A beautiful role playing game is Eve Online available at http://www.eve-online.com/. Its like a Star Wars fantasy game and the graphics are mind blowing . The downside- its so addictive that you are forewarned.
Also it employs economists who monitor the interactions of the thousands of people and millions of online interactions and take steps to ensure balance and fair play. Thus a useful simulation of people without the diruptive pain of the real world.