Everyone starts the game with one isle which has to be extended, and for every extension raw materials are needed. There are 5 raw materials: gold, wood, stone, food and iron. To get these you need workers. You have to construct buildings and upgrade them to create more living- and working space. You can research and build and train units to defend yourself or to enlarge your island empire.
The tasks of the single buildings and units, their combinations and courses of war are explained in the following chapters.