1.12-1.3.1 is a release file of the Minecraft mod Underground Biomes for Forge, made for Minecraft 1.12.2. It was published on January 4, 2019 and is 0.8 MB in size. For the full description, screenshots and every other version, visit the Underground Biomes mod page.
How to install: Put the .jar into the mods folder (.minecraft/mods) and start Minecraft with the matching mod loader profile.
