The Gates of Firestorm Peak

The Gates of Firestorm Peak is an adventure module for the second edition of the Advanced Dungeons & Dragons fantasy role-playing game. The book was published in 1996, and was written by Bruce Cordell, with cover art by Jeff Easley and interior art by Arnie Swekel.

Design
The Gates of Firestorm Peak incorporates the "Player's Option" rules into the adventure scenario, especially those from Player's Option: Combat & Tactics and Player's Option: Skills & Powers.

Plot
The Gates of Firestorm Peak begins in the Shirelands at the village of Longbridge, located in the foothills of the mountain range that contains Firestorm Peak. In prehistory, the Elder Elves thrived during a previous Age of the world, and created a magical laboratory under Firestorm Peak where they opened a gate to the Far Realm which opens every 27 years. Over time, the bizarre physical laws and alien madness of the other dimension began to warp the areas underneath the mountain. Three hundred years ago a colony of duergar settled nearby and became guardians of the corrupted area. Decades ago, the evil conjurer Madreus bypassed the duergar and gained mastery of the Far Realm creatures residing in the complex underneath Firestorm Peak. In the last five years, he gained control of the duergar, and his studies and experiments have begun to cause manifestations of warped behavior in nature and society to spread beyond the legendary mountain. If not stopped by the player characters, the gate will eventually provide Madreus with the energies and allies he needs to bring the Far Realm's madness to the rest of the world.

Reception
The Gates of Firestorm Peak was ranked the 11th greatest Dungeons & Dragons adventure of all time by Dungeon magazine in 2004, on the 30th anniversary of the Dungeons & Dragons game.