
Modrinth · Minecraft mod
Regions Unexplored: Expansion
Remodels vanilla biomes to match the look of Regions Unexplored biomes
Quick answer
Which Regions Unexplored: Expansion release should I use?
Regions Unexplored: Expansion 1.0.1 targets 1.21.1 with Fabric, Forge, NeoForge. Do not install it on the client. It must be installed on the dedicated server. All 2 required mods have matching files.
Where it goes
Is Regions Unexplored: Expansion required on the client, server, or both?
Do not install it on the client. It must be installed on the dedicated server.
This file is marked server-only.
What else does Regions Unexplored: Expansion 1.0.1 need?
1.0.1. Change the file and its required mods may change too.
Install Regions Unexplored, Lithostitched first. We found matching files for this game-version and loader setup. 1 comes through another mod in the chain.
1 extra mod was pulled in by another dependency. Indented rows show who needs each one. We only count dependency files that match this setup. A file for another loader does not fill the gap.
Before you install it
Add Regions Unexplored: Expansion without breaking your instance.
Built for Regions Unexplored: Expansion 1.0.1. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use 1.0.1. It targets 1.21.1 with Fabric, Forge, NeoForge; another release may have different loader, side or dependency requirements.
- 02
Bring the mods it needs
Install Regions Unexplored, Lithostitched first. We found matching files for this game-version and loader setup. 1 comes through another mod in the chain.
- 03
Put it on the correct side
Do not install it on the client. It must be installed on the dedicated server.
- 04
Pick the file you checked
Use the “Get this file” button beside 1.0.1. It opens that exact file at the source.
About this project
What does Regions Unexplored: Expansion add?

Have you ever played a modpack with Regions Unexplored, but been bothered by how bland vanilla biomes looked in comparison? With this addon, most vanilla Overworld surface biomes will be brought up to par with with Regions Unexplored biomes. You will be able to find blocks, plants, and other features from Regions Unexplored in many vanilla biomes. Check out the gallery if you want too see a sample of this mod/datapack's vanilla biome overhauls.
Currently this mod only supports Regions Unexplored for 1.20.1, but support for other versions may be added in the future. This mod/datapack has so far only been tested for compatibility with Regions Unexplored, so I cannot guarantee compatibility with any other biome mods.
Feel free to use this mod/datapack in any modpack.
Credit to @.mo_mo from the Regions Unexplored Discord server and ebo2022 from Curseforge for their earlier work that this mod and data pack were based on.
Project description from Modrinth.
Pick your setup
Regions Unexplored: Expansion by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
1.21.1
3 loader builds1.20.1
1 loader buildCheck the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
Regions Unexplored: Expansion versions and loaders
1.0.1
RUExpansion-1.0.1+1.21.1.jar
13 Aug 2025
1.0.1
RUExpansion-1.0.1+1.20.1.jar
4 Jul 2025
1.0.0
RUVanillaBiomes-1.0.0+1.20.1.jar
16 Jun 2025
Looking for an older file? The official Modrinth project page is in Resources.