The legend of Undermountain has grown and grown. Known as the realms largest mass grave, it calls out to adventurers to come and explore its halls. Come and find vast amounts of riches, and large volume of monsters. This is the domain of the mad sorcerer-god Halaster. Undermountain is his domain but he welcomes all those foolish enough to enter. Many have found fortunes; few have survived to spend them. Will You?

This is MY version of sections of Undermountain. As the GM you will want to remove or modify anything you don’t wish to use. I have built my Undermountain on the premise of a place to be avoided. The change of a monster encounter is high. While a lot of my version plays with the players mind, as well as the characters, there are still numerous dangers to be found.

What you won’t find.
Maps to the existing material by TSR, Wizards of the coast. Details of the 2 box sets and modules pertaining to Undermountain. These are owned by Wizards Of The Coast and are subject to copyright laws. These are material I suggest picking up. The will give you the background of Undermountain and will provide needed information. Searches on the net will also give background material on the 7known levels and over 14 known sub-levels. I will only be provided the necessary information on Undermountain

What you will find here
On the following pages you will find information about use Undermountain in your Fantasy Hero campaign. Stats of monsters, magic items, traps and more. Maps to new levels and sub-levels will be given. While these will be in the Hero System format, their easily adapted to others. Most are considered, by those who found them and survived to tell about them, to be sub-levels. However, 2 are considered as true levels by the one that matters Halaster.

Remember, you will need to decide how you want Undermoutain to be in you campaign. How tough, how dangerous and how rewarding.

Necessary Background, Shortened

Halaster found and started exploring Undermountain centuries ago. While he was exploring and taking it over a town grew on top of the entrance, Waterdeep. He venture all through its vast halls and beyond. He started forming Undermountain into the complex it is today. With the help of his pupils he has made a vast and dangerous underground complex. Powerful magic gates keep it stocked with monsters from all over the realms. Some levels even have a sky and sun, rain and snow. Getting into Undermountain can be easy or hard, on purpose or out of the characters control. One can never tell