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!

Stonehell Dungeon: Into the Heart of Hell is the long-awaited sequel to Stonehell Dungeon: Down Night-Haunted Halls. This book contains the final levels of the megadungeon, revealing its most terrifying secrets. It contains almost 600 dungeon rooms for the players to explore, more than 70 unique monsters to challenge them, and 13 new magical items to mystify them. Stonehell Dungeon is a classic-style megadungeon intended for use with the Labyrinth Lord™ role-playing game, but adaptable to early versions of the original fantasy role-playing game and its retro-clones. It gives the game master the necessary information to run the dungeon, while offering enormous opportunities to customize the site. Published by Three-Headed Monster Games.

"Between a Dragon and His Wrath" is an adventure for a well-balanced party set in the lands of Nordmarr. Although the adventure is best set a generation after the War of the Lance, the DM should have little trouble placing it in other times in Ansalon's history.

Sharlo Tan was a sorceress. She was a scholar. She was a spy. And she left behind a legendary trove of treasure, guarded by riddles, secrets, and the passage of time. But it isn’t an ancient rumor that has the people of Rivesby on edge. The hobgoblins of the Lamellar Banner have encamped less than a day’s march away, and no one knows what has brought them out of their stronghold. In this richly detailed adventure, players can choose whether to play peacemaker or treasure hunter, explorer or exterminator. But they won’t be the only ones playing games, as they encounter creatures and NPCs who have their own conflicts and motivations. The Secret of Sharlo Tan is a mid-length adventure for levels 2-4 that easily plugs into any 5e campaign. It’s particularly suited to those who love witty books, solveable riddles, and nuanced interactions, but it readily accommodates smash-mouthed impatience as well. Depending on playstyle, it can fill 2-4 play sessions of 3-4 hours. The adventure includes: * 40-page fully illustrated PDF with player handouts * 3 stat blocks * 4 dungeon maps in DM and unmarked versions * 11 all-new magic items

For over a thousand years the things that lurk beneath the waters, skulk in the darkness and lie hungrily in dank crypts have been patient, while all around them men and monsters bicker amongst themselves, bold enough to traverse the dark caverns' depths but afraid or perhaps wise enough to leave the forgotten vaults and hidden passages alone. Beneath the lost ruins of ancient Thracia lie the vast caverns of a once great civilization. While a death cult rules the surface, the Minotaur King and his beast men lurk fall below. Descend even deeper into the darkness and discover a lost and arcane world that waits for those brave enough to enter! Necromancer Games and Judges Guild have teamed up to expand and update the classic module Coverns of Thracia for 3.5. Designed for characters of 3rd to 8th level and higher, the Caverns of Thracia is a mini-campaign setting that presents intricate plots and exciting adventures.

The heroes arrive at the eponymous Keep on the Borderlands, a fortress on the edge of civilization built to stave off the chaos and evil of the wilderness. Using it as a home base, a party can make forays into the surrounding wilderness, encountering monster and marauder alike. The centerpiece of the adventure is certainly the CAVES OF CHAOS, a network of tunnels and caverns found in the walls of a nearby but isolated ravine. It is here that hordes of evil humanoids have made their home. Through combat and negotiation, the players can try to explore and map out these caves, perhaps with the aim of accumulating valuable treasure or even cleansing the land of evil creatures. However, even the Caves are not all they seem. Beyond the goblins and kobolds lurk dark horrors: cults dedicated to fiendish chaos and a Minotaur's enchanted labyrinth await the unprepared adventurer. But for the hero who is brave, clever, and fortunate in equal and sufficient measure, great treasures and glory await in the Caves of Chaos that lie beyond the Keep on the Borderlands! TSR 9034

A new megadungeon from Three Castles Award Winner (2018) and Barrowmaze author Dr. Greg Gillespie! HighFell: The Drifting Dungeon is a 246-page classic megadungeon for use with any old school fantasy role-playing games/clone. The pages of HighFell are crammed full with new material, maps, and art, including a colour cover by Ex-TSR artist Erol Otus (that matches Barrowmaze Complete and The Forbidden Caverns of Archaia as sister-books). HighFell: The Drifting Dungeon will keep your players on their toes and your campaign going strong for years. HighFell is brought to you by the Old School Renaissance (so don’t forget your 10’ pole).

Dracula, the Lord of Shadow and Darkness, has covered the land in shadow and dispatched armies of monsters and undead from his magical castle. His armies threaten to overrun major cities and plunge the world into a literal Dark Age. The last of the vampire-hunting clan that traditionally opposed him has disappeared, and still the armies advance. He must be stopped. If that's not enough motivation, it is well-known that his castle is full of magical items and great riches... but also great danger. If you've ever wanted D&D and Castlevania to meet, look no further. This adventure is exactly what you wanted. Every area of the castle poses different and unique challenges to keep the party engaged and on their toes. Written for the DM as a ready-to-run adventure, it is designed for four to six characters. The adventure starts at level 3 at the outer defenses of the castle, and ends with the party advancing to level 13 after defeating Dracula in an epic battle. The adventure includes documentation to help even a new DM succed, including suggestions for how to run each of the area "boss" monsters in combat. There are approximately 50 new enemies and over 3 dozen new magical items. It also comes with a list of suggested music for many areas of the castle, and a 25-page campaign log recounting an actual tabletop play-through of this adventure from the DM's perspective.

The slave markets of Katapesh may be an unsavory sort of business, but the trade metropolis’s enigmatic law enforcers have few qualms with the legal act of selling and buying flesh. Other factions, including the abolitionist Eagle Knights of Andoran, have their own opinions on the matter, however, and frequently send undercover agents into dangerous territory to break up slave rings. When one such Eagle Knight goes missing while investigating an underground slave operation beneath the dilapidated Twilight Gate district, it’s up to the PCs to delve an abandoned (but hardly uninhabited) qanat beneath Katapesh and discover her dire fate. Yet not everything is as it seems in the dank slave caverns under Twilight Gate, and clues hint that the slavers may have even more loathsome connections than initially suspected.

