ModsJava
Simple motion detector
a mod that adds the famous Motion Detector from the movie Alien in a vanilla friendly way!
⬇ Download on CurseForgeThe author built this one for Minecraft 1.20.1 on Forge. On other versions it may install and then do nothing.
Verified by MCModsHub
- Ships as motion_detector.jar — drop this file into the mods folder
- Download size: 186 KB
- Download link checked 22 Aug 2026 — working
These come from our own check of the pack file, not from the source page.