I’m interested in buying a Steam Deck purely to run FOSS games, e.g. OpenTTD, 0ad, Minetest, Torcs etc.

What is the experience of playing these games on the Steam Deck? Do they work out of the box with the controllers on the device?

Additionally - does anyone have any experience running a standard distro (e.g. Debian, Arch) on the Steam Deck, without installing a lot of Steam Deck specific cusomisations?

I’m guessing there are a lot of patches that have not been upstreamed or not made it into certain distros yet - does anyone know of any resources to show what contributions have been upstreamed and which are still outstanding?