Surely that is just the Kerbal Space Program-DLC?

Which ones don’t?

Can WiVRn be used to use the Quest headsets without a Meta account?

It’s your choice, and you can also allow other people to connect to it. The standard settings gives an experience that is close to the real game (as of WotLK), but you can tweak these settings to level faster or whatever you want. Depending on the implementation you go with, there are different ways to add new content - one of them (Azerothcore) is for instance very addon based and you can add bots or difficulty scaling to make things soloable for instance.

This might not help you understand more, but in case it is helpful:

I ran Season of Discovery through Lutris. If I recall correctly, it was easy enough to install Battle.net via an install script there.

I’ve been playing around with my own private server these days. For this I run the client directly in Bottles, which is a Wine prefix manager.

I still struggle to get Heroic to install pretty much anything, while Lutris usually works. I would want to use Heroic, but a prerequisite is that installed games actually launch and I have yet to understand why they don’t…

If you installed Steam from the software manager in Mint, you might have downloaded the Flatpak. Flatpaks are a particular way of distributing software which have their own pros and cons vs other ways of installing software, and you will eventually see many people hold strong feelings about this topic (whether or not to use them for instance).

But for now, in order to quickly check whether Steam is installed this way, you can install Flatseal through the software manager. Flatseal provides a GUI for efficient permissions management of Flatpaks. When you open it, it will display all software on your system that is installed in this manner. If Steam is listed there, then you have installed it has a Flatpak. You can then edit the permissions and try to set GPU Acceleration to allowed and see if that helps. If not, you have a different issue.

And for the record, using Flatseal is not a requirement for managing permissions of Flatpaks. You can do that through the command line as well. But it is indeed a quality of life improvement for me at least.

Are you running games via Flatpaks and have not given the Flatpak permission to use GPU acceleration? That has severly slowed down games on my similar AMD-based Minisforum PC. If you are, you can use Flatseal to easily adjust settings.

This is what I ended up doing. Works well, got it working both with standalone Dolphin and through Retroarch easily, and it even has this fun mouse mode that is cool for my living room PC (but that I still rarely use).

With direct Bluetooth I did get it working fine in Dolphin, but the Bluetooth range on the wireless chip was so poor that it was unreliable from my couch.