All passed worlds have been connected by portals, that is how the Chain of Worlds has been created.
The player will find out the answer during the spectacular single player campaign in Perimeter: Emperor's Testament. Secretly the Emperor creates the Mechanical Spirit - a super mechanism to help him discover new Worlds." Who is Messiah judge or a puppet? The ones who call themselves the Spirits - new pastors of the human race, believe that a new planet, suitable for living, will be found in the Psychosphere, Colossal towns-arks, carrying hundreds of colonists, have been traveling for centuries through hostile worlds of Psychosphere under the guidance of Spirits. Their destination was the New Earth that was to replace their old home.