Source-checkedWorld generation

Underground Worlds

by HexagonNico · for Minecraft

Adds underground biomes and underground dungeons, as well as some above ground structures, in a modular and configurable way.

3.0MDownloads
2 mo agoLast updated
CC-BY-NC-ND-4.0License
Fabric · Forge +1Loaders

About Underground Worlds

From Modrinth

Adds underground biomes and underground dungeons, as well as some above ground structures, in a modular and configurable way.

Underground Worlds

Underground Worlds is a Minecraft mod that adds underground biomes and underground dungeons, as well as some above ground structures, in a modular and configurable way.

About

Underground Worlds was born as Underground Jungle, a mod that added an underground jungle biome and a jungle temple somewhat inspired by the one in Terraria.

When the development continued and more biomes were added, I decided it would have been better to put all biomes in the same mod and allow users to enable and disable features through config files instead of making a separate mod for each biome.

All biomes added by Underground Worlds can be enabled or disabled in the config. The config can also disable certain features for each biome.

Features

Underground Worlds adds new underground biomes and structures, each with their own set of features. Biomes and structures can have their exclusive mobs, set of tools, and other special items.

Main Cover Image

A full list of features can be found in the Wiki.

Additional information

When using Underground Worlds alongside other world generation mods, it may be necessary to use TerraBlender or Lithostitched for the biomes to generate in the world.

Main mod page

Modrinth: https://modrinth.com/mod/underground-worlds

Curseforge: https://www.curseforge.com/minecraft/mc-mods/underground-worlds

If you find this mod on other distribution platforms, these are NOT managed by me.

Credits

Mod Author: HexagonNico

Chiseled Temple Bricks texture by Matriax (CC-0)

Jungle bee model by FrostYieBoiy (CC-BY 4.0)

Wrapped model by Nightfoxy3D (CC-BY 4.0)

"Abbeyence" music by Spring (CC-BY 3.0)

Questions and answers

Q: Can I use this in my modpack?

A: Yes. You don't need to ask for permission. See License for details.

Q: Can you port this mod to 1.\d\d.\d?

A: I can, but remember that I'm a human being and porting the mod to another version requires additional effort to maintain each version. Please refrain from opening issues like "Port to 1.3.2 when".

Q: Can you translate this mod to ww_ww?

A: You can submit a pull request if you want to contribute!

License

This mod is licensed under Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International.

You are free to share, copy and redistribute this mod in any medium or format, including modpacks, adventure maps, and other creations made within Minecraft, as long as you respect the following conditions.

  • You must give appropriate credit.
  • You may not use the mod for commercial purposes.
  • If you create a modified version of this mod, you may not redistribute the modified version.

You are free to use this mod in any modpack, as long as you do not sell it via any means. You cannot re-upload this mod on other mod distribution platforms.

Highlights

From source data

Game versions

Supports 13 Minecraft versions, the newest being 26.2.

Loaders

Runs on Fabric, Forge and NeoForge.

Footprint

Rated a light load on a server.

Underground Worlds on Nxeon

From our catalogue
One-click install
Supported on Nxeon Minecraft servers. We download it from Modrinth, place it, and restart the server.
Server side
Required on the server
Server type needed
Fabric, Forge, NeoForge
Server load
light
Smallest plan we suggest
Minecraft — 2 GB (2 GB RAM). This follows our own load rating above, not a benchmark.
Latest build
3.2.1-26.1, released 2026-09-02

Game versions by loader

LoaderGame versionsNewest
Fabric26.1 to 26.2 (4 versions)26.2
NeoForge26.1 to 26.2 (4 versions)26.2
Forge26.226.2

From 5 recorded builds of Underground Worlds.

Recent builds

BuildReleasedGame versionsLoaders
3.2.1-26.12026-09-0226.2NeoForge
3.2.1-26.22026-09-0226.2Fabric
3.2.1-26.22026-09-0226.2Forge
3.2.1-26.12026-09-0226.1 to 26.1.2 (3 versions)NeoForge
3.2.1-26.12026-09-0226.1 to 26.1.2 (3 versions)Fabric

Run Underground Worlds on a Minecraft server

Pick a server or deploy a new one above; it is installed in one click.

What kind of mod it is

From the catalog
Listed on Modrinth as “Mods”

World generation

Changes or adds to how new terrain, biomes and structures are created.

Runs on your server

From source side support

Modrinth lists Underground Worlds as required on the server. Check its Modrinth page to see whether players need it too.

Compatibility

Game
Minecraft
Loaders
FabricForgeNeoForge
Runs on
Serverrequired on the server
Game versions
26.2 and 12 earlier

Verified at the source

  • ✓ModrinthOfficial listing, checked 2026-10-01Open ↗
  • ✓AuthorHexagonNico, as published on Modrinth
  • ✓LicenseCC-BY-NC-ND-4.0Free

Underground Worlds, answered

Generated from the mod’s own source data.

Do my players need to install Underground Worlds?

Modrinth lists Underground Worlds as required on the server. Check its Modrinth page to see whether players need it too.

Which loaders does it support?

Fabric, Forge and NeoForge.

Is it free?

Yes. Underground Worlds is free to download from Modrinth. Its license is CC-BY-NC-ND-4.0.

How do I add it to my Nxeon server?

Use “Add to a server” on this page, or open NxLabs from your dashboard. We install it, restart your server and switch it on.

NxLabs

Run Underground Worlds on a Minecraft server.

Deploy in about a minute from $4.99 a month, then add Underground Worlds in one click.