If you download an app called Lutris in desktop mode (there’s a good youtube video on how to do this for diabolo ) this basically allows you to download Battle net, then you can download diabolo 4 and then add it as a non steam game and play it straight from gaming mode
If you download an app called Lutris in desktop mode (there’s a good youtube video on how to do this for diabolo ) this basically allows you to download Battle net, then you can download diabolo 4 and then add it as a non steam game and play it straight from gaming mode