ImmersiveEngineering-1.21.1-12.2.0-187 is a release file of the Minecraft mod Immersive Engineering for NeoForge, made for Minecraft 1.21.1. It was published on April 26, 2025 and is 12.6 MB in size. For the full description, screenshots and every other version, visit the Immersive Engineering mod page.
How to install: Put the .jar into the mods folder (.minecraft/mods) and start Minecraft with the matching mod loader profile.