One Block Data pack for Minecraft 1.21.1, 1.19.2

One Block

**You start on a single grass block floating in an empty void. Everything you will ever own falls out of it.**

A random item drops every few seconds. That is your entire supply chain. Wood, stone, food, ore, tools — whatever the block decides to give you, and nothing else.

Built for servers

This is the part most One Block packs get wrong: they give everybody the same island.

Here, every player who joins gets their own island, automatically, 10 000 blocks away from everyone else. No setup, no commands, no admin work. Someone joins, they get a fresh block in the void and their own item stream.

Fall into the void and you are put back on your island — not on someone else's.

Prefer one shared island? One command, see below. It is a setting, not a different download.

What you get

Your own island - Assigned automatically the moment you join A random item every 3 seconds - Drawn from 1 551 items Nothing silly in the pool - No spawn eggs, no command blocks, no barriers, no bedrock Void rescue - Fall off and you are returned to your own island Adjustable - Drop speed and island spacing, one command each

Settings

/scoreboard players set #interval ob 60 drop interval in ticks (60 = 3 seconds) /scoreboard players set #spacing ob 10000 distance between islands, in blocks /scoreboard players set #spacing ob 0 ONE shared island for everyone

With #spacing 0 everybody lands on the same block and one item drops per interval instead of one per player — so a full server does not bury the island.

Installation

This needs a brand new world. The void world is created when the world is first generated, so it cannot be added to an existing map.

Server

• Stop the server
• Delete the world folder, or set a new level-name in server.properties
• Put the .zip into /datapacks/
• Start the server — every player gets an island on join

Singleplayer

• Create a new world
• Drag the .zip onto the world-creation screen before pressing Create

Datapack or mod file?

The data pack (.zip) works everywhere — vanilla, Paper, Spigot, Fabric, NeoForge — and is the right choice for most servers.

For Minecraft 26.3 there are also two mod files, if you would rather manage this like any other mod:

Loader - File - Needs

Fabric - one-block-fabric-26.3.jar - Fabric API NeoForge - one-block-neoforge-26.3.jar - nothing else

It is the same pack, without extra code. Put the file into mods/. Two differences from the data pack:

• A mod file is always on. A data pack can be left out of a world; a mod file

cannot. Use it only for worlds that should be One Block worlds.

• It still needs a brand new world — the void is generated together with the

world.

Both files were run on a real 26.3 server of their own loader (Fabric and NeoForge): void world, island, void rescue, 12 of 12 item drops and the separate-islands setting. As a control, the same server without the file fails every one of those checks.

Compatibility

• Minecraft 1.18 through 26.3 — this project covers a lot of ground.

Pick the download that matches your version: 26.3+ for Minecraft 26.3 and 26.4 snapshots, 26.1+ for 26.1 and 26.2, and the numbered downloads below that for everything from 1.18 to 1.21.11.

• Vanilla, Fabric, Paper, Spigot, Purpur, Folia, NeoForge — it is a datapack
• Server-side only. Players install nothing.

One thing to expect in singleplayer: Minecraft shows a one-time warning — "Worlds using Experimental Settings are not supported". Click "I Know What I'm Doing!". That is normal for any pack that changes world generation. Servers never show this.

What is new

One download instead of two. The pack used to ship two files — one where every player gets their own island, one with a single shared island. They are now the same file: #spacing 0 gives you the shared island, and it drops one item per interval instead of one per player.

Honest version bounds. Each download states the highest Minecraft format it was actually tested on, instead of claiming to run on everything that will ever come.

Minecraft 26.3 support, and 26.4 snapshots. 26.3 changed two data formats and the older files could not load at all — the server refused to start. That is fixed.

In-game messages are English, and the drop pool covers everything the game gained up to 26.3.

Tested on real 26.1, 26.2 and 26.3 servers: the void world generates, islands are built, the void rescue triggers below y=-5, twelve out of twelve draws from the drop table produce an item, two players land 10 000 blocks apart — and on the same block with #spacing 0.

Can I add it to a world I already play? No. The void world only exists if the pack is present when the world is created.

Do players need to install anything? No. Server-side only.

Two players, one island? Only if you want it: /scoreboard players set #spacing ob 0. Otherwise everyone gets their own, automatically.

Can I change how fast items drop? Yes, with the #interval command above. 20 ticks is one second.