Naughtylus :archlinux: :gnome:
There's a few games I didn't know about and/or have yet to try on this list
https://lutris.net/games/?fully-libre-filter=on
It took me months to dig up half of the games on this list on my own, and although I do know some games that aren't on there, that's the best list of foss games I've found so far.
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