QuarkEngineering-1.21.1-5.10.29.jar is a release file of the Minecraft mod Quark Engineering for NeoForge, made for Minecraft 1.21.1. It was published on October 30, 2025 and is 0 MB in size. For the full description, screenshots and every other version, visit the Quark Engineering mod page.
How to install: Put the .jar into the mods folder (.minecraft/mods) and start Minecraft with the matching mod loader profile.