This guide is based on one I found here: https://verybadfrags.com/2019/04/14/play-age-of-empires-iii-on-linux/ It was done with the following system: Date: 2019-04-20OS: Ubuntu 19.04Steam Play Version: 4.2-3Graphics: Nvidia GTX 860m with proprietary driver This is to fix the error that you get when trying to run Age of Empires III: “Invalid CD Key! – Error loading the PID […]