One Survival Island

One Survival Island

Datapack that creates a Single Survival Island in an Infinite Ocean World

by
100.9K Downloads
datapackfabricforgeneoforgequiltadventureutilityworldgen
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Screenshots

Choose your island!
One Survival Island Screenshot 2

About this Mod

One Island

You spawn on a small survival island, in the middle of an endless ocean world. There are no other islands. Additionally, the oceans generate deeper (this is primarily to stop an issue in vanilla where land generates in ocean biomes).

Island Size Changing/Removing (Datapack ONLY)

Inside the data/one_island/worldgen/density_function/spawn.json file, there are two numbers you can change to adjust the size of the islands. I've left comments in this file for clarification on instructions, but you can modify your island to be thousands of blocks long, or even remove it entirely!

Compatibility

There is a high chance this will be compatible with most packs, although the worldgen may be overridden to this island generation.

Gameplay Notes

  1. The ocean is deeper than normal.
  2. There are no Mushroom Islands.
  3. There will likely be no dripstone caves/deep dark, as those only generate inland.
  4. Sometimes your island may be overtaken by a river, you can always make a new world to test out a better seed.

I may update this in the future to have these cave biomes though if this becomes popular/requested.

Future Plans

  • Allow the mod version to be configured in-game, rather than needing to configure the data pack.

Available Versions

[MOD 1.20-26.1] One Survival Island 2.0.1release
MC 1.20, 1.20.1, 1.20.2, 1.20.3, 1.20.4, 1.20.5, 1.20.6, 1.21, 1.21.1, 1.21.2, 1.21.3, 1.21.4, 1.21.5, 1.21.6, 1.21.7, 1.21.8, 1.21.9, 1.21.10, 1.21.11, 26.1fabric, forge, neoforge, quilt
March 25, 2026
[DP 1.20-1.21.11] One Survival Island 2.0.1release
MC 1.20, 1.20.1, 1.20.2, 1.20.3, 1.20.4, 1.20.5, 1.20.6, 1.21, 1.21.1, 1.21.2, 1.21.3, 1.21.4, 1.21.5, 1.21.6, 1.21.7, 1.21.8, 1.21.9, 1.21.10, 1.21.11fabric, forge, neoforge, quilt
March 21, 2026
[MOD 1.20-1.21.10] One Survival Island 2.0.1release
MC 1.20, 1.20.1, 1.20.2, 1.20.3, 1.20.4, 1.20.5, 1.20.6, 1.21, 1.21.1, 1.21.2, 1.21.3, 1.21.4, 1.21.5, 1.21.6, 1.21.7, 1.21.8, 1.21.9, 1.21.10fabric, forge, neoforge, quilt
October 24, 2025
[DP 1.20-26.1] One Survival Island 2.0.1release
MC 1.20, 1.20.1, 1.20.2, 1.20.3, 1.20.4, 1.20.5, 1.20.6, 1.21, 1.21.1, 1.21.2, 1.21.3, 1.21.4, 1.21.5, 1.21.6, 1.21.7, 1.21.8, 1.21.9, 1.21.10, 1.21.11, 26.1datapack
October 24, 2025
[MOD 1.19-1.21.8] One Survival Island 2.0.0release
MC 1.19, 1.19.1, 1.19.2, 1.19.3, 1.19.4, 1.20, 1.20.1, 1.20.2, 1.20.3, 1.20.4, 1.20.5, 1.20.6, 1.21, 1.21.1, 1.21.2, 1.21.3, 1.21.4, 1.21.5, 1.21.6, 1.21.7, 1.21.8fabric, forge, neoforge, quilt
August 5, 2025

How to Install One Survival Island on Your Server

1

Order Server

Order a Minecraft Java server with at least 4 GB RAM (6 GB recommended).

2

Set datapack Loader

In the panel under "Egg", select the datapack loader and matching Minecraft version (26.1).

3

Install Mod

Open the mod browser in the dashboard and search for "One Survival Island". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.

Compatibility

Mod Loaders

datapackfabricforgeneoforgequilt

Minecraft Versions

26.1, 1.21.11, 1.21.10 (+22 more)

Server-side

Required

Recommended RAM

6 GB(min. 4 GB)

Frequently Asked Questions

One Survival Island server crashes on startup – what to do?

Most common cause: wrong datapack version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 4 GB RAM is allocated and the loader matches the mod version (26.1). You can switch loaders with one click in the panel.

Is One Survival Island compatible with datapack and fabric and forge and neoforge and quilt?

One Survival Island officially supports datapack, fabric, forge, neoforge, quilt for Minecraft 26.1, 1.21.11, 1.21.10. Note: Forge and Fabric mods are NOT cross-compatible – pick one loader and stick with it. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with One Survival Island – how to optimize performance?

Recommended RAM: 6 GB (per 5 players). Use /spark profiler to check if One Survival Island consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.

Rent Modded Server

Install One Survival Island with just one click on your server.

Recommended RAM
6 GBfrom €7.800000000000001/mo
Minimum 4 GB | per 5 players
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NVMe SSD Storage
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Details

License
MIT License
Server-side
Required

Supported Versions

26.11.21.111.21.101.21.91.21.81.21.71.21.61.21.51.21.41.21.3+15 more