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!

Anea, the Amazon queen, and her warriors have helped neighboring king Eriklius defeat the usurper Todeuclis. When king Eriklius ascends the throne he covets the hand of Anea, but she refuses. In a fit of rage he sends his warrior Euclatis to destroy her palace and the surrounding town of Gythaclea. Anea—gravely wounded—pleads with Nyx, Greek goddess of the night. She asks for the power to take revenge. Her plea is granted, at the cost of being turned into a medusa. As rumors spread that Anea is still alive, the heroes are sent by King Eriklius to retrieve her. It seems an easy mission, but they soon discover all is not as it seems... Pgs. 157-163

"Gnolls have captured the heroes! After stripping the characters of all equipment except their armor and clothing, the gnolls drag them to an expansive briar maze known as the Twisted Thickets and set them loose. Then, armed to the teeth, the gnolls hunt down their prey. The characters must survive the hunt and outwit their pursuers. After dealing with the gnoll hunters, the heroes can try to reclaim their lost equipment and exact revenge on the tribe, which lairs in the caves beneath Dead Gnoll’s Eye Socket."

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.

Nearly 100 years ago, Lord Eriador wrested the lands from the hands of evil and began a reign of unsurpassed courage, wisdom, and might that lasted over three centuries. One day this great man of valor was called onward to continue his battle for freedom and goodness on a higher plane of existence. Leaving the responsibilities of rulership to his faithful overseer, he donned his magical shield, helm, and sword and traveled to the Holy Maountain of Anduin to meet his destiny. Eriador left the overseer with this solemn promise: if there ever arose a time of great need, he would answer a summons from the Mountain of Anduin to come back to vanquish any evil that dared to oppress his people. It is now the reign of the third overseer. For years now, an evil mage has been plaguing the land by sending forth hordes of evil humanoid minions to oppress the people. The overseer has been forced to pay tribute to the mage to protect his people. Life has become nearly unbearable for his subjects. It has been over five years since the mage desecrated the holy mountain by placing foul creatures in its depths to guard against the possibility of the people seeking help from their nearly forgotten champion. A fortnight ago, your party was gathered in a secret council chamber to meet with the overseer himself. You felt a spark of hope for the people of this land as the overseer told the legendary tale of Eriador. He gave you the equipment you need and charged your party with the task of venturing into the heart of the now monster-infested Mountain of Anduin to call back the people's great hero, Eriador the Paladin. Although the three parties sent before you had not returned, ridding the of the land of the mage seemed worth any risk, and you eagerly set out on your quest. Now, standing before the defiled mountain, you wonder if perhaps you were too hasty.

A shadow from the past, the Ghost Tower of Inverness has loomed ever larger in the mind of the great Seer of Urnst, Now he has convinced the Duke that an expedition should be organized to go to the ancient keep and recover its greatest treasure — the fabled Soul Gem. TSR 9038

The lost city of Archaia - an ancient ruin sunken into the earth - lies deep in the badlands. In recent years, caravans from Eastdale have come under attack from orcs, goblins, and worse. Some say these blood-thirsty warbands have made lairs in the deep caves and ruins. Sill others say the ancient halls are filled with magnificent treasures left by the Archaians. Are you brave (or foolish) enough to delve The Forbidden Caverns of Archaia? The Forbidden Caverns of Archaia (FCoA) is a 296-page classic megadungeon for use with any old school fantasy role-playing game. The pages of Forbidden Caverns are crammed full with new material, maps, amazing art (including special surprizes by former TSR artists), as well as an amazing colour cover art by Ex-TSR artist Erol Otus that matches Barrowmaze Complete as a sister-book. The Forbidden Caverns of Archaia will keep your players on their toes and your campaign going strong for years. FCoA is brought to you by the Old School Renaissance (so don’t forget your 10’ pole).

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

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

The Golden Dragon, conceived as a skyfaring warship, now serves as a symbol of peace among the Five Nations. Even before the luxurious airship embarks on its maiden voyage, nefarious pirates, thieves, and saboteurs conspire to defame, steal, or destroy it. Resourceful adventurers are needed to protect the ship and its passengers, but can they uncover the secret enemy lurking in their midst? "Voyage of The Golden Dragon" is a stand-alone adventure for the Dungeons & Dragons game that immerses your characters in the Eberron campaign setting. Designed to challenge 7th-level characters, it takes heroes on a perilous journey from Sharn to Stormreach and also serves as a launching pad for adventures the world over.