The players are tasked by a mysterious Wizard's servant quest to recover the two gems of the Twofold Talisman: the Heart of Light and the Ebon Stone. The quest for the Heart of Light takes the adventurers to the Wizard's own mansion. Pgs. 43-54

The giants are only a half-mile away - straight up. Giants and humanoids that sail down from the heavens? Where could they be coming from? No base town or general area map has been provided, as this adventure can take place anywhere and can be easily integrated into any existing campaign.The DM should make sure that the town in which the PCs start is large enough to provide most anticipated supplies, spells, and services. This module is not a simple hack·and slay expedition. It also involves diplomacy and wit; if the PCs attack everything in sight, they may be destroyed. But the adventure is not entirely negotiation, for it has a good share of hearty dungeon exploration as well. Pgs. 4-23

In the Yatil Mountains south of Perrenland there is rumored to be a magical hoard of unsurpassed value, a treasure of such fame that scores of adventurers have perished in search of it. Find the perilous Lost Caverns of Tsojanth and you may gain the hidden wealth of the long-dead arch-mage-- if you live. Module S4, this contains a brief wilderness journey to the caverns, but the bulk is underground. The caverns are noted as a previous lair of the Arch-mage Iggwilv- though she is long gone, her Demonomicon remains. This module marks the first appearance of several monsters and items that would later appear in the Monster Manual 2 and Unearthed Arcana. A labyrinth features in the caves. TSR 9061

It's party time in Thyatis... And simply everyone is going to the magnificent Villa Osteropolus, home of the wealthy old senator, Helenites. Raucous fun, exotic food, and even advanced betting on the upcoming Arena games are expected. Even adventurers just in from the outlands may meet the powerful here. So don your festive togas, for in Thyatis City there are important connections to be made and deeds to be done, duels to be fought and fame to be won. (But beware, oh Adventurer! The politics of Thyatis can be as labyrinthine as mazes beneath the Coliseum...) This module is designed especially for the DM who wants to sharpen his interactive skills. Presenting the detailed layout of a Thyatian noble's mansion and maps of the multi-level Coliseum of Thyatis. Four four to six characters, levels 2-3 Brief guide to Thyatis legal system New optional class, the Rake Fast unarmed combat system, including disarming attacks Special appendix on creating Thyatian names Featuring the DM's Guide to Winging It TSR 9284

Gray Mountain lies deep in the lush elven forest. The temple there was a haven of meditation and learning - until taken over by an evil cleric known as the Rahib. Far under the mountain, he paces before the temple's great altar. A brown-robed servant rushes in and falls to his knees, trembling at the sight of the Rahib's black panther. "Rahib, adventurers came to the village as the sun rose - the strangers now protect Rahasia." A scowl crosses the Rahib's face. "I must have Rahasia! Attack again tonight." As the servant scurries away, a deep growl rises from the giant cat. Gripping the panther's leash, the Rahib paces again, speaking out loud. "We must dispose of these strangers quickly; the secret beneath the temple will not wait much longer." Note: the setting is unspecified, but certain tie-ins, like the wines, prefigure Ravenloft. See: https://twitter.com/chrisperkinsdnd/status/703751906703749120 TSR #9115

This adventure is the ninth part of the Shackled City Adventure Path that began with "Life's Bazaar" (Dungeon #97) Wherein a group of diverse and talented allies learns the folly of not working together against a common foe.

A town in Falkovnia finds itself stuck in a time loop that repeats the final hour before it is overtaken by a legion of undead. Only the PCs and a mysterious crone are able to remember the events of each cycle. The heroes must find a way to prevent the destruction of the town and stop the cycle of death!

This deluxe adventure takes heroes into the ruins of Gardmore Abbey, a monastery that was once the base of a militant order of paladins devoted to Bahamut. According to legend, the paladins brought a dark artifact back from a far crusade and stored it in their abbey for safekeeping, and evil forces gathered to assault the abbey and take it back. What the legends don’t tell is that this artifact was actually the Deck of Many Things, a force of pure Chaos. This adventure brings characters into the extensive dungeons beneath the ruins - dungeons that are warped and twisted with the raw forces of Chaos surrounding the cards of the deck.

An unusual pirate outpost on a small island is causing big trouble for the residents of coastal towns in more ways than one. A Minotaur clan have recruited outlaws and formed an alliance with Sahuagin in order to establish a pirate outpost on a formerly abandoned island and have begun raiding up and down the coast...

Two thieves' guilds fight to the death - with you in the middle. Run silently; the Midnight Stalkers are after you. Escape from the Tower of Midnight is an AD&D* game module for 2-6 thieves of 2nd-4th level. The Dungeon Master may change the names of the thieves’ guilds, countries, deities, and so forth to fit the individual campaign. Note that all player characters are assumed to have been imprisoned at the start of the adventure; little or no equipment will be available at first. This module is well suited for tournament use. Adventure Background It must be assumed, for the sake of the adventure to follow, that the PCs have no way of avoiding capture by the Midnight Stalkers. However, the DM may find a way to play out this adventure and have some or all of the PCs captured, allowing any who escape to attempt to rescue their comrades. Pgs. 16-27

A Planescape adventure for 4-7 PCs of levels 9-12 (about 60 total levels). While the module begins in the planar city of Sigil, most of the action takes place in Vudra, a layer of the Abyss. The PCs start in Sigil, tasked to find a vanished brother, and the trail leads to Vudra where the layers demonic ruler gathers magical blades for a terrible vengeance plot. Pgs. 32-58