Bossominium
A mod that adds multiple new bosses that bring a challenge
About this Mod
NOTE: This mod will no longer be updated due to the original files being corrupeted, thank you all for the great support this mod has gotten, this mod has had a great run
Introduction
The Bossominium mod is a mod that adds multiple bosses into the game. All these bosses have unique item drops that you could use for various items. The items you want to craft depend on your playstyle, if you want to craft an offensive item you can, if you want to craft a defensive item you can. The choices are up to you
Currently there are 23 bosses, and 46 achievements. To suggest features for this mod, use this forum
This mod REQUIRES Geckolib to work
Starting
At the start of any world, you'll be granted with a new item, The Bossdexium. This item is a guide on how to summon all the bosses below. This item also has a crafting recipe if you lost the original.
Almost 300,000 Downloads on CurseForge!
Available Versions
How to Install Bossominium 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 (1.20.1).
Install Mod
Open the mod browser in the dashboard and search for "Bossominium". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.
Compatibility
Mod Loaders
Minecraft Versions
1.20.1, 1.19.4
Server-side
✓ RequiredRecommended RAM
4 GB(min. 3 GB)Frequently Asked Questions
Bossominium 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 (1.20.1). You can switch loaders with one click in the panel.
Is Bossominium compatible with forge?
Bossominium officially supports forge for Minecraft 1.20.1, 1.19.4. The Mado dashboard automatically detects incompatible loader combinations.
Server lagging with Bossominium – how to optimize performance?
Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Bossominium 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.
Similar Mods
Rent Modded Server
Install Bossominium with just one click on your server.