Simcity 4 is a good one for City building, for simulators I know a few
Computer Tycoon is a good one, very vague on what to do but fun once you get to know how to play it.
Euro Truck Simulator 2 or American Truck Simulator are good truck driving sims, if you like that.
The Rollercoaster tycoon series and Planet Coaster, they’re pretty good Rollercoaster sims.
SWAT 4 is a great SWAT simulator that is also really fun to play, again, if you like that sort of stuff.
I personally haven’t really played it, but apparently Jalopy is good, it’s mainly about cars though.