Any city builder game that's actually difficult, and not just complex?

I'm also interested in colony sims and other similar kinda games.

I feel like most city building games instantly become super easy once you've figured out the mechanics.

But I'm looking for a city builder that is replayable for being difficult, and not one that just becomes all about optimization once you figure out all the mechanics.

I'm really intro difficult roguelikes, and I usually like starting over and over.

I dislike sandbox games, where you're supposed to "make your own fun". I rather have actual set challenges in the game, than playing endlessly and setting my own goals.

submitted by /u/drivercarr
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