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Hostile HarmonyMinecraft mod for 1.21.1

Ever noticed how pillagers and zombies just... ignore each other? Or how a skeleton will walk right past a vindicator like they're old friends? Yeah, that's always bugged me too. This mod makes hostile mobs actually hostile to each other. Illagers vs the

client and servernewest supported 1.21.1AdventureMobsGame Mechanics
Latest version
1.0.4
Minecraft
1.20.1 to 1.21.1
Java
Java 21+
Loaders
Fabric, NeoForge, Forge
Licence
LicenseRef-All-Rights-Reserved
Downloads
3.3k
Updated
23 d ago
Available on
Modrinth
Space NodeOur hosting

Host Hostile Harmony servers

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

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

Minecraft versions

Every version Hostile Harmony declares support for, newest first, with the Java runtime that version needs.

Other mods
MinecraftThroughJavaEvidenceReleased
1.21.1Fabric, NeoForge, Forge21+declared8 Aug 2024
1.20.6NeoForge, Forge, Fabric21+declared29 Apr 2024
1.20.5Forge, Fabric, NeoForge21+declared23 Apr 2024
1.20.4Forge, Fabric, NeoForge17+declared7 Dec 2023
1.20.3NeoForge, Forge, Fabric17+declared4 Dec 2023
1.20.2Fabric, NeoForge, Forge17+declared20 Sept 2023
1.20.1Forge, NeoForge, Fabric17+declared12 Jun 2023

Download

From Hostile Harmony’s own host. Nothing is re-hosted here.

1.0.4release24 Jul 2026

hostileharmony-1.0.4.jar · 0.4 MB · for 1.20.6, 1.20.5, 1.20.4, 1.20.3, 1.20.2 +1 more

Download latest
46f7c5d3ad97…
Older versions4
  • 1.0.37 Jun 20261.20.6, 1.20.5, 1.20.4, 1.20.3, 1.20.2 +1 more0.5 MB517 downloads338bb2786439…Get
  • 1.0.27 Jun 20261.20.6, 1.20.5, 1.20.4, 1.20.3, 1.20.2 +1 more0.4 MB11 downloads1f5e24bfe3fc…Get
  • 1.0.110 Mar 20261.20.6, 1.20.5, 1.20.4, 1.20.3, 1.20.2 +1 more0.4 MB814 downloadsa9b515ee1a14…Get
  • 1.0.028 Feb 20261.20.6, 1.20.5, 1.20.4, 1.20.3, 1.20.2 +1 more0.4 MB55 downloads9d027e85c360…Get

Frequently asked

Does Hostile Harmony work on Minecraft 1.21.1?

Yes. 1.21.1 is the newest Minecraft version Hostile Harmony 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 Hostile Harmony 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 Hostile Harmony 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 Hostile Harmony support?

Fabric, NeoForge, Forge. 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 Hostile Harmony?

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 Hostile Harmony under?

LicenseRef-All-Rights-Reserved, 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 Hostile Harmony?

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 Hostile Harmony 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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Details from Modrinth, where the author last updated it on 17 Sept 2026. 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? .