Primeval World
Primeval World is the name of the single-player tech demo. Its primary purpose is to test if the game can run on the player's computer.
An account is not required to launch Primeval World.
Differences
Primeval World consist of only one solar system which is randomly generated from one of the galaxies with the "Primeval World" flag. It is not possible to leave solar system, attempting to do so will crash the client.
It is not possible to found a city in Primeval World, the only interaction with sentient life is from villages.
It is possible to spawn in any item or vehicle using a menu. It is however now possible to spawn a spacecraft.