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One Block ChallengeMinecraft modpack for 1.21.10

A Minecraft modpack centered around the One Block challenge, where players begin on a single block that regenerates infinitely. Progress through unique phases, gather resources, explore dimensions, and build your world from almost nothing.

client and servernewest supported release 1.21.10AdventureOptimizationChallengingCombat
Latest version
1.1.0
Minecraft
1.21.10
Loader
Fabric
Licence
CC0-1.0
Downloads
47.4k
Updated
3 mo ago
Available on
Modrinth
Space NodeOur hosting

Host One Block Challenge servers

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

  • 1.21.10
  • Fabric
  • One click modpack install
  • Dependencies handled
  • Tuned startup flags
  • 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 One Block Challenge declares support for, newest first, with the Java runtime that version needs.

Other modpacks
MinecraftThroughJavaEvidenceReleased
1.21.10Fabric21+declared7 Oct 2025

Download

From One Block Challenge’s own host. Nothing is re-hosted here.

Most recently published release

1.1.0release2 Aug 2026

one block challenge 1.1.0.mrpack · 6.0 MB · for 1.21.10 · Fabric

Download this release
8bbc5726cc72…
Older versions1
  • 1.0.06 Dec 20251.21.1015 KB41.8k downloadseef8794dd576…Get

Frequently asked

Does One Block Challenge work on Minecraft 1.21.10?

Yes. 1.21.10 is the newest Minecraft version One Block Challenge declares support for, and the claim comes from the author's own release metadata rather than from a compatibility list somebody maintains by hand.

Do I need to install One Block Challenge 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 One Block Challenge support?

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 One Block Challenge?

Among the supported Minecraft releases above, the highest recorded requirement is Java 21 or newer. Use the requirement for the exact Minecraft version you run; previews and snapshots may differ.

What licence is One Block Challenge under?

CC0-1.0, 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 One Block Challenge?

Use a launcher that imports packs, such as Prism Launcher, the Modrinth App or the CurseForge app, and open the pack file with it. The launcher installs the right loader and mods for you; installing a pack's mods by hand is the error-prone way.

Where do I download One Block Challenge 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.

Details from Modrinth, where the author last updated it on 2 Aug 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? .