Multi-overworld
Multi-overworld adds a second overworld that is a mirror of the first one. The second overworld can be accessed by crafting a World2 Portal block!
About this Mod
Multi-overworld adds a second overworld that is a mirror of the first one. The second overworld can be accessed by crafting a World2 Portal block!
Fully supports
Oh the biomes you go
Biomes o' plenty
Available Versions
How to Install Multi-overworld on Your Server
Order Server
Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).
Set forge Loader
In the panel under "Egg", select the forge loader and matching Minecraft version (1.21.5).
Install Mod
Open the mod browser in the dashboard and search for "Multi-overworld". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.
Compatibility
Mod Loaders
Minecraft Versions
1.21.5, 1.21.4, 1.21.3 (+9 more)
Server-side
✓ RequiredRecommended RAM
4 GB(min. 3 GB)Frequently Asked Questions
Multi-overworld server crashes on startup – what to do?
Most common cause: wrong forge 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 (1.21.5). You can switch loaders with one click in the panel.
Is Multi-overworld compatible with forge?
Multi-overworld officially supports forge for Minecraft 1.21.5, 1.21.4, 1.21.3. The Mado dashboard automatically detects incompatible loader combinations.
Server lagging with Multi-overworld – how to optimize performance?
Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Multi-overworld 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 Multi-overworld with just one click on your server.