

The side quests (there's not many of them but they're there) does not detract from his mission overall.

And he doesn't want to lose sight of that, initially. There is a sense of urgency in Edge's quest because he has one goal in mind - revenge. The progression of the game is logical and makes sense. I don't want to ruin it but all I can say it starts off with a typical tale of revenge but oh boy.

It leaves a lot to the imagination but the world itself is so interesting and captivating.
