When playing Forge of Empires you will build your city. Start your history, lead an empire, and build your kingdom. You will lead it and develop new technologies. Wisely hand out decrees, lead campaigns and conquer new territories. From their you conduct trade in your kingdom and create more and more buildings. While their are many many game available such as: Elvenar, Fantasy Island Sim etc. The Strength of your army develop your social component. Play and go through several eras.
You must need to grow and strong your kingdom you must need money, gems, diamonds, and many more things. But these all thing make the game very difficult because you will do trade to earn money.