Valkyrien Skies [UNOFFICIAL]  Port

Valkyrien Skies [UNOFFICIAL] Port

An unofficial NeoForge/Fabric port of the Valkyrien Skies 2 physics engine to the newer Minecraft versions!

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19.0K Downloads
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Screenshots

1.21.11 IRIS COMPAT!
fabric 1.21.11
1.21.1 neoforge
Physycs ship

About this Mod

Valkyrien Skies (Unofficial Port)

⚠️ IMPORTANT DISCLAIMER

This is an UNOFFICIAL port of Valkyrien Skies for newer Minecraft versions and mod loaders.

  • Do NOT report any bugs or issues found in this version to the official Valkyrien Skies developers.
  • For support, bug reports, or questions regarding this port, please leave a comment here or contact the port author directly.

🌟 About the Port

This build brings the powerful physics engine of Valkyrien Skies 2 to newer versions of Minecraft.

It allows you to create airships, boats, and other physics-based moving structures using the Valkyrien Skies physics system.

The project includes ports for modern mod loaders, with compatibility depending on the specific Minecraft version and loader.

🔧 Port Origin & Compatibility

  • Development: This version was built using existing port branches and source code from GitHub and has been further tweaked, fixed, and improved to work properly on newer Minecraft versions.
  • Iris Shaders: Compatible with the Fabric build for Minecraft 1.21.11.
  • Oculus: Compatibility may vary depending on the Minecraft version and loader.
  • ETF & EMF: Currently incompatible for unknown reasons. This may be fixed in future updates.

⚠️ Important: Compatibility can differ between Minecraft versions and mod loaders. Always use dependency versions matching your specific setup.

🛠️ Required Dependencies

To play this mod, you MUST install the required dependencies for your specific Minecraft version and mod loader.

  1. Kotlin - Required by the port
  2. Architectury API — Required by the port.

Make sure to use dependency versions compatible with your Minecraft version and mod loader.


👤 Original Developers

Huge thanks to the original developers of Valkyrien Skies:

  • triode_ — Original Valkyrien Skies developer.
  • rubydesic — Original Valkyrien Skies and Eureka! Ships developer.

If the developer has any questions or complaints, please contact me on Discord: @valeriy1199

📜 Credits & License

  • Original Creators: Huge thanks to triode_, rubydesic, and the entire Valkyrien Skies team for creating this amazing physics engine.
  • Original Source Code: Valkyrien Skies GitHub
  • License: This port is distributed under the LGPL-3.0 License, strictly adhering to the original mod's licensing terms.

Available Versions

Valkyrien Skies [UNOFFICIAL]release
MC 1.21.11fabric
August 24, 2026

How to Install Valkyrien Skies [UNOFFICIAL] Port on Your Server

1

Order Server

Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).

2

Set fabric Loader

In the panel under "Egg", select the fabric loader and matching Minecraft version (26.2).

3

Install Mod

Open the mod browser in the dashboard and search for "Valkyrien Skies [UNOFFICIAL] Port". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.

Compatibility

Mod Loaders

fabricneoforge

Minecraft Versions

26.2, 1.21.11, 1.21.1

Server-side

✓ Required

Recommended RAM

4 GB(min. 3 GB)

Frequently Asked Questions

Valkyrien Skies [UNOFFICIAL] Port server crashes on startup – what to do?

Most common cause: wrong fabric version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (26.2). You can switch loaders with one click in the panel.

Is Valkyrien Skies [UNOFFICIAL] Port compatible with fabric and neoforge?

Valkyrien Skies [UNOFFICIAL] Port officially supports fabric, neoforge for Minecraft 26.2, 1.21.11, 1.21.1. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with Valkyrien Skies [UNOFFICIAL] Port – how to optimize performance?

Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Valkyrien Skies [UNOFFICIAL] Port 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 Valkyrien Skies [UNOFFICIAL] Port with just one click on your server.

Recommended RAM
4 GBfrom €5.2/mo
Minimum 3 GB | per 8 players
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Details

License
GNU Lesser General Public License v3.0 only
Server-side
Required

Supported Versions

26.21.21.111.21.1