Slimefun United transforms your server into a modpack-like experience with backpacks, jetpacks, reactors, electricity...
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.
🧪 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.
🚀 Release channels
Stable releases
For production servers.
✔️ Safe ✔️ Tested ✔️ Recommended
Development (alpha) builds
For testers and early adopters.
⚠️ Not recommended for production
📦 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.
🔌 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.
🧩 Addons & Ecosystem
Slimefun has a massive add-on ecosystem maintained by the community.
Browse addons here!
🖼 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 |
💬 Community
Join our Discord server for help, updates, and discussion!
📚 Wiki
Slimefun United has a (detailed and frequently maintained - ahem) Wiki for new players, and you can also consider contributing to the Wiki.
⭐ 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!
🤝 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 ❤️
⚠️ 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.
💚 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
Pages
Members