Been playing Rise to Ruins lately.
It has the same elements as They Are Billions - create a home base, defend it against zombies - but the village simulator aspect of it is really involved and fun. Each villager has super basic sim stuff like moods and needs, and you have to balance them to ensure your village is productive.
And you NEED to be productive, because the moment you start on a map, “the corruption” begins to encroach, spawning zombies and ghosts and specters and ghouls to attack your village every night. Like most tower defense games, though, you can maze to let your towers rip them to pieces, and you can also spawn golems and do god powers to keep them at bay.
I’ve played it before, and fell into it pretty hard last time, but I’ve yet to finish a map. The corruption starts hitting your village HARD once it runs out of room to expand, and you want to keep them from expanding too much (buildings and campfires push corruption back as long as they are connected to your main building), so eventually you have to start building out a serious line of defense to protect yourself.
All the pixel art and sound effects are cute and soothing too, very Settlers-esque.