I came across this game when I read the announcement for the sequel. At first glance it seems like a Simcity clone, but it's actually a Transport Tycoon clone. And it's from Paradox, so it must be very difficult and hard to master.
There's a shipload of DLC as well, including
this beauty. If you don't understand why that isn't hilarious, you've probably never visited the Paradox forums
Anyway, Cities in motion 2 is on my watchlist.