mod
OneBlockUltimaMinecraft mod for 1.12.2
This mod will give you a unique survival experience in a world where there is only one block. It adds a new type of "One Block" world that will regenerate whenever you break it.
- Latest version
- OneBlockUltima-forge-1.21.x-3.0.0-1b
- Minecraft
- 1.7.10 to 1.12.2
- Java
- Java 8+
- Loader
- Forge
- Licence
- not stated
- Downloads
- 343
- Updated
- 2 mo ago
- Available on
- CurseForge
Screenshots
Click a screenshot to open it. Screenshots are served from the author’s own host and belong to them.
Minecraft versions
Every version OneBlockUltima declares support for, newest first, with the Java runtime that version needs.
Download
From OneBlockUltima’s own host. Nothing is re-hosted here.
For Minecraft 1.12.2
Choose the loader you use before downloading.
- Get Forge
Forge
OneBlockUltima-forge-1.12.x-3.1.0 · 22 Aug 2026 · OneBlockUltima-forge-1.12.x-3.1.0.jar
Most recently published release
OneBlockUltima-forge-1.21.x-3.0.0-1b.jar · 0.7 MB · for 1.21.11, 1.21.10, 1.21.9, 1.21.8, 1.21.7 +7 more · Forge
c85eceae2148…Older versions9Hide older versions
- OneBlockUltima-forge-1.12.x-3.1.022 Aug 20261.12.2, 1.12.1, 1.120.6 MB
9262528ca7fe…Get - OneBlockUltima-forge-1.12.x-3.0.119 Aug 20261.12.2, 1.12.1, 1.120.6 MB
f1497ed771df…Get - OneBlockUltima-forge-1.7.10-3.0.019 Aug 20261.7.100.6 MB
41e70fa45b4c…Get - OneBlockUltima-forge-1.12.x-3.0.09 Aug 20261.12.2, 1.12.1, 1.120.6 MB
a61092fd2788…Get - OneBlockUltima-forge-1.12.x-2.1.325 Jul 20261.12.2, 1.12.1, 1.120.6 MB26 downloads
4904987a840f…Get - OneBlockUltima-forge-1.7.10-2.1.225 Jul 20261.7.100.5 MB
6e76c1385826…Get - OneBlockUltima-forge-1.7.10-2.1.122 Jul 20261.7.100.5 MB20 downloads
1a210670115a…Get - OneBlockUltima-forge-1.12.x-2.1.222 Jul 20261.12.2, 1.12.1, 1.120.6 MB12 downloads
f3da02109719…Get - OneBlockUltima-forge-1.12.x-2.1.118 Jul 20261.12.2, 1.12.1, 1.120.6 MB26 downloads
163d035f55c1…Get
Frequently asked
Does OneBlockUltima work on Minecraft 1.12.2?
Yes. 1.12.2 is the newest Minecraft version OneBlockUltima 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 OneBlockUltima support?
Everything the author has declared, from 1.7.10 up to 1.12.2. The full list is in the table above, with the Java runtime each version needs next to it.
Which platform or loader does OneBlockUltima support?
Forge. 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 OneBlockUltima?
Among the supported Minecraft releases above, the highest recorded requirement is Java 8 or newer. Use the requirement for the exact Minecraft version you run; previews and snapshots may differ.
How do I install OneBlockUltima?
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 OneBlockUltima safely?
Start with the author's page on CurseForge, 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.
Is this information wrong or missing something? .