The King is dead! And the queen is in trouble. She has chosen you to find the fabled heartstone, which is buried somewhere deep in the Mountains of Ice. Is the gem I the hands of the corrupt Master Thief? Has he harnessed its powers for his own vile purposes? Or does it lie unguarded in the frozen ranges to the north, which teem with horrible creatures? This is your kind of quest! Quest for the Heartstone is a combined wilderness/dungeon adventure designed to be compatible with the Advanced Dungeons & Dragons Action Toys from LJN Toys, Ltd. and the Advanced Dungeons & Dragons Fantasy Adventure Figures from TSR, Inc. The adventure also includes complete maps, new monsters and players' illustrations. Will the heartstone be the key to peace in the kingdom? By her majesty's request... it's up to you to find out! TSR 9114

Hunt for the Thessalhydra is a short adventure published by Wizards of the Coast as a tie in to the "Stranger Things" franchise and part of the Stranger Things Dungeons & Dragons Starter Set. The adventure features characters, locations, and monsters inspired by that series. The adventure is suitable for characters of level 3-5.

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!

On the border between Anuire and the land of the Khinasi, the Three Brother Mages fight an ancient and immortal awnshegh, the Chimera. The game of cat and mouse has recently begun to draw regents from the entire region. Rumors say that the blade of the last Anuirean emperor, the Sword of Roele, has been tracked to the Chimera's domain, the Chimaeron. The fact that the Gorgon's armies are mustering in Kiergard seems to support the rumor. But choosing sides between the Chimera and the Three Brothers is not easy matter. If the chimera drives the Brothers out, the trade routes through the Chimaeron