I’m sure there’s a guide for it. All you need is either lutris or bottles and flatseal if you’re installing on the SD card.

It’s actually pretty easy with lutris and bottles. The same process that I do on my arch machine works on the decks desktop mode.

I switched to arch using qtile wm a few months ago. Couldn’t be happier. If a game doesn’t run on my rig either though stream or lutris well I just don’t play it, there’s way more games to discover and play.