A: Just go to legendsofzork.com, fill out the registration, activate it, and you are in. It will take you from there to Character Creation so you can make your first Character.
A: The Great Underground Empire.
A: Grues are things that live only in total darkness, so noone has ever seen one. If you ever find yourself in a place that is totally dark, leave immediately! If you do not you may be eaten by a Grue.