Dwarf Fortress – randomly generated, persistent fantasy world
Not sure why Dwarf Fortress is on the front page, but I will always upvote.<p>If you're intimidated by ASCII visuals, consider wishlisting the graphics release, scheduled for Dec 6, 2022: <a href="https://store.steampowered.com/app/975370/Dwarf_Fortress/" rel="nofollow">https://store.steampowered.com/app/975370/Dwarf_Fortress/</a>