
Caverooms
This project adds the Backrooms to Minecraft rd-132211 and rd-132328.
Screenshots

About this Mod
The Caverooms
About
This mod adds the Backrooms to ancient Minecraft versions.
You can enter the Backrooms by digging down, at some point, you'll fall right into them.
Compatibility
This mod was originally created for rd-132211, but it also works on rd-132328.
Installion
The mod is distributed as a ZIP file.
To install it using Betacraft:
- Install Betacraft,
- Launch either:
rd-132211 (pc-132011)
rd-132328 (pc-132128) - Open your Betacraft versions folder:
Documents/.betacraft/versions or
AppData/Roaming/.betacraft/versions - Locate the version's .jar file and open it as a ZIP archive (rename it to .zip from .jar if you have file extensions enabled and open via windows file explorer or use WinRar)
- Delete the META-INF folder
- Copy all files from caverooms.zip into the archive and overwrite
- When re-zipping, make sure you don’t zip the folder itself.
Instead, open the extracted folder and select the contents inside it (com/ and terrain.png), then compress those files directly into a ZIP. - Once done, launch the game.
To install it using Prism Launcher:
- Install Prism
- Create a new instance and select the rd-132211 game version,
- Go and edit the instance and under version, click 'Add to minecraft.jar', select the zip file
- And launch the game.
Community
If you want to discuss the mod, report issues, or suggest ideas, you can join my discord.
Available Versions
How to Install Caverooms on Your Server
Order Server
Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).
Set modloader Loader
In the panel under "Egg", select the modloader loader and matching Minecraft version (rd-132328).
Install Mod
Open the mod browser in the dashboard and search for "Caverooms". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.
Compatibility
Mod Loaders
Minecraft Versions
rd-132328, rd-132211
Server-side
✗ UnsupportedRecommended RAM
4 GB(min. 3 GB)Frequently Asked Questions
Caverooms server crashes on startup – what to do?
Most common cause: wrong modloader version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (rd-132328). You can switch loaders with one click in the panel.
Is Caverooms compatible with modloader?
Caverooms officially supports modloader for Minecraft rd-132328, rd-132211. The Mado dashboard automatically detects incompatible loader combinations.
Server lagging with Caverooms – how to optimize performance?
Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Caverooms consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.
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Rent Modded Server
Install Caverooms with just one click on your server.