Opposing Force
by Barl Inc.
Opposing Force adds hostile mobs, worldgen features and a progression gate tied to the Nether and the End, for Forge and NeoForge on 1.20.1 and 1.21.1.
What it does
Opposing Force introduces a larger set of enemies to the world, with the goal of a fair but challenging experience. Some enemies stay out of the world until a player has entered the Nether for the first time or has defeated the Ender Dragon, which turns the mod into a progression gate that opens after both milestones.
The mod requires Sinew, and it is needed by Hostile Neural Network: Opposing Force. Environment is client and server, so the server and every player need the mod. Files exist for 1.20.1 and 1.21.1, with 2.0.3 as the latest Forge build and 3.0.0-beta7 as the latest NeoForge build on the beta channel. The code is not open source and is covered by a custom license.
Key features
Post-Nether and post-End gate
Some enemies spawn only after a player enters the Nether or defeats the Ender Dragon, pacing the world's difficulty.
Spawn mechanics
Mobs spawn through worldgen features in specific biomes and places, with a 2% chance that rises after failed attempts.
Configurable spawn rules
Spawn height requirements can be adjusted for most mobs, and spawn tags are read from datapacks.
Mob drops and tooltips
Most mobs drop crafted tools, items and decorative blocks, and item tooltips explain their mechanics.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Requirements
Dependencies declared by the latest file for each loader.
Required 1
Required by 1 mod
Questions
Does Opposing Force need Sinew?
Can the progression gates be turned off?
Where can Emerald Armor be obtained?
In the catalog
Opposing Force is one of 8,515 World generation mods on ModsFinder, and one of 5,058 World generation mods for Forge. 32,366 mods support Minecraft 1.21.1.
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What the author says
## 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…
Official listing
- Modrinth page
- modrinth.com/mod/opposing-force
- Owner
- Barl Inc.
- Published
- 2025-06-26
- Updated on Modrinth
- 2026-10-10
- Facts verified
- 2026-10-15