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Opposing ForceMinecraft mod for 1.21.1

A mod that aims to introduce a wide variety of enemies to Minecraft!

client and servernewest supported release 1.21.1AdventureMobsEquipmentWorldgen
Latest version
3.0.0-beta8
Loaders
Forge, NeoForge
Licence
LicenseRef-Custom
Downloads
92.7k
Updated
17 d ago
Available on
Modrinth
Space NodeOur hosting

Host Opposing Force servers

One click and Opposing Force 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 Opposing Force 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 Opposing Force’s own host. Nothing is re-hosted here.

Most recently published release

3.0.0-beta8beta22 Oct 2026

Opposing-Force-1.21.1-3.0.0-beta8.jar · 2.9 MB · for 1.21.1 · NeoForge

Download this release
7b63ed8868f4…
Older versions12
  • 3.0.0-beta710 Oct 20261.21.12.6 MB69b88a9f9284…Get
  • 3.0.0-beta62 Oct 20261.21.12.1 MB5d24c049f977…Get
  • 3.0.0-beta51 Oct 20261.21.12.0 MB65f1e472aab3…Get
  • 3.0.0-beta41 Oct 20261.21.11.9 MBa03e8423494d…Get
  • 3.0.0-beta326 Sept 20261.21.11.7 MBf5bb1c4a5638…Get
  • 3.0.0-beta210 Sept 20261.21.11.6 MB197c4df1fd36…Get
  • 3.0.0-beta18 Sept 20261.21.11.5 MB5065f46cf950…Get
  • 1.20.1-2.0.37 Apr 20261.20.17.0 MB37.3k downloads9529e1a911e8…Get
  • 1.20.1-2.0.23 Mar 20261.20.17.0 MB6.2k downloads54ff4c182f0b…Get
  • 1.20.1-2.0.12 Mar 20261.20.17.0 MB497 downloads48953cd3d55f…Get
  • 1.20.1-2.0.01 Mar 20261.20.17.0 MB455 downloads78524d6b03fb…Get
  • 1.0.027 Jun 20251.20.12.2 MB22.1k downloads71821bab02bc…Get

Dependencies

What Opposing Forcedeclares it needs, from the author’s own release metadata. A required one has to be installed alongside it or it will not load.

Frequently asked

Does Opposing Force work on Minecraft 1.21.1?

Yes. 1.21.1 is the newest Minecraft version Opposing Force 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 Opposing Force 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 Opposing Force 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 Opposing Force 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 Opposing Force?

Among the supported Minecraft releases above, the highest recorded requirement is Java 21 or newer. Use the requirement for the exact Minecraft version you run; previews and snapshots may differ.

What does Opposing Force need to run?

It declares Curios API and Sinew as required, so those have to be installed alongside it or it will not load. Each one is linked in the dependencies section above.

What licence is Opposing Force under?

LicenseRef-Custom, 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 Opposing Force?

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 Opposing Force 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. When available, recorded download links go to the source for that release; verify the publisher, filename and any available checksum before running it.

Works on the same versions

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

Details from Modrinth, where the author last updated it on 22 Oct 2026. We do not host files or republish descriptions. Available download links point to the author’s own release.

Is this information wrong or missing something? .