"Builds an entire railway infrastructure"
Sid Meier's Railroads is a strategy game in which you'll have to get fully involved in the construction of railway tracks and all kinds of infrastructure needed for rail communication.
This game is all about laying the tracks; you'll often have to level the ground and knock down various obstacles. Joining two points is not always easy. In addition you will have to have your own trains to offer a service to the citizens, you will have to be careful with the routes that you believe since the company not only has to be viable, but that benefits are expected.
More than the building strategy in this game is important financial strategy and your nose for marketing and market research. If you're good, you'll make money and create a railway empire.