
Modrinth · Minecraft mod
Opposing Force
A mod that aims to introduce a wide variety of enemies to Minecraft!
Quick answer
Which Opposing Force release should I use?
Opposing Force 1.20.1-2.0.3 targets 1.20.1 with Forge. Installation on the client is optional. Installation on the dedicated server is optional. No extra mods listed for this file.
Where it goes
Is Opposing Force required on the client, server, or both?
Installation on the client is optional. Installation on the dedicated server is optional.
The source marks this as usable on both the client and server.
What else does Opposing Force 1.20.1-2.0.3 need?
1.20.1-2.0.3. Change the file and its required mods may change too.
This file does not list any required mods. Do not add a library just because a different file uses it.
This file does not list any required or optional mods.
Before you install it
Add Opposing Force without breaking your instance.
Built for Opposing Force 1.20.1-2.0.3. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use 1.20.1-2.0.3. It targets 1.20.1 with Forge; another release may have different loader, side or dependency requirements.
- 02
Bring the mods it needs
This file does not list any required mods. Do not add a library just because a different file uses it.
- 03
Put it on the correct side
Installation on the client is optional. Installation on the dedicated server is optional.
- 04
Pick the file you checked
Use the “Get this file” button beside 1.20.1-2.0.3. It opens that exact file at the source.
About this project
What does Opposing Force add?

About Opposing Force
Opposing Force is an enemy mod that focuses on adding unique, fair and challenging enemies to your world, along with a variety of miscellaneous features. A major change Opposing Force will bring to your world is the introduction of a Post-Nether and Post-End progression gate.
Certain enemies will only spawn after:
- Entering the Nether for the first time
- Killing the Ender Dragon for the first time
These events are per-world and one player triggering the event will trigger it for all players in a server. These progression gates can be disabled in the Sinew config, and are also data driven, so you can use a datapack to edit the post_nether_spawns and post_end_spawns tags.
Mobs in Opposing Force may spawn from worldgen features, in specific biomes, or in other specific places. You can configure the spawn height requirements for most of the mobs in the mod. The Skyvern has a special spawning mechanic, where it has a 2% chance to spawn every 30 seconds (15 seconds if it is raining), where the chance increases by 2% for every failed spawn. The chance and spawn attempts are individual per player. Another example is the Tart, which can spawn from an Infested Apple Tree, a worldgen feature. Most mobs in Opposing Force have drops, which can be crafted into tools and items or decorative blocks. In the future, we will have tooltips on these items explaining mechanics that might not be obvious. Opposing Force also adds features that do not come from mob drops. For example, Emerald Armor can be obtained from Wandering Traders.
Mod Loader and Version
This mod is currently being developed for NeoForge 1.21.1. No backports are planned.
Project description from Modrinth.
Pick your setup
Opposing Force by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
1.20.1
1 loader buildCheck the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
Opposing Force versions and loaders
3.0.0-beta6
Opposing-Force-1.21.1-3.0.0-beta6.jar
2 Oct 2026
3.0.0-beta5
Opposing-Force-1.21.1-3.0.0-beta5.jar
1 Oct 2026
3.0.0-beta4
Opposing-Force-1.21.1-3.0.0-beta4.jar
1 Oct 2026
3.0.0-beta3
Opposing-Force-1.21.1-3.0.0-beta3.jar
26 Sept 2026
3.0.0-beta2
Opposing-Force-1.21.1-3.0.0-beta2.jar
10 Sept 2026
3.0.0-beta1
Opposing-Force-1.21.1-3.0.0-beta1.jar
8 Sept 2026
1.20.1-2.0.3
Opposing-Force-1.20.1-2.0.3.jar
7 Apr 2026
1.20.1-2.0.2
Opposing-Force-1.20.1-2.0.2.jar
3 Mar 2026
1.20.1-2.0.1
Opposing-Force-1.20.1-2.0.1.jar
2 Mar 2026
1.20.1-2.0.0
Opposing-Force-1.20.1-2.0.0.jar
1 Mar 2026
1.0.0
Opposing-Force-1.20.1-1.0.0.jar
27 Jun 2025
Looking for an older file? The official Modrinth project page is in Resources.