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Picking up a retroid for emulation
(hexbear.net)
Tabletop, DnD, board games, and minecraft. Also Animal Crossing.
Rules
Not a Retroid specifically, but I do have a little experience with other SBC devices. Easiest way to set it up imo is through pre-made images downloaded from this site: https://www.arcadepunks.com/
I don't see anything specifically made for Retroid, but you can really just find any image that looks good and transfer the roms over. Also once you get the roms set up, there are some other useful sites like screenscraper.fr (to automatically scrape info, covers, etc.) and then retroachievements.org to add achievements to emulated games.