The M&M installment with the best storyline.

But why should the connection to other parts of the series be evaluated as the interestingness of the plot? You can introduce new races and create an interesting game with a well-thought-out plot, or you can change nothing, but the plot will be weak, despite adhering to traditions. In my opinion, M&M8 didn't have an interesting, intriguing plot or a well-developed universe (compared to the 6th installment!:smile18:), and the validity of introducing new races is a secondary matter.