Calamity Biomes

A biome add-on for MC Calamity

14.5K Downloads

datapackfabricforgeneoforgequiltadventureworldgen

About this Mod

Biomes aren't able to be removed from your world so we've separated the biomes from the Calamity MC pack so that you're not forced to deal with that

Biomes Added:

Sunken Sea
Underground Desert

Available Versions

Sunken update for 1.21.4release

MC 1.21.4fabric, forge, neoforge, quilt

May 17, 2025

Sunken update for 1.21.4release

MC 1.21.4datapack

May 17, 2025

The Sunken Update for 1.21.3release

MC 1.21.2, 1.21.3fabric, forge, neoforge, quilt

March 24, 2025

The Sunken Update for 1.21.3release

MC 1.21.2, 1.21.3datapack

March 24, 2025

The Sunken Update Hotfixesrelease

MC 1.21, 1.21.1fabric, forge, neoforge, quilt

March 20, 2025

How to Install Calamity Biomes on Your Server

Order Server

Order a Minecraft Java server with at least 4 GB RAM (6 GB recommended).

Set datapack Loader

In the panel under "Egg", select the datapack loader and matching Minecraft version (1.21.4).

Install Mod

Open the mod browser in the dashboard and search for "Calamity Biomes". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.

Compatibility

Mod Loaders

datapackfabricforgeneoforgequilt

Minecraft Versions

1.21.4, 1.21.3, 1.21.2 (+2 more)

Server-side

✓ Required

Recommended RAM

6 GB(min. 4 GB)

Frequently Asked Questions

Calamity Biomes server crashes on startup – what to do?

Most common cause: wrong datapack 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 (1.21.4). You can switch loaders with one click in the panel.

Is Calamity Biomes compatible with datapack and fabric and forge and neoforge and quilt?

Calamity Biomes officially supports datapack, fabric, forge, neoforge, quilt for Minecraft 1.21.4, 1.21.3, 1.21.2. 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 Calamity Biomes – how to optimize performance?

Recommended RAM: 6 GB (per 5 players). Use /spark profiler to check if Calamity Biomes 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.