About Bossominium
From ModrinthA mod that adds multiple new bosses that bring a challenge
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!
Highlights
From source dataGame versions
Supports 2 Minecraft versions, the newest being 1.20.1.
Loaders
Runs on Forge.
Footprint
Rated a light load on a server.
Bossominium on Nxeon
From our catalogue- One-click install
- Supported on Nxeon Minecraft servers. We download it from Modrinth, place it, and restart the server.
- Server side
- Required on the server
- Server type needed
- Forge
- Server load
- light
- Smallest plan we suggest
- Minecraft — 2 GB (2 GB RAM). This follows our own load rating above, not a benchmark.
- Latest build
- 18.6, released 2025-01-26
Game versions by loader
| Loader | Game versions | Newest |
|---|---|---|
| Forge | 1.19.4 to 1.20.1 (2 versions) | 1.20.1 |
From 5 recorded builds of Bossominium.
Recent builds
| Build | Released | Game versions | Loaders |
|---|---|---|---|
| 18.6 | 2025-01-26 | 1.20.1 | Forge |
| 18.5 | 2024-04-24 | 1.20.1 | Forge |
| 18.5 | 2024-04-24 | 1.19.4 | Forge |
| 18.4 | 2024-04-17 | 1.20.1 | Forge |
| 18.4 | 2024-04-17 | 1.19.4 | Forge |
Run Bossominium on a Minecraft server
Pick a server or deploy a new one above; it is installed in one click.
What kind of mod it is
From the catalogCreatures & NPCs
Adds or changes creatures, NPCs and how they behave.
Runs on your server
From source side supportModrinth lists Bossominium as required on the server. Check its Modrinth page to see whether players need it too.
Compatibility
- Game
- Minecraft
- Loaders
- Forge
- Runs on
- Serverrequired on the server
- Game versions
- 1.20.1 and 1 earlier
Verified at the source
- ✓ModrinthOfficial listing, checked 2026-10-01Open ↗
- ✓AuthorShaywsgu, as published on Modrinth
- ✓LicenseLicenseRef-All-Rights-ReservedFree
