IndustrialUpgrade-1.21.1-3.4.0.12 is a release file of the Minecraft mod [IU] Industrial Upgrade for NeoForge, made for Minecraft 1.21.1. It was published on July 19, 2026 and is 35 MB in size. For the full description, screenshots and every other version, visit the [IU] Industrial Upgrade mod page.
How to install: Put the .jar into the mods folder (.minecraft/mods) and start Minecraft with the matching mod loader profile.
