It is divided into three chapters, and each one has a dominant theme. The first Chapter takes place in the Dungeon of Undermountain and is trap oriented, courtesy of Halasten, with lots of secret doors. So brush up on your trap finding and disarming skills for this one, or get someone to help, or you'll take a lot of damage. The second chapter moves down to the Underdark and has more story elements and various quests to take care of. The decisions you make will have repercussions for the concluding battle at the end of this section. Finally the last chapter is riddled with puzzles and will have you pulling leavers or working out other problems to get through the various areas. If you have the skills you can even make your very own golem companion and there's some romance too if you have the inclination to dally.​