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

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).

The Iron Route, an important trade road east of Phlan, is beset by competing bandits. An exiled Black Fist officer leads his band of mercenaries turned cloaked ruffians, while a mysterious dragonborn sorcerer commands screaming savages from the north. In this war over the trade route, the beleaguered merchants are the victims, and Phlan suffers from a lack of supplies. It’s up to adventurers to strike out and reopen this vital route.

In this adventure, the PCs discover that not all souls rest easy, particularly those spirited away to Nightwyrm Fortress. To learn the truth, players must pierce death's veil itself and enter the Shadowfell, where sinister echoes of life wing through eternal gloom. This adventure can be run as a stand-alone adventure or as Part Three of a three-part series of adventures (starting with P1 King of the Trollhaunt Warrens(TM) and P2 Demon Queen's Enclave(TM)) that spans 10 levels of gameplay.

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

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

"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.

Lots of stronghold assaults and shipboard travel/encounters in this one. This adventure's deep political basis might be seen as an introduction for the domain-focused adventures of Companion-level play. This adventure is for use with the Dungeons & Dragons Basic, Expert, and Companion Rules, and includes the intrigue of engaging with nobility's lands and agendas. Intro: All is not well in the kingdom of Vestland. Not only is the king dead and the holy Sonora Crown missing, but the heir to the kingdom was lost at birth and no on knows where to find him. As if this wasn't bad enough, the forces of the Ethengar Khanate, never on the best of terms with Vestland, are now massing on the borders, hoping to take advantage of Vestland's plight. To complete the rosy picture, traitors from within also threaten to speed the downfall of the High Kingdom. Sounds like a job for you. You must find the long-lost heir to the kingdom and recover the Sonora Crown, the mystical device without which a king cannot be crowned. Standing in your way are traitors and spies from within and invaders from without the kingdom of Vestland. Time is running out! Can you save Vestland from disaster? TSR 9218

An exclusive party at an illustrious antiquities museum. A missing benefactor and host who turns up dead. A missing mummy, the crown jewel of a new exhibit, and a hardboiled detective trying to make sense of it all. And a party of adventurers caught right in the middle! Welcome to the Lucaryen Museum of Antiquities, enjoy your visit. We recommend for your safety not to wander the halls at night; some of our exhibits have a habit of coming alive and attacking the unwary. Not to mention other guests who may have something damming to hide, and a loose set of morals. Don’t worry - I’m sure you’ll be fine! In this pulp thriller mystery one-shot, your players will be thrust into the role of Occult Detectives, investigating the murder of the museum’s namesake and searching the premises by night to uncover clues and the whereabouts of a missing mummy. Inspired by films such as Night at the Museum, The Mummy, and classic ‘Whodunnit’ murder mystery tales, your players are sure to have a killer time! Featuring: 15 pages of content, comprising 4-8 hours of play A full-scale, two story museum for your players to explore Shady NPC suspects and unlikely allies, complete with unique stat blocks Myriad potential encounters and one epic final Boss Fight, with 46 unique creatures from the Monster Manual, Volo’s Guide to Monsters, and Mordenkainen’s Tome of Foes Helpful tips for newer DMs

Odyssey of the Dragonlords is heavily inspired by stories from ancient Greek mythology. As we designed the campaign, we sought to include ideas from many different sources: The Odyssey, The Iliad, Jason and the Argonauts, The Oresteia, and others. However, Thylea is not ancient Greece. You will not find Zeus, Athena, or Apollo among the gods. As you explore Thylea, you will encounter familiar tropes, monsters, and treasures from Greek mythology—but the rules are different here. Mortals have only recently come to these lands. The world of Thylea blends high fantasy with the trappings of ancient history. Elves, dwarves, and halflings now live alongside minotaurs, centaurs, and satyrs. Our goal is to make your party feel like heroes from one of the greatest stories ever told—but the ultimate end of that story is entirely within your power. Your players will make choices that forever change the world of Thylea. As the gamemaster, we encourage you to embrace this idea and run with it. How will your players reshape history—and what does it mean to be a hero?