One Block OriginalModpacks · 1.21A challenging and addictive One Block modpack where every block counts, letting you start from a single block and gradually expand your world with creativity…
Free34,842 downloads
A Minecraft modpack centered around the One Block challenge, where players begin on a single block that regenerates infinitely. Progress through unique…
Direct download from Modrinth · 58,133 downloads
One Block Challenge is a modpack made by Lactobacillus. A Minecraft modpack centered around the One Block challenge, where players begin on a single block that regenerates infinitely. Progress through unique…
It supports Minecraft 1.21. It has been downloaded 58,133 times on Modrinth. The last update came out on Aug 2, 2026.
One Block Challenge has had 2 releases on Modrinth since Dec 6, 2025. 2 of them came out in the past year. The newest is 1.1.0, released on Aug 2, 2026. It is made for Minecraft 1.21.10. It runs on Fabric. The download is 6.0 MB.
| Version | Released | Minecraft | Type |
|---|---|---|---|
1.1.0 | Aug 2, 2026 | 1.21.10 | Release |
1.0.0 | Dec 6, 2025 | 1.21.10 | Release |
One Block is a fun survival modpack where you start on a single block floating in the void. Breaking the block gives you different items, blocks, and mobs as you progress through phases. Build your island, gather resources, and survive using just one block.
Written by Lactobacillus. Read it with pictures on Modrinth.
This modpack runs on Fabric for Minecraft 1.21. The launcher you install it with sets that up for you.
Download the .mrpack file from Modrinth.
Open it with a launcher that reads .mrpack files, such as the Modrinth App or Prism Launcher: it makes a new instance with every mod and setting of the pack.
Give the instance enough memory: most modpacks want 4 to 8 GB.
To play it with friends on a server, use the server files of the modpack if its page offers them; otherwise install the same mods on the server.
Full guide: How to install Minecraft mods
| Resource | Downloads | Versions | Last update | Price |
|---|---|---|---|---|
| One Block Challengethe one you looked at | 58K | 1.21 | Aug 2, 2026 | Free |
| One Block OriginalLactobacillus | 35K | 1.21 | Jan 11, 2026 | Free |
 One Block ModPackLactobacillus | 133K | 1.21 | Nov 30, 2025 | Free |
 One Block Lucky BlockLactobacillus | 83K | 1.20 | Feb 13, 2026 | Free |
Not yet. The newest version it supports is Minecraft 1.21.
Yes. One Block Challenge is free to download from Modrinth.
Yes. The last update came out in the past day.
The closest ones are One Block Original, One Block ModPack and One Block Lucky Block. Compare all alternatives
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