ucc-2.0.0.jar is a release file of the Minecraft mod Unnecessarily Compressed Cobblestone for NeoForge, made for Minecraft 1.21.1. It was published on October 3, 2026 and is 4.6 MB in size. For the full description, screenshots and every other version, visit the Unnecessarily Compressed Cobblestone mod page.
How to install: Put the .jar into the mods folder (.minecraft/mods) and start Minecraft with the matching mod loader profile.