Probably my favorite type of game, I've played dozens of them but I'm always looking for something good I might have missed. My personal favorite for the past few years has definitely been Farthest Frontier but theres been a ton of good ones. And if anyone else is looking for recommendations let me what you like and I probably know something that fits.
I've played some Going Medieval recently. Essentially the same format as Rimworld, the more stuff you have in your settlement the stronger parties of enemies get sent at you semi-regularly. It doesn't really do anything especially unique but I think it's a competent and fun approach to the format.
I wanted to check that one out but the cracked version doesn't play nice with linux for some reason.