- Latest version
- 3.1.3-26.1
- Minecraft
- 1.19.4 to 26.1.2
- Java
- Java 25+
- Loaders
- NeoForge, Forge, Fabric
- Licence
- CC-BY-NC-ND-4.0
- Downloads
- 2.7M
- Updated
- 19 d ago
- Available on
- Modrinth
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.
| Minecraft | Through | Java | Evidence | Released |
|---|---|---|---|---|
| 26.1.2 | NeoForge, Forge, Fabric | 25+ | declared | 9 Apr 2026 |
| 26.1.1 | Fabric, NeoForge, Forge | 25+ | declared | 1 Apr 2026 |
| 26.1 | Forge, NeoForge, Fabric | 25+ | declared | 24 Mar 2026 |
| 1.21.10 | Forge, NeoForge, Fabric | 21+ | declared | 7 Oct 2025 |
| 1.21.8 | Forge, NeoForge, Fabric | 21+ | declared | 17 Jul 2025 |
| 1.21.4 | Fabric, Forge, NeoForge | 21+ | declared | 3 Dec 2024 |
| 1.21.1 | NeoForge, Forge, Fabric | 21+ | declared | 8 Aug 2024 |
| 1.20.4 | Fabric, NeoForge, Forge | 17+ | declared | 7 Dec 2023 |
| 1.20.3 | Fabric, NeoForge, Forge | 17+ | declared | 4 Dec 2023 |
| 1.20.2 | NeoForge, Forge, Fabric | 17+ | declared | 20 Sept 2023 |
| 1.20.1 | Fabric, NeoForge, Forge | 17+ | declared | 12 Jun 2023 |
| 1.19.4 | NeoForge, Forge, Fabric | 17+ | declared | 14 Mar 2023 |
Releases
Files come from the author's own host. We publish the checksum so you can prove the file you downloaded is the file they published.
- 3.1.3-26.1release9 Jul 202626.1, 26.1.1, 26.1.2
- 3.1.2-26.1release31 May 202626.1, 26.1.1, 26.1.2
- 3.0.2-1.21.10release31 May 20261.21.10
- 3.0.2-1.21.8release31 May 20261.21.8
- 3.0.2-1.21.4release31 May 20261.21.4
- 3.0.2-1.21.1release31 May 20261.21.1
- 3.1.1-26.1release24 May 202626.1, 26.1.1, 26.1.2
- 3.1-26.1release15 May 202626.1, 26.1.1, 26.1.2
- 3.0.1-1.21.10release7 Apr 20261.21.10
- 3.0.1-1.21.8release7 Apr 20261.21.8
Frequently asked
Does Underground Worlds work on Minecraft 26.1.2?
Yes. 26.1.2 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 26.1.2. 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 loader does Underground Worlds need?
NeoForge, Forge, Fabric. A build for one loader will not load on another, so this is the first thing to check before the Minecraft version.
Which Java version do I need for Underground Worlds?
Java 25 or newer, because that is what the newest Minecraft release it supports requires. The requirement comes from the game rather than from the mod itself.
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?
From the author's own page on Modrinth, which is where the data here is synced from. MCReference never mirrors, re-hosts or repackages a file: every download button points at the original source, so you get exactly what the author published.
Works on the same versions
Ordered by how much of the recent Minecraft version coverage overlaps, not by popularity.