UnderWorld SMP Modpack
A heavily modded Minecraft experience focused on underground exploration, survival, and community. Dig deep, build creatively, and thrive in a world where the real adventure starts below the surface.
Screenshots
About this Modpack
🔹 UnderWorld SMP Modpack – Survive, build, and thrive beneath the surface.
Dive into a modded Minecraft experience where the world begins underground and civilization rises from the caves.
This pack is designed for the UnderWorld SMP server and emphasizes:
🌍 Deep World Generation – Explore massive cave systems, underground rivers, and forgotten bunkers
⚔️ Enhanced Combat – Thanks to Better Combat and smooth animations
🎙️ Built-in Proximity Voice Chat with group support
🏗️ Create Mod Tech, vertical base-building, and immersive decor
📜 Lore & Story Support – Mods like Amendments, Athena, and Server Replay for storytelling
🔧 QoL Mods – JEI, mod menus, dynamic lighting, and performance boosts
🌐 Multiplayer-Optimized – Built for smooth performance on SMP with AntiXray, Replay, VoiceChat, and more
Whether you’re into story-driven roleplay, technical builds, or epic underground exploration, this pack is made to fuel your creativity below the surface.
Available Versions
How to Set Up a UnderWorld SMP Modpack Server
Order Server
Choose at least 6 GB RAM (8 GB recommended for UnderWorld SMP Modpack). Based on player count: per 5 players.
Install Modpack in Dashboard
Open the modpack browser in the dashboard, search for "UnderWorld SMP Modpack" and click "Install". The fabric loader and Minecraft 1.21.1 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
UnderWorld SMP Modpack 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 8 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 UnderWorld SMP Modpack server really need?
Minimum 6 GB, recommended 8 GB for stable performance. per 5 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 €12/month).
Can I add custom mods to UnderWorld SMP Modpack without conflicts?
Yes, but check compatibility: only use mods for the same loader (fabric) and same Minecraft version (1.21.1). 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.
UnderWorld SMP Modpack server lagging – performance tips
1) Increase RAM to 8 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.
Rent UnderWorld SMP Modpack Server
Start your own server with automatic modpack installation.
Supported Versions
Start your UnderWorld SMP Modpack Server now
From €12.00/month with 8 GB RAM for the best performance.
Configure Server →