecraft 1.21.8.
More from SmartStreamLabs
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What the author says
Explore the City of Chambers, a mysterious big structure brimming with trials, treasures, Inspired by the iconic End Cities, the City of Chambers is a fortress-like structure filled with unique rooms, and rewarding challenges designed to test even the bravest adventurers. Multi-Level Tower: The city consists of…
Official listing
- Modrinth page
- modrinth.com/mod/city-of-chambers
- Owner
- SmartStreamLabs
- Published
- 2025-12-07
- Updated on Modrinth
- 2025-12-07
- Facts verified
- 2026-10-15