Basically, it's a D&D adventure played out using a DVD. Every five minutes or so, the viewer is required to choose what the adventuring party does - do they fight, or do they run? Will you steal, or use brute strength? Your choices directly influence the path the adventurers follow, with 4 different endings to their quest.
The voice acting is pretty good and when there is combat it can get pretty intense because you really don't know if the party will survive! I have to admit a great wave of relief washed over me as Regdar delivered the killing blow to one of the enemies I chose to fight.
Unfortunately the visuals are an eyesore. 3D models were not so great back in 2003 and it really takes away from the adventure.
Worth playing through at least once, start to finish is about 40 minutes, I think I spent about 3 hours with it going through all the paths and reaching the different endings.