When was the first time you played it? Maybe you haven't yet.
Personally, I didn't get into Bionicle until late 03' early 04'. So I never really got the chance to play it, until about a year and a half ago when I finally rediscovered bioncle...Loooooong story. Anyway I was bored out of my mind in science class so I looked up "Bionicle games" and found MNOG, so for that whole school year whenever the teacher wasn't looking or I had a chance, I played it. EVERY DAY. IN EVERY PERIOD, yes I know I was addicted. But I believe being addicted to a game like MNOG was a good thing.