The city in which the game is contained is fairly extensive and there are many characters to talk to. Arkhan also need to collect several items which can be quite difficult to find. Many potential inventory items are not visible, so you are forced to examine likely spots frequently in the hope of finding something useful. On the whole, most of the game requires talking to people to get information to lead you on to the next person. Sometimes they will mislead you.
Many quests are optional.
So you may find, on replaying, that you get to the end via a slightly different route. Early in the story, Arkhan is afflicted by the darkness and gradually it takes over his spirit. If Arkhan does not solve the problem in time, his spirit will be overcome and the game ends. In other words there is a time limit. Strategic combat will help Arkhan hold off the darkness long enough to keep going to the end.