
Modrinth · Minecraft mod
Oneblock
A "Oneblock" is a variant of the popular game Minecraft. In this mode, players start on a single floating block in the void.
Quick answer
Which Oneblock release should I use?
Oneblock 0.3+mod targets 1.21, 1.21.1, 1.21.10 with Fabric, Forge, NeoForge. Installation on the client is optional. Installation on the dedicated server is optional. No extra mods listed for this file.
Where it goes
Is Oneblock required on the client, server, or both?
Installation on the client is optional. Installation on the dedicated server is optional.
The source marks this as usable on both the client and server.
What else does Oneblock 0.3+mod need?
0.3+mod. Change the file and its required mods may change too.
This file does not list any required mods. Do not add a library just because a different file uses it.
This file does not list any required or optional mods.
Before you install it
Add Oneblock without breaking your instance.
Built for Oneblock 0.3+mod. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use 0.3+mod. It targets 1.21, 1.21.1, 1.21.10 with Fabric, Forge, NeoForge; another release may have different loader, side or dependency requirements.
- 02
Bring the mods it needs
This file does not list any required mods. Do not add a library just because a different file uses it.
- 03
Put it on the correct side
Installation on the client is optional. Installation on the dedicated server is optional.
- 04
Pick the file you checked
Use the “Get this file” button beside 0.3+mod. It opens that exact file at the source.
About this project
What does Oneblock add?

Oneblock is a server-side Data Pack / Mod that add a variant of the popular game Minecraft, designed as a challenge for players.
In this mode, players start on a single floating block in the void.
📌 Goals
The goal is to survive and thrive starting from this one block:
🛠️ Building: Expand your island by creating structures, farms, and automation systems.
🍃 Survival: Manage limited resources, avoid falling into the void, and deal with any mobs that might spawn.
👷♀️ Progression: Advance through the various phases of the game by gathering increasingly advanced resources.

Starting Block: The player begins on a single block of dirt or another material. This block is the only thing preventing the player from falling into the void.
Block Regeneration: When the player breaks the initial block, another block appears in its place. These blocks can be of different types (dirt, wood, stone, ores, etc.) and sometimes generate useful resources or items.
Website
If you have any questions, need assistance, or simply want to share your thoughts or feedback, feel free to reach out. We're always here to help and would love to hear from you – whether you're looking for answers, suggestions, or just want to let us know how we're doing.

Other links
Project description from Modrinth.
Pick your setup
Oneblock by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
1.21.9
5 loader builds1.21.8
5 loader builds1.21.7
5 loader builds1.21.6
5 loader builds1.21.5
5 loader builds1.21.4
5 loader builds1.21.3
5 loader builds1.21.2
5 loader builds1.21.1
5 loader builds1.21
5 loader buildsCheck the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
Oneblock versions and loaders
0.3+mod
oneblock-data-pack-0.3.jar
12 Oct 2025
0.3
Oneblock v3.zip
12 Oct 2025
0.2+mod
oneblock-data-pack-0.2.jar
10 Aug 2025
0.2
Oneblock 0.2v.zip
10 Aug 2025
0.1+mod
oneblock-data-pack-0.1.jar
24 Jul 2024
0.1
Oneblock 0.1v.zip
17 Jul 2024
Looking for an older file? The official Modrinth project page is in Resources.