Star Kingdoms is a game about war and diplomacy. You should defend your own land while attacking other kingdoms (every successful attack will give you 5-10% of their land, depending on if someone have attacked that person right before you.) Use this land to build different buildings, which will make it easier for you to get a strong military force. A kingdom with 500 residences and 25,000 population will be able to train twice as many soldiers as a kingdom with 250 residences and 12,500 population, and he will also get twice as much money from taxes. Star Kingdoms has no real goals, so you will have to decide for yourself what you wish to do.

Some try to become no.1 in the universe, many persons who do not play quite as active will probably just try to stay alive until the game ends, and other ones are just playing because it is fun.
Each kingdom consists of a couple of different things, which you should get more and more of all the time. You can also say that the one who has the most of those and also is able to protect his kingdom from other persons attacks will be the one that "wins" the game:
•An army.
•Land and buildings.
•Civilians and Probes.
•Money.

For a short summary of the most important things of this guide, click here.