This material was originally published as two separate adventures, D1: "Descent into the Depths of the Earth" and D2: "Shrine of the Kuo-Toa." Contained herein are referee notes, background information, maps, and exploration keys intended for use with the Advanced Dungeons & Dragons rules. The adventure can be used alone or as part of an extended adventure that begins with G1-3: "Against the Giants" and continues with D3: "The Vault of the Drow" and Q1: "Queen of the Demonweb Pits." TSR 9059

The Underdark is a subterranean wonderland, a vast and twisted labyrinth where fear reigns. It is the home of horrific monsters that have never seen the light of day. It is here that the dark elf Gromph Baenre, Archmage of Menzoberranzan, casts a foul spell meant to ignite a magical energy that suffuses the Underdark and tears open portals to the demonic Abyss. What steps through surprises even him, and from that moment on, the insanity that pervades the Underdark escalates and threatens to shake the Forgotten Realms to its foundations. Stop the madness before it consumes you! Note for DMs: This adventure is not for the faint of hearted, to run or to play. The module starts with 10 NPCs traveling with the party through the grueling Underdark. This number can grow. The encounters within the book are often incredibly deadly for the characters that would be going through it. This is because the module expects them to run or talk their way through the events, or, in some cases, the module expects them to lose. If your players aren't the kind of party to run, talk, or surrender, do not get this adventure. The module almost requires that you use milestone leveling because the experience provided does not commonly get players to the levels they should be once they get to certain milestones in the story (7th when they leave the underdark, 15th when they face the demon lords.) Good luck and happy questing.

In the city of Waterdeep rests a tavern called the Yawning Portal, named after the gaping pit in its common room. At the bottom of this crumbling shaft is a labyrinthine dungeon shunned by all but the most daring adventurers. Known as Undermountain, this dungeon is the domain of the mad wizard Halaster Blackcloak. Long has the Mad Mage dwelt in these forlorn depths, seeding his lair with monsters, traps, and mysteries—to what end is a constant source of speculation and concern. This adventure picks up where Waterdeep: Dragon Heist leaves off, taking characters of 5th level or higher all the way to 20th level should they explore the entirety of Halaster’s home. Twenty-three levels of Undermountain are detailed herein, along with the subterranean refuge of Skullport. Treasures and secrets abound, but tread with care!

Having put down a rising of giants, it was discovered that the motivating force behind their depredations was that of long-forgotten evil - the Dark Elves. Determined to seek out these creatures, a body of doughty adventurers mounted an expedition to learn the strength of the Drow and bring retribution to them (DUNGEON MODULE D1, DESCENT INTO THE DEPTHS OF THE EARTH). This module contains background information, a large-scale referee's map with a matching partial map for players, referee's notes, special exploration and encounter pieces, a large map detailing a temple complex area, encounter and map matrix keys, and an additional section pertaining to a pair of unique new creatures for use with this module and the game as a whole. A complete setting for play of ADVANCED DUNGEONS & DRAGONS is contained herein. This module can be played alone, as the second part of a series of three modules (with DESCENT INTO THE DEPTHS OF THE EARTH, D1, and VAULT OF THE DROW, D3), or as the fourth part of a continuing scenario (DUNGEON MODULES G1, G2, G3, D1, D2, D3, and Q1, QUEEN OF THE DEMONWEB PITS). TSR 9020, From 1978

The Cave on Foggy Hook is the first of three connected adventures in the village of Hookholm and is aimed at busy or first time Dungeon Masters. This adventure is designed for 3-5 1st level characters and can be played in a single 3-5 hour session excluding character creation. In this adventure the party will find themselves in Hookholm, a small coastal village rebuilding after a devastating storm almost wiped it off the map. The village is located on the inner curve of the Foggy Hook, a spit of marshy land jutting into the Grey Sea. Beset by the sort of calamities that new adventurers will be able to sink their teeth into and will offer opportunities for roleplaying, puzzle solving, exploration and combat. Includes 5 maps in a number of variations, a brand new monster in the vicious Kuo-toa Feral, and a new chase complications table for chases through swamps or marshes.

A 20-page adventure for OSE Save the wizard! A sunken cathedral on a quiet mountain lake hides a long forgotten temple to Mathanoga, God of Knowledge and wizardry. Abandoned by Man for centuries , but protected by the legend of man-eating fishmen lurking in it. Or until a few weeks ago the young wizad Elric embarked on its expedition. With help from the accademy of Greykeep he found the temple and began to explore it, hoping to uncover its ancient magical secrets. Now the wizard is missing and the accademy has put a bounty on its head: its weight in silver to whoever will find him and bring him home alive and well. Find magical secrets! Deep inside the temple are stashed many magical items, all sacred to the fishmen dwelling there, all worth dying for. Save Elric and the treasures will be yours! The Sunken Temple is an expert level Old School Essentials adventure for a party of 1-4 players. Perfect for a one shot or a random encounter in an hex crawl.

As adventurers, you may think you have seen everything: certainly your skills have brought you through unimaginable dangers. But now you suddenly find yourself in a place unlike any through which you have traveled: astounding, dangerous, and even amusing things confront you as you journey, both indoors and outdoors, through unique and wondrous realm of Dungeonland. This adventure was first conceived by E. Gary Gygax as part of the Greyhawk Castle dungeon complex and has been the source of challenge and fun for many skilled players of the Advanced Dungeons & Dragons game. It is finally available to all players and can be added to your existing campaign with ease. "Dungeonland" is also designed so that it may be used along with its companion scenario, EX2: "The Land Beyond the Magic Mirror." Still, "Dungeonland" may easily be played on its own, and should offer hours of excitement in its strange landscape! TSR #9072

This adventure is designed for the D&D Adventures League Season 5 - Storm King’s Thunder campaign, and is meant to enhance your party’s connection to important events and NPCs. It is intended for use during Chapter 3 and 4, where your party is roaming the Savage Frontier, and has material enough for 1-2 full sessions. It brings your party in contact with the mysterious Kraken Society, and introduce them to the Golden Goose coin, which will make your players more invested in the events of Chapter 11: Caught in the Tentacles.

A missing mage... A ruthless band of kidnappers... A sinister conspiracy... Night Below, the first epic campaign adventure for the AD&D game, is designed to take the player characters from 1st level to 10th level and beyond. The PCs start as beginning adventures on a routine courier mission who soon become drawn into combating a sinister plot that menaces the pleasant land of Haranshire.

The Dark Tide of Damodan is an underwater rescue adventure, where time is of the essence. A mysterious disease is killing of locals and visitors alike in the port town of Havenword. While the adventurers are in town, Havenword is attacked from the sea by nasty fish-headed creatures. After the battle, the characters learn that the creatures dragged off several townsfolk. They have been tasked with finding the captives and returning them safely. The only problem...they were taken out to sea. The characters must delve into the depths into an underwater keep to rescue the captives. Using the knowledge the captives to help locate one another, all the while, avoiding the sinister Damodan's forces. Will the characters turn the tides in their favor? Or will they swim with the fishes? Published by Crit Academy

Ranked in 2004 as the single greatest adventure of all time by Dungeon magazine, this is a compilation of three series of modules: the G series "G1-2-3 Against the Giants" (G1 Steading of the Hill Giant Chief, G2 Glacial Rift of the Frost Giant Jarl, G3 Hall of the Fire Giant King), the D series (D1 Descent into the Depths of the Earth, D2 Shrine of the Kuo-Toa, D3 Vault of the Drow), and Q1 Queen of the Demonweb Pits. The characters begin by attempting to stop giant raids that have become prolific. They find out that the giant alliance is caused by the drow. They then descend into the Underdark in order to find the drow and stop their sinister plan. TSR 9179

Taag'thrith, born a gith but transformed into an illithid by ceromorphosis, has been finally found purpose: the assimilation & understanding of all knowledge. Taag'thrith plans to unleash a 10th level spell that will grant him just that-at the cost of all sentient life on the Material Plane. Will the heroes be able to traverse the dangerous corpse of a dead God, find Taag'thrith's aqueous lair the Eternal Spirals, & pit their foes against one another in order to destroy the foul lich once and for all? Or will they fall prey to the threats trapped within the Eternal Spirals & sink beneath the surface forever? They Came from the Deep is the second installment in Pretty Little Liches: a trilogy of adventures centered around three unique liches and their lairs designed for high-level play. These three lairs and the surrounding regions can be run independently as individual adventures or tied together into a mini-campaign that centers on the destruction of the Green Hand, an organization of dangerous liches.

