Opis-1.2.2a_1.7.2.jar is a release file of the Minecraft mod Opis, made for Minecraft 1.7.2. It was published on June 23, 2014 and is 5 MB in size. For the full description, screenshots and every other version, visit the Opis mod page.
How to install: Put the .jar into the mods folder (.minecraft/mods) and start Minecraft with the matching mod loader profile.
