The first time the aliens visited Earth before our era. They built here the great pyramids and other objects that belong to the miracle of the world. However, it took them a very long time. Take your time at that time and take part in these magnificent extraterrestrial buildings. At your disposal will be several resources, the main of which is the workforce. If you are building a building, the growth rate of resources is rapidly increasing. To begin with, only a few buildings are available to you, as soon as you go into growth, you will discover new more powerful ones.