cos_mc-1.13.1-forge-1.20.1.jar is a release file of the Minecraft mod Creatures of SonariaCraft for Forge, made for Minecraft 1.20.1. It was published on December 9, 2024 and is 12.3 MB in size. For the full description, screenshots and every other version, visit the Creatures of SonariaCraft mod page.
How to install: Put the .jar into the mods folder (.minecraft/mods) and start Minecraft with the matching mod loader profile.