Just came across the site while looking for running ja on linux and throught I should pass along my knowledge regarding GOGs installers. (Note I don't work for them). All of GOGs installers are built with innosetup and can be extracted with innoextract. Specifically, -Download the installer (Whether it has the Galaxy installer or not doesn't matter) -Install innosetup (for debian based linux `sudo apt install innosetup` works.) -Change to the location where the downloaded exe exists. -run `innoextract [downloaded filename]` The files themselves will be in `./app/` Happy to help.