Doors to the Unknown

Doors to the Unknown is a 2-edition Advanced Dungeons & Dragons adventure module. It is part of the Planescape campaign setting.

"Four doors of mystery appear in the Cage. They lead to four adventures. If a basher has the dark of them.

These aren't doors in the traditional sense, cutter, but they're portals just the same. They appear for a short time every 500 years, popping up in different parts of Sigil. Each hides a mystery that's waiting to be solved, and together they just might hold the key to a secret of the multiverse. All a body's got to do is tumble to the right keys, open the doors, and face down the Unknown.' -- Estavan, merchant lord

Doors to the Unknown is a collection of four Planescape adventures that can be played sepearately or as a mini-campaign. When four doors appear in the Cage, the barnies crawl out of the shadows, and the heroes get drawn into events that could have consequences for the entire multiverse. Each door leads to a different plane and a different deadly challege for the player characters. Together they offer a way to stop an ancient menace before it strikes again.

The Planescape Campaign Setting boxed set is required to run these adventures. The Planescape Monstrous Compendium Appendix (I and II) and Uncaged: Faces of Sigil are recommended to enhance play."

Description
Doors to the Unknown was written by Monte Cook and was first published by TSR, Inc. in 1996.

The adventure is designed for characters of levels 4 to 7 and takes place in the city of Sigil. The plot revolves around a series of mysterious doors that have appeared throughout the city, each leading to a different location in the multiverse. The players are tasked with investigating these doors, exploring the strange new worlds they lead to, and uncovering the mysteries behind their appearance.

The adventure is divided into several different chapters, each of which is designed to challenge the players in different ways. These challenges include battling dangerous creatures, negotiating with powerful factions, and navigating complex political situations.

One of the key features of Doors to the Unknown is its emphasis on exploration and discovery. The adventure is designed to allow the players to explore different planes of existence, each with its own unique challenges and dangers. The module also includes a wealth of background information on the various factions and organizations that operate within the Planescape setting, as well as numerous non-player characters with their own motivations and goals.

Overall, Doors to the Unknown is a challenging and engaging adventure module that is well-suited to experienced players and Dungeon Masters. Its unique setting, emphasis on exploration, and intricate plot make it a standout example of the creativity and innovation that characterizes the Planescape setting.

Synopsis
There are four 'blink portals' that appear in Sigil every 500 years and which last for two months. After this the portals disappear for another half-millennium. The overall aim is for the party to probe these portals and find out the secrets behind them. Rumors indicate that these doors lead to restricted planes, of hyper-real super-monsters, and that they were created by the god Aoskar when the Lady of Pain killed him.

Contents

 * Introduction
 * Prologue: At the Shattered Temple
 * The First Door: The Thuldanin Gargoyle
 * The Second Door: The Forgotten Vault
 * The Third Door: Logicus Prime
 * The Fourth Door: A Reality Beyond
 * Mercurial
 * Aftermath

Credits

 * Designer: Bill Slavicsek
 * Editor: Cindi M. Rice
 * Cover Artist: Robh Ruppel
 * Interior Artists: Adam Rex, Brian DeSpain, Tony DiTerlizzi
 * Cartographer: Roy Boholst
 * Typography: Angelika Lokotz
 * Border Artist: Robert Repp
 * Graphic Design: Dawn Murin, Dee Barnett
 * Art Director: Bob Galica
 * Project Coordinator: Karen S. Boomgarde
 * Electronic Prepress Coordinator: Dave Conant
 * Proofreading: Miranda Horner
 * Special Thank: Michele Carter, Ray Vallese