ModsJava
Regions Unexplored Biome Book Compat
Java mod listed for Minecraft 1.21. Downloads from the MC Java Mods app on Android.
This mod adds the regions unexplored biomes to the biome book mod. Free Minecraft Java mod for 1.21.
⬇ Download on ModrinthThis mod adds compatibility between Regions Unexplored and Biome Book
Quick facts
- Edition: Minecraft Java
- File type: .jar
- Minecraft version listed: 1.21
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: Opens on Modrinth — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.
File checked by MCModsHub
- Ships as biomebook-ru-1.0.0.jar — drop this file into the mods folder
- Download size: 49.9 MB
- Download link checked 19 Oct 2026 — working
These come from our own check of the pack file, not from the source page.