Undefined Lost World (Official) (Active Update!) is a release file of the Minecraft mod Undefined Lost World (Official)(DISCONTINUED) for Forge, made for Minecraft 1.20.1. It was published on May 9, 2025 and is 8.4 MB in size. For the full description, screenshots and every other version, visit the Undefined Lost World (Official)(DISCONTINUED) mod page.
How to install: Put the .jar into the mods folder (.minecraft/mods) and start Minecraft with the matching mod loader profile.
