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Multiplayer BossesMinecraft mod for 1.21.1

A server-side mod that makes boss health and loot drops scales to player count.

client and servernewest supported 1.21.1UtilityAdventureMobsGame Mechanics
Latest version
1.0.0
Minecraft
1.20.1 to 1.21.1
Java
Java 21+
Loaders
Forge, NeoForge
Licence
GPL-3.0-only
Downloads
80.3k
Updated
6 mo ago
Available on
Modrinth
Space NodeOur hosting

Host Multiplayer Bosses servers

One click and Multiplayer Bosses is installed with the right loader, on hardware built for it.

  • 1.21.1
  • Forge
  • NeoForge
  • One click mod install
  • Loader matched for you
  • Ryzen CPUs
  • NVMe SSD
Deploy a serverFrom €0.90 per GB

Minecraft versions

Every version Multiplayer Bosses declares support for, newest first, with the Java runtime that version needs.

Other mods
MinecraftThroughJavaEvidenceReleased
1.21.1Forge, NeoForge21+declared8 Aug 2024
1.20.1Forge, NeoForge17+declared12 Jun 2023

Download

From Multiplayer Bosses’s own host. Nothing is re-hosted here.

1.0.0release15 Mar 2026

multiplayerbosses-neoforge-1.21.1-1.0.0.jar · 0.4 MB · for 1.21.1

Download latest
da3158fbd13d…
Older versions4
  • 1.1.329 Nov 20241.20.10.0 MB74.0k downloads34c1cef91d31…Get
  • 1.1.230 Oct 20241.20.10.0 MB327 downloads37bd964b074a…Get
  • 1.1.128 Oct 20241.20.10.0 MB106 downloads6a731c7cc0f4…Get
  • 1.1.026 Oct 20241.20.10.0 MB87 downloadsb0bdcca71f6f…Get

Frequently asked

Does Multiplayer Bosses work on Minecraft 1.21.1?

Yes. 1.21.1 is the newest Minecraft version Multiplayer Bosses declares support for, and the claim comes from the author's own release metadata rather than from a compatibility list somebody maintains by hand.

Which Minecraft versions does Multiplayer Bosses support?

Everything the author has declared, from 1.20.1 up to 1.21.1. The full list is in the table above, with the Java runtime each version needs next to it.

Do I need to install Multiplayer Bosses on the client or the server?

Both. Every player needs it installed and so does the server, so anyone joining without it will be refused.

Which platform or loader does Multiplayer Bosses support?

Forge, NeoForge. A build for one platform or loader will not necessarily load on another, so this is the first thing to check before the Minecraft version.

Which Java version do I need for Multiplayer Bosses?

On the newest Minecraft version it supports, Java 21 or newer. The requirement comes from the Minecraft version you run rather than from the mod itself, so on an older supported Minecraft the answer is that version's Java, not this one.

What licence is Multiplayer Bosses under?

GPL-3.0-only, as stated by the author on the platform we synced it from. Check the project's own page before redistributing or bundling it.

How do I install Multiplayer Bosses?

Install the matching loader first, then put the downloaded file in your mods folder and start the game. The loader, the mod and Minecraft all have to be on the same version, which is the usual reason a mod does not appear in game.

Where do I download Multiplayer Bosses safely?

Start with the author's page on Modrinth, which is where the data here is synced from. MCReference does not host or repackage files. The download link goes to the source recorded for that release; verify the publisher, filename and checksum before running it.

Works on the same versions

Ordered by how much of the recent Minecraft version coverage overlaps, not by popularity.

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Last checked 2 mo ago against Modrinth. We do not host files and we do not republish descriptions; every download link points at the author’s own release.

Is this information wrong or missing something? .