I am trying to make a fairly long and involved quest for some friends of mine. I would like to change the begavior of the camera in the game by taking control away from the players. The camera should float behind their shoulders and not allow them a bird's eye view of the game. This means that players will have to watch each other's back while playing to prevent monsters from sneaking up on them.

Is there a way to do this?

I don't think so...
The only way you can manipulate the camera movement is with a machine from within the queditor, and you can only make things like Audren's song (when you toss some coins in the hat in town).

Malleus