> Maybe you didn't know what you were doing?
Okay, I'm on Hacker News, what are the odds I don't know what I'm doing?
You don't "just install" Diablo IV on the Deck. You have to add the Battle.net Setup binary as a non-Steam app, or go through Lutris. I chose to not use Lutris and instead go through Steam which requires you to go to desktop mode, install it, and then change the paths from the setup binary to the Battle.net Launcher binary, which means going through the file system to look for it, and the paths could differ depending on whether you installed it on an SD card or the SSD.
Apologies for being defensive. I want to make sure people who read this thread take the positive reception with a grain of salt. I had to do all of this as a brand new Steam Deck user. All of this was made more complicated by a couple of UI bugs in the Steam UI and the fact that desktop mode has a bug where the keyboards and trackpads stop working randomly unless Steam big picture is enabled. I had to discover all of this through Google searches.
A couple more problems: one of the tutorials online forgot to mention you have to change the launch directory as well. That was about an hour wasted trying to figure out why Battle.net was not launching. Additionally, you can't download games with the screen off. That's because pressing the power button behaves like a computer, in that it makes the entire OS go to sleep. You have to literally keep your Steam Deck on in order for it to download the game.