Minetest started as a FOSS version of Minecraft and has grown into an entire platform that you can run other games inside. It runs on Windows, Mac, FreeBSD, Linux, Android, and probably more. I've only given it a quick play but I've seen a few posts praising it for being what Minecraft used to be, so if you miss the good old days then this could be the game for you. There's already some good discussion about running it on a Steam Deck on this post (which points to this blog post).

Anyone played before and have any recommendations for good games to play?