According to the "Aim of the Game" text on the reverse side of the inlay, this game follows on from Nonterraqueous 2 (Soul of a Robot) (after the destruction of the evil computer).
In this game you must actually collect 'Psyche' - in the previous Nonterraqueous games, you already have 'Psyche'.
There are 42 planets to explore, in Nonterraqueous there were 42 levels to explore.
You control the 'Seeker MK II' - the original 'Seeker' was in Nonterraqueous.
One of the planets is named Nonterra.