Underground Bunkers
Randomly generated bunkers hidden within your worlds
About this Mod
Underground Bunkers creates procedurally generated abandoned shelters within your worlds. These dungeons can be found in the overworld and may contain all kinds of loot, as well as enemies and traps.
This mod was created for an upcoming survival modpack.
Available versions
1.19.2
1.19.3
1.19.4
1.20
1.20.1
1.20.2
1.20.3
1.20.4
Future additions may include modded cross compatibilities (particularly tech mods and Create).
Screenshots
* All pictures taken using Rethinking Voxels shaders.
FAQ
Can I use this mod server-side only?
Yes
Is this compatible with other structure mods?
Yes
The latest version is 1.20.4, can I use it on previous versions?
Yes, we support all sub-versions from 1.19.2 to 1.20.4.
Available Versions
How to Install Underground Bunkers on Your Server
Order Server
Order a Minecraft Java server with at least 4 GB RAM (6 GB recommended).
Set fabric Loader
In the panel under "Egg", select the fabric loader and matching Minecraft version (1.21.1).
Install Mod
Open the mod browser in the dashboard and search for "Underground Bunkers". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.
Compatibility
Mod Loaders
Minecraft Versions
1.21.1, 1.21, 1.20.6 (+9 more)
Server-side
✓ RequiredRecommended RAM
6 GB(min. 4 GB)Frequently Asked Questions
Underground Bunkers server crashes on startup – what to do?
Most common cause: wrong fabric version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 4 GB RAM is allocated and the loader matches the mod version (1.21.1). You can switch loaders with one click in the panel.
Is Underground Bunkers compatible with fabric and forge and neoforge?
Underground Bunkers officially supports fabric, forge, neoforge for Minecraft 1.21.1, 1.21, 1.20.6. Note: Forge and Fabric mods are NOT cross-compatible – pick one loader and stick with it. The Mado dashboard automatically detects incompatible loader combinations.
Server lagging with Underground Bunkers – how to optimize performance?
Recommended RAM: 6 GB (per 5 players). Use /spark profiler to check if Underground Bunkers 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.
Similar Mods
Rent Modded Server
Install Underground Bunkers with just one click on your server.