demoncore.jar is an alpha file of the Minecraft mod DemonCore OPT for NeoForge, made for Minecraft 1.21.1. It was published on August 23, 2026 and is 0.1 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 DemonCore OPT mod page.
How to install: Put the .jar into the mods folder (.minecraft/mods) and start Minecraft with the matching mod loader profile.
