SimCity (2013) plays a good early game, but it's really not long until you run out of space because for some bizarre reason Maxis decided to create highly restrictive city limits that mean you can only really build a glorified town at best.
SimCity 4, however, is a different story. Sure, it might look a bit dated now, but at least you can build the expansive metropolis of your dreams. And it's super cheap. Ignore the Mac sign, PC owners -- Steamworks means you'll be able to redeem this on Windows too. Cheers jaystan!