You know apon completion it tells you how much time you played the game? Mine was five hours and 4 minutes which is only a little below average. According to the reviews it lasts anywhere from 6-8 hours. But come on, it's got an achievement for beating the game in under 2 hours having found every item. It's not made to be extremely long. That doesn't count the proving grounds though, but I tried the first one and didn't really like it so it's not something I'll be playing. I didn't 100% the game btw and the fact that I just always followed the blue path without finding where I'm supose to go myself made the experiance much shorter then it would have been if I had explored the world myself trying to find where to go, if maybe that's what you did.