CurseForge · Minecraft mod
Underground Worlds
Adds underground biomes and underground dungeons, as well as some above ground structures, in a modular and configurable way.
Quick answer
Which Underground Worlds release matches 26.2 Forge?
Underground Worlds UndergroundWorlds - Forge - 3.2.1 - 26.2 targets 26.2 with Forge. The project page does not say whether this file belongs on the client, dedicated server, or both. No extra mods listed for this file.
Where it goes
Is Underground Worlds required on the client, server, or both?
The project page does not say whether this file belongs on the client, dedicated server, or both.
The source does not explicitly classify this release as client-only or server-only.
What else does Underground Worlds UndergroundWorlds - Forge - 3.2.1 - 26.2 need?
UndergroundWorlds - Forge - 3.2.1 - 26.2 on 26.2 Forge. Every mod below is checked against that same setup.
This file does not list any required mods. Do not add a library just because a different file uses it.
We only count dependency files that match this setup. A file for another loader does not fill the gap.
Before you install it
Add Underground Worlds without breaking your instance.
Built for Underground Worlds UndergroundWorlds - Forge - 3.2.1 - 26.2 on 26.2 Forge. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use UndergroundWorlds - Forge - 3.2.1 - 26.2. It targets 26.2 with Forge; another release may have different loader, side or dependency requirements.
- 02
Bring the mods it needs
This file does not list any required mods. Do not add a library just because a different file uses it.
- 03
Put it on the correct side
The project page does not say whether this file belongs on the client, dedicated server, or both.
- 04
Pick the file you checked
Use the “Get this file” button beside UndergroundWorlds - Forge - 3.2.1 - 26.2. It opens that exact file at the source.
About this project
What does Underground Worlds add?

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.

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.
Project description from CurseForge.
Pick your setup
Underground Worlds by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
26.2
3 loader builds26.1.2
3 loader builds26.1.1
3 loader builds26.1
3 loader builds1.21.10
3 loader builds1.21.8
3 loader builds1.21.4
3 loader builds1.21.1
3 loader builds1.20.3
2 loader builds1.20.1
2 loader buildsCheck the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
Underground Worlds versions and loaders
UndergroundWorlds - Forge - 3.2.1 - 26.2
undergroundworlds-forge-3.2.1-26.2.jar
2 Sept 2026
UndergroundWorlds - Forge - 3.2 - 26.2
undergroundworlds-forge-3.2-26.2.jar
28 Aug 2026
Looking for an older file? The official CurseForge project page is in Resources.