
The Unstable SMP Simulator
MOST UPDATED Unstable Simulator This is a Minecraft modpack page for the Unstable SMP Battle Simulator, bundling CarpetPVPMaps’ battle maps with pre-installed PvP and performance mods so players can install and play instantly without manual setup.
About this Modpack
⚠️ THIS SIMULATOR DOES NOT BELONG TO ME

Image from Wemmbu
📦 About
I made this modpack for players to install Unstable Simulator more easily — without the tedious process of installing maps, selecting mods, and configuring everything manually.
All the necessary mods for PvP and optimization are pre-installed.
🗺️ Maps
Many of these maps features like mace bot will not work at 1.21.11
All Credits to CarpetPVPMaps
| Map | Link |
|---|---|
| Unstable SMP Final Law Battle Simulator | Download |
| 2v1000 Law Battle Simulator Unstable SMP | Download |
| Unstable SMP Great Sea Law Battle Simulator | Download |
| Unstable SMP Tournament Simulator (FREE) | Download |
❌ Not included due to max file size:
Unstable SMP Experience
🛒 You can buy more maps from CarpetPVPMaps Patreon
🧩 Mods
| Mod | Category |
|---|---|
| Fabric API | Core |
| Carpet | Core |
| Modify Player Data | Core |
| Carpet crit fix | PvP Fix |
| Carpet mace fix | PvP Fix |
| Wither Death Sounds | QoL |
| ukulib | Library |
| uku's Armor HUD | QoL |
| BetterHurtCam | QoL |
| Sodium | Performance |
| Lithium | Performance |
| Alternate Current | Performance |
| AppleSkin | QoL |
| and more.. | — |
👥 Multiplayer
You can use Essential to play with others!
⚠️ Your friends need to have the same modpack installed too.
💻 Custom Commands
| Command | Description |
|---|---|
/trigger lobby |
Teleports you back to the lobby |
/trigger stab |
Gives you orbital stab shot |
/trigger nuke |
Gives you orbital nuke shot |
🎬 Showcase
Thanks to CarpetPVPMaps for creating this awesome map!!
✨ What does this modpack add?
This modpack is an all-in-one package for the Unstable SMP Battle Simulator experience. Instead of manually downloading maps, searching for mods, and configuring everything yourself, everything comes ready to play out of the box.
Features
| Feature | Description |
|---|---|
| 🗺️ Pre-installed Maps | Multiple battle simulator maps by CarpetPVPMaps — Final Law Battle, 2v1000, Great Sea, and Tournament Simulator |
| ⚔️ PvP Fixes | Critical hit and mace mechanics fixed for accurate combat |
| ⚡ Performance Optimization | Sodium, Lithium, and Alternate Current for the best FPS and TPS |
| 🎮 Quality of Life | Armor HUD, AppleSkin, BetterHurtCam, and Wither Death Sounds |
| 💬 Custom Commands | Lobby teleport, orbital stab, and orbital nuke via simple /trigger commands |
| 👥 Multiplayer Ready | Use Essential to invite friends and play together instantly |
Why download this?
✅ No setup hassle — Skip the tedious process of installing maps and mods one by one
✅ Everything included — Maps, mods, and configurations are all pre-packaged
✅ Optimized out of the box — Performance mods already configured
✅ Just install and play — Launch the modpack and jump straight into battle
⚠️ You need minimum 18 render distance and simulation distance for maps to work
Available Versions
How to Set Up a The Unstable SMP Simulator Server
Order Server
Choose at least 4 GB RAM (6 GB recommended for The Unstable SMP Simulator). Based on player count: per 8 players.
Install Modpack in Dashboard
Open the modpack browser in the dashboard, search for "The Unstable SMP Simulator" and click "Install". The fabric loader and Minecraft 1.21.11 are configured automatically.
Start Server & Play
Start the server – all mods are loaded automatically. Share the server IP with friends and play together!
Frequently Asked Questions
The Unstable SMP Simulator server crashes or won't start – what to do?
Most common causes: insufficient RAM or wrong fabric loader. Check latest.log for "OutOfMemoryError" → increase RAM to at least 6 GB. For "Mixin" or "ClassNotFoundException" errors: modpack version and loader don't match. With Mado Hosting, loader and Minecraft version are auto-configured on modpack install – preventing most startup issues.
How much RAM does a The Unstable SMP Simulator server really need?
Minimum 4 GB, recommended 6 GB for stable performance. per 8 players. Important: Minecraft modpacks need more RAM than vanilla – plan extra per additional player. With Mado Hosting, you can scale RAM up live at any time without data loss (from €8/month).
Can I add custom mods to The Unstable SMP Simulator without conflicts?
Yes, but check compatibility: only use mods for the same loader (fabric) and same Minecraft version (1.21.11). Common issues: ID conflicts with recipe mods and incompatible coremod versions. The Mado dashboard mod browser only shows compatible mods and warns about known conflicts.
The Unstable SMP Simulator server lagging – performance tips
1) Increase RAM to 6 GB+. 2) Reduce server view-distance to 8 (server.properties). 3) Pre-generate chunks with the "Chunky" plugin. 4) Use /spark profiler to check which mods consume the most tick time. With Mado Hosting, all servers run on NVMe SSDs with dedicated CPU cores – eliminating hardware as a bottleneck.
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Supported Versions
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