The Undergarden

The Undergarden

Deep underground, a forgotten land awaits.

by
2.8M Downloads
forgeneoforgeadventureequipmentworldgen
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Screenshots

Indigo Mushroom Bog
Ink Mushroom Bog
Denizens
The Depths
Catacombs Entrance
Smogstem Forest

About this Mod

Undergarden Logo

Deep underground, a forgotten land awaits.

Discord: https://discord.gg/zrnMPDM

What is the Undergarden?

The Undergarden is a dark, subterranean world located deep below the bedrock of the Overworld. The flora here has adapted to their conditions and can grow anywhere, independent of light. Strange creatures call these dark lands home, and are plagued by the invasive Rotspawn, monsters originating from a chaotic, mysterious realm.

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Features

  • A whole new dimension to explore, build, and survive in

  • Over 10 unique entities

  • 15 biomes

  • Ores that have special properties when made into tools and weapons

  • Over 10 music tracks

  • Over 10 advancements to guide you on your journey

  • 4 special potion effects

  • 1 dungeon

And more to come in the future...

How to enter the Undergarden

To enter the Undergarden, you must first craft a Catalyst.
You can craft a Catalyst using the recipe below:

Catalyst Recipe

Once you have made that, create a frame in the shape of a Nether portal using Stone Bricks or Deepslate Bricks. Activate the Undergarden portal by right clicking the inner bottom of the frame with the Catalyst.

Activated Undergarden Portal

You can also use bricks derived from the Undergarden to create the portal.

Available Versions

The Undergarden 0.9.7beta
MC 26.1.2neoforge
July 14, 2026
The Undergarden 0.9.6beta
MC 1.21.1neoforge
April 2, 2026
The Undergarden 0.9.5beta
MC 1.21.1neoforge
March 18, 2026
The Undergarden 0.9.4beta
MC 1.21.1neoforge
December 23, 2025
The Undergarden 0.9.3beta
MC 1.21.1neoforge
June 23, 2025

How to Install The Undergarden on Your Server

1

Order Server

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

2

Set forge Loader

In the panel under "Egg", select the forge loader and matching Minecraft version (26.1.2).

3

Install Mod

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

Compatibility

Mod Loaders

forgeneoforge

Minecraft Versions

26.1.2, 1.21.1, 1.21 (+3 more)

Server-side

Required

Recommended RAM

6 GB(min. 4 GB)

Frequently Asked Questions

The Undergarden server crashes on startup – what to do?

Most common cause: wrong forge 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 (26.1.2). You can switch loaders with one click in the panel.

Is The Undergarden compatible with forge and neoforge?

The Undergarden officially supports forge, neoforge for Minecraft 26.1.2, 1.21.1, 1.21. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with The Undergarden – how to optimize performance?

Recommended RAM: 6 GB (per 5 players). Use /spark profiler to check if The Undergarden 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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Recommended RAM
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Details

License
LicenseRef-All-Rights-Reserved
Server-side
Required

Supported Versions

26.1.21.21.11.211.20.61.20.41.20.1