Your primary quest is to find the fragments of, make whole again, and activate, the SPHERE of Q'Li [whose nature is never explained - nor is your reason for being here in the first place]. However, there are other sub-quests which you must complete...
Notes
The GACed Amstrad version was originally published by Dragonsoft before being re-released by The Adventure Workshop.
The game was later converted to the Spectrum using the PAW.