supplementaries-1.21.1-3.9.7-neoforge is a release file of the Minecraft mod Supplementaries for NeoForge, made for Minecraft 1.21.1. It was published on September 3, 2026 and is 12.9 MB in size. For the full description, screenshots and every other version, visit the Supplementaries mod page.
How to install: Put the .jar into the mods folder (.minecraft/mods) and start Minecraft with the matching mod loader profile.
