Awesome! Will definitely check it out. In case you haven’t seen it, here’s a nice collection of tips for indie game devs: https://develop.games
(I realize this reads as a bot comment, lol, but that’s a genuine tip, and that website isn’t even monetised as far as I know).
DCSS[1] would alone probably take five years to master.
Dwarf Fortress (although I haven’t really played it myself yet).
And, of course, Factorio, that with existing mods has probably enough content for the rest of my life.
This. There’s just so much game in that game.