lostsoul-0.2.2.jar is a beta file of the Minecraft mod Undertale: Lost Soul for Forge, made for Minecraft 1.20.1. It was published on October 2, 2026 and is 35.8 MB in size. Pre-release builds can contain bugs — back up your world before installing. For the full description, screenshots and every other version, visit the Undertale: Lost Soul mod page.
How to install: Put the .jar into the mods folder (.minecraft/mods) and start Minecraft with the matching mod loader profile.
