modtweaker-4.0.1 is a release file of the Minecraft mod ModTweaker, made for Minecraft 1.12.1, 1.12. It was published on July 25, 2017 and is 0.1 MB in size. For the full description, screenshots and every other version, visit the ModTweaker mod page.
How to install: Put the .jar into the mods folder (.minecraft/mods) and start Minecraft with the matching mod loader profile.
