RT2 is one of the coolest "business simulations" of all time - the goal was to make profits. The simplification was the "business" was achieved by setting the game near the dawn of the industrial age - when there was more of a relation between work vs output. The goal was to connect cities/companies so economic activity could take place. The big obstacles were set at random (i.e. train breakdowns) that added the element of fun. The game took the player through "macro" settings like recession and booms.
My deep appreciation of the game also comes from the fact that the settings were largely historically accurate. The big industrial centers (Albany, Denver (for lumber)) were accurately depicted. An extremely engaging way to learn a lot of early U.S. history, regarding how cities came into existence (answer: based on commodities trade). Also fascinating to learn about tech evolution (engines!)
Customary hyperbole: One of the best "business simulations" ever made! :)