Menu

mod

Underground WorldsMinecraft mod for 26.2

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

client and servernewest supported release 26.2AdventureMobsEquipmentStorage
Latest version
3.2.1-26.1
Minecraft
1.19.4 to 26.2
Java
Java 25+
Loaders
NeoForge, Forge, Fabric
Licence
CC-BY-NC-ND-4.0
Downloads
2.9M
Updated
2 mo ago
Available on
Modrinth
Space NodeOur hosting

Host Underground Worlds servers

One click and Underground Worlds is installed with the right loader, on hardware built for it.

  • 26.2
  • NeoForge
  • Forge
  • Fabric
  • One click mod install
  • Loader matched for you
  • Ryzen CPUs
  • NVMe SSD
Deploy a serverFrom €0.90 per GB

Screenshots

Click a screenshot to open it. Screenshots are served from the author’s own host and belong to them.

Minecraft versions

Every version Underground Worlds declares support for, newest first, with the Java runtime that version needs.

Other mods
MinecraftThroughJavaEvidenceReleased
26.2NeoForge, Forge, Fabric25+declared16 Jun 2026
26.1.2Fabric, NeoForge, Forge25+declared9 Apr 2026
26.1.1Fabric, NeoForge, Forge25+declared1 Apr 2026
26.1NeoForge, Forge, Fabric25+declared24 Mar 2026
1.21.10Fabric, NeoForge, Forge21+declared7 Oct 2025
1.21.8Forge, NeoForge, Fabric21+declared17 Jul 2025
1.21.4Forge, Fabric, NeoForge21+declared3 Dec 2024
1.21.1NeoForge, Forge, Fabric21+declared8 Aug 2024
1.20.4Fabric, NeoForge, Forge17+declared7 Dec 2023
1.20.3Forge, NeoForge, Fabric17+declared4 Dec 2023
1.20.2Forge, NeoForge, Fabric17+declared20 Sept 2023
1.20.1Forge, NeoForge, Fabric17+declared12 Jun 2023
1.19.4Forge, NeoForge, Fabric17+declared14 Mar 2023

Download

From Underground Worlds’s own host. Nothing is re-hosted here.

For Minecraft 26.2

Choose the loader you use before downloading.

  • NeoForge

    3.2.1-26.1 · 2 Sept 2026 · undergroundworlds-neoforge-3.2.1-26.2.jar

    Get NeoForge

  • Fabric

    3.2.1-26.2 · 2 Sept 2026 · undergroundworlds-fabric-3.2.1-26.2.jar

    Get Fabric

Most recently published release

3.2.1-26.1release2 Sept 2026

undergroundworlds-neoforge-3.2.1-26.2.jar · 3.9 MB · for 26.2 · NeoForge

Download this release
2fb4df55bd49…
Older versions13

Dependencies

What Underground Worldsdeclares it needs, from the author’s own release metadata. A required one has to be installed alongside it or it will not load.

Fabric APIRequired. Lightweight and modular API providing common hooks and intercompatibility measures utilized by mods using the Fabric toolchain.Forge Config API PortRequired. NeoForge's & Forge's config systems provided to other modding ecosystems. Designed for a multiloader architecture.TerraBlenderOptional. A library mod for adding biomes in a simple and compatible manner!Curios APIOptional. A flexible and expandable accessory/equipment API for users and developers.LithostitchedOptional. Library mod with new configurability and compatibility enhancements for worldgenFriends&Foes (Fabric/Quilt)Optional. Adds outvoted and forgotten mobs from the mob vote, expanding on their original concepts and adding new vanilla-like features. The mod includes: Copper Golem, Crab, Glare, Moobloom, Iceologer, Rascal, Tuff Golem, Wildfire, Illusioner, Zombie HorseFriends&Foes (Forge/NeoForge)Optional. Adds outvoted and forgotten mobs from the mob vote, expanding on their original concepts and adding new vanilla-like features. The mod includes: Copper Golem, Crab, Glare, Moobloom, Iceologer, Rascal, Tuff Golem, Wildfire, Illusioner, Zombie HorseVariants&VenturesOptional. Adds multiple new mob variants seamlessly integrated into your Minecraft world.BiolithOptional. A biome placement mod focusing on configurability and consistent distribution of modded biomes

Frequently asked

Does Underground Worlds work on Minecraft 26.2?

Yes. 26.2 is the newest Minecraft version Underground Worlds declares support for, and the claim comes from the author's own release metadata rather than from a compatibility list somebody maintains by hand.

Which Minecraft versions does Underground Worlds support?

Everything the author has declared, from 1.19.4 up to 26.2. The full list is in the table above, with the Java runtime each version needs next to it.

Do I need to install Underground Worlds on the client or the server?

Both. Every player needs it installed and so does the server, so anyone joining without it will be refused.

Which platform or loader does Underground Worlds support?

NeoForge, Forge, Fabric. A build for one platform or loader will not necessarily load on another, so this is the first thing to check before the Minecraft version.

Which Java version do I need for Underground Worlds?

Among the supported Minecraft releases above, the highest recorded requirement is Java 25 or newer. Use the requirement for the exact Minecraft version you run; previews and snapshots may differ.

What does Underground Worlds need to run?

It declares Fabric API and Forge Config API Port as required, so those have to be installed alongside it or it will not load. Each one is linked in the dependencies section above.

What licence is Underground Worlds under?

CC-BY-NC-ND-4.0, as stated by the author on the platform we synced it from. Check the project's own page before redistributing or bundling it.

How do I install Underground Worlds?

Install the matching loader first, then put the downloaded file in your mods folder and start the game. The loader, the mod and Minecraft all have to be on the same version, which is the usual reason a mod does not appear in game.

Where do I download Underground Worlds safely?

Start with the author's page on Modrinth, which is where the data here is synced from. MCReference does not host or repackage files. When available, recorded download links go to the source for that release; verify the publisher, filename and any available checksum before running it.

Works on the same versions

Ordered by how much of the recent Minecraft version coverage overlaps, not by popularity.

GeckoLibA 3D animation library for entities, blocks, items, armor, and more!BookshelfAn open source library for other mods!Cloth Config API (Fabric/Forge/NeoForge)Config Screen API for MinecraftJourneyMapReal-time map used for mapping in-game or your browser as you explore.Architectury APIAn intermediary api aimed to ease developing multiplatform mods.Enchantment DescriptionsAdds in-game descriptions for enchantments to tooltips.

Details from Modrinth, where the author last updated it on 2 Sept 2026. We do not host files or republish descriptions. Available download links point to the author’s own release.

Is this information wrong or missing something? .