Slimefun United

A modern, organised, community‑driven continuation of the Slimefun legacy — with full localisation support (WIP), active development, and compatibility with old saves.
✨ Magic, technology, automation, reactors, factories… all in one plugin.

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🧪 What is Slimefun United?

Slimefun United brings together the best features from the original Slimefun and its most popular forks, combining them into a single, actively maintained project.
It offers a modded‑like experience on an unmodded Minecraft server, adding:

• ⚡ Energy networks
• 🔥 Reactors and generators
• 🏭 Automation systems
• 🧪 Magic altars and runes
• 📦 Item transport systems
• 🛠️ Hundreds of machines, tools, and gadgets
• 🌍 Full translation support
• 🔌 A huge ecosystem of addons

Compatible with worlds previously using:

• The original Slimefun 4
• Gugu Project’s fork
• Other community forks (on request)

Slimefun has existed since 2013, with 500+ items and hundreds of contributors. Slimefun United continues that legacy with modern standards, frequent updates, and a welcoming community.

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🚀 Release channels

Stable releases

For production servers.
✔️ Safe ✔️ Tested ✔️ Recommended

Development (alpha) builds

For testers and early adopters.
⚠️ Not recommended for production

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📦 Supported Minecraft & Java Versions

Category	Supported
Minecraft	🎮 1.19.x – 1.21.11
Java	💻 Java 17+

You can check for older versions on Modrinth or Hangar.

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🔌 Server Compatibility

Server Software	Supported?
Spigot	❌ (use original Slimefun!)
Paper	✅
Purpur	✅
Folia	❌ (planned 👀)
CraftBukkit / Bukkit	❌
Sponge	❌
Hybrid servers (Mohist, ArcLight, etc.)	❌
Fabric / Forge / NeoForge	❌ (it's not a mod!)

Most forks of Paper should be compatible.

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🧩 Addons & Ecosystem

Slimefun has a massive add-on ecosystem maintained by the community.

Browse addons here!

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🖼 Screenshots

So, what does Slimefun United look like?
We asked some people from our Discord server to send us some screenshots:

Reactors and Energy	Amazing Automation Factory	Magic Laboratory
Screenshot by HamtaBot#0001	Screenshot by Piͭxͪeͤl (mnb)#5049	Screenshot by Kilaruna#4981
Screenshot by GalaxyKat11#3816	Screenshot by TamThan#7987	Screenshot by Kilaruna#4981

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💬 Community

Join our Discord server for help, updates, and discussion!

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📚 Wiki

Slimefun United has a (detailed and frequently maintained - ahem) Wiki for new players, and you can also consider contributing to the Wiki.

• Old official Wiki
• Gugu Project's Wiki (in Simplified Chinese)

⭐ Useful Documentation

• What is Slimefun?
• How to install Slimefun
• Slimefun 4 Addon List
• Slimefun 4 Addon Development Guide
• Getting Started
• FAQ
• Common Issues
• Help us expand the Wiki!
• Help us translate Slimefun!

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🤝 Contributing

Slimefun United is open‑source under GPLv3.

We welcome all:

• Pull requests
• Bug fixes
• Translations
• Addon development
• Feature proposals

Your contributions keep the project alive ❤️

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⚠️ Telemetry & Auto‑Updates

Slimefun United uses:

• GitHub API for update checks
• bStats for anonymous usage statistics
• Optional internal analytics (fully anonymous)

All telemetry can be disabled in the config.
No personal data is collected.

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💚 Credits

• Many thanks to TheBusyBiscuit and countless contributors and an amazing community, which made original Slimefun possible!
• Slimefun Gugu Project for many new features, bug fixes and updates
• neokini for Craft233MC's Folia-oriented fork
• SaanPrasanna for his translation of Gugu Project's Slimefun fork
• TheoDoR for his Slimefun Lab and some bug fixes and updates