megastructureblock-neoforge-1.21.8-0.1a.77.jar is an alpha file of the Minecraft mod Megastructure Block for NeoForge, made for Minecraft 1.21.8. It was published on November 22, 2025 and is 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 Megastructure Block mod page.
How to install: Put the .jar into the mods folder (.minecraft/mods) and start Minecraft with the matching mod loader profile.