"Fishing for Gods in Strade's Gallows" is a Dungeons and Dragons 5e module designed for 3-5 players at levels 2-3. This module features NPC dynamics where cordial manners and a polite smile matter just as much as sword-swinging prowess. Original monster entries and dungeon maps can be found in the appendices. A medical shipment to the swampy town of Strade's Gallows takes a turn for the eccentric when the party happens across enigmatic shrimp-men who begin to worship them as gods. Can the party solve the mystery of Strade's Gallows' ailment, or will their new disciples botch it all up? This module includes a list of songs which convey the mood of the setting. They are all online so it's easy to make a playlist.

TENTACLES. WHY DID IT HAVE TO BE TENTACLES? A colony of deep gnomes have had their main water source taken over by a group of kuo-toa, but are the fishy folk really the ones to blame for leaving the gem-loving svirfneblin thirsty?… This adventure was originally made for a West Marches campaign, but is designed to easily fit into any standard fantasy setting. There are many areas to insert plot hooks for your own world or campaign. A 4-hour adventure for 5th-7th level characters by ALAN TUCKER

"For Blibdoolpoolp!!" "The power of the mind and belief are wonderous, often leading us to manifest things that aren’t real. For the kuo-toa, this power is heightened, allowing their collective belief to manifest gods." Two tendays ago, a paladin of Torm was kidnapped by kuo-toa. In a strange turn of events, she was mistaken for a kuo-toa god, and whisked off to their underground lair. Barria has managed to pose as the god and now shakily leads a small faction of kuo-toa while trapped underground. With her influence being increasingly scrutinized, and with the different kuo-toa sects on the brink of civil war, it’s a dangerous time, even for a ‘god’… The heroes’ mission — rescue the paladin from the kuo-toa oceanic lair before she’s transformed into a kuo-toa god. The kuo-toa are an Underdark-dwelling race of fishlike humanoids. Different sects worship different god-like beings, each god manifested through the strength of a sect’s collective zeal. Such “gods” feature prominently in this adventure. Product Overview ♦ 4 to 8 hours for four to five characters. ♦ Scalable for 3rd-6th level. ♦ High-resolution maps of the Kuo-Toa lair. ♦ 9 new statblocks, including Dire Barnacles and Hypno-Cuddlefish! ♦ Includes plot hooks, handouts, rules for faction combat, and more!

The players get more than they bargain for when answering a night-time call for assistance from a mutual friend. Can they escape the githyanki prison known as the Crucible and find their way home from the Astral Plane? Designed for characters of 5th to 9th level, the Crucible can be played as a standalone one shot adventure, or as the first in a four part series of connected one shots that see the party fight their way to hell and back.

Agents of the fire giants of Maerimydra, a city in the Underdark, have overtaken the drow outpost of Szith Morcane. The factions seek out adventurers to free the outpost’s leaders for questioning on the giants’ activities. Can you extricate them before it’s too late?

A group of mysterious, sea raiders— capable of appearing from out of nowhere, striking, and disappearing— has terrorized a group of coastal states for some time. Now the leader of the states has asked the characters to infiltrate the raiders, find out how they operate, and put a stop to their activities. But once the heroes join the raiders, things aren’t as clear as they were led to believe. Will they succeed at their mission? Or join the raiders themselves? Pgs. 54-82

The busy port city of Jute’s Landing is built into the white cliffs of a deep, protected harbor. It is an important trade stop for many ships and merchants, but this was not always so. Long ago this quiet harbor was home to a coven of hags. Jute Windbrow killed two of the three when he and his crew claimed the harbor for themselves. Evanore, the surviving hag, has lived for more than 100 years in disguise while the city grew up around her. The legend of the heroic Jute Windbrow defeating the wicked monsters has grown as great as her bitterness and desire for vengeance.

The recent discovery of an entrance to the Underdark has set local leaders on edge. In a display of initiative, the First Lord of Hillsfar has ordered the construction of defensive structures surrounding what locals have begun to call "The Waydown." You have been charged with escorting an emissary back to his home in the Underdark without alerting the Red Plumes.