theupsidedown-6.11.83-v.1.3.1-forge-1.20.1.jar is a release file of the Minecraft mod Larp24's Upside Down for Forge, made for Minecraft 1.20.1. It was published on January 1, 2026 and is 4.1 MB in size. For the full description, screenshots and every other version, visit the Larp24's Upside Down mod page.
How to install: Put the .jar into the mods folder (.minecraft/mods) and start Minecraft with the matching mod loader profile.
