ExtremeReactors2-1.21.4-2.4.19.jar is a beta file of the Minecraft mod Extreme Reactors for NeoForge, made for Minecraft 1.21.4. It was published on January 12, 2025 and is 2.4 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 Extreme Reactors mod page.
How to install: Put the .jar into the mods folder (.minecraft/mods) and start Minecraft with the matching mod loader profile.
