It's a very good game. I've spent many-many hours to find the gateways and dominate the islands. It's really exiting when you discover the area, find new resources and expand your territory. But the game begins to fail when you have to build ships and harbors. Sometimes the ships stuck in the harbor because the program can't calculate their way properly. It seems that they want to start their way through the land instead of the sea. This becomes more annoying when you have many harbors and many ships. They want to carry the resources to the new harbors but eventually more and more ships become unavailable with useful resources in their cargo bay and the new harbor never gets these resources. On some maps it is so unplayable that I stopped playing with this game.