The Backrooms - Cubliminal
The Backrooms - Cubliminal sends players into infinitely generated dimensions where sanity drains over time and the layout shifts, with custom blocks, items and effects added to the vanilla game.
What it does
The mod generates a series of backrooms levels that players can enter and explore. Level 0 includes the Redrooms and the Manila Room, and further levels are added on top of those. Sanity is shown as a bar: it begins to drain soon after arrival, and it falls faster in certain areas, such as the Redrooms. Once sanity drops low enough, the paranoia status effect makes vision confusing and eventually damages the player. Sanity can be restored by drinking almond water in certain levels, or by staying inside the Manila Room, and dying resets it.
Once a player has entered the Manila Room, the mod also allows passing through walls: the player runs into a wall and holds that for a couple of seconds, then drops into the right dimension, and the timer for this state starts over. The mod is open source under the GNU General Public License v3.0 or later. It runs on Fabric for 1.21.3 with Fabric API required and Mod Menu optional, and it is needed on both the server and every player's client.
Key features
Infinite backrooms dimensions
Dimensions are generated without end, with rooms, corridors and an exit door that has to be found in each level.
Sanity system
A sanity bar drains over time and faster in dangerous areas, and staying still in dark places or sleeping for several days can also affect it.
Custom blocks and items
Wallpapers, variants, decorations and a gateway block are added, along with weapons, almond water and silver ingots found in buried treasure chests.
Overlays and effects
Screen overlays, shaders, reverb and renderer effects, along with the paranoia status effect, shape how the backrooms feel.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Requirements
Dependencies declared by the latest file for each loader.
Required 1
Optional 1
How it compares
Backrooms Through The Walls is a Fabric mod for 1.21.1 under All rights reserved, not open source. Sanity Level is an open source Fabric mod under the MIT License for 1.21 – 1.21.11. Vanilla Backrooms is open source under the GNU General Public License v3.0 only, runs on Fabric and Quilt for 1.21.8 – 1.21.11, and is server-side only, so players join without installing it.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| The Backrooms - Cubliminal | Fabric | 1.21.3 | Client and server | 2024-12-15 |
| Backrooms Through The Walls | Fabric | 1.21.1 | Client and server | 2025-12-05 |
| Sanity Level | Fabric | 1.21 – 1.21.11 | Client and server | 2026-08-07 |
| Vanilla Backrooms | Fabric and Quilt | 1.21.8 – 1.21.11 | Server-side only | 2026-03-26 |
Questions
Does The Backrooms - Cubliminal need Fabric API?
Do players and the server both need the mod?
Is Mod Menu needed?
Which game version does the mod support?
In the catalog
The Backrooms - Cubliminal is one of 8,515 World generation mods on ModsFinder, and one of 4,027 World generation mods for Fabric. 13,252 mods support Minecraft 1.21.3.
Similar mods
What the author says
At the same time, silver ingots can be found inside buried treasure chests. ### Sanity Right after your arrival to the backrooms, your sanity will start draining. If your sanity gets too low, you'll get the paranoia status effect, which makes your vision confusing and eventually damages you. Sanity will decrease…
Official listing
- Modrinth page
- modrinth.com/mod/cubliminal-mod
- Owner
- Cubliminal Team
- Published
- 2024-11-27
- Updated on Modrinth
- 2024-12-15
- Facts verified
- 2026-10-15