Just this last month I played “Final Profit - A Shop RPG”: https://store.steampowered.com/app/1705140/Final_Profit_A_Shop_RPG/

An RPG Maker game with no combat, quite a lot of story that’s honnestly not bad and more custom systems than I expected RPG Maker being able to handle.

My understanding is that it was made by a single guy, which for the size of the game is fairly impressive.

You play as the Queen of the Elves trying to fight the embodiment of capitalism by becoming the very best capitalist. I believe there’s some branching to the story, but I only did one playthrough, which took about 20 hours.

For linux only, lan only shared drive NFS is probably the easiest you’ll get, it’s made for that usecase.

If you want more of a dropbox/onedrive/google drive experience, Syncthing is really cool too, but that’s a whole other architecture qhere you have an actual copy on all machines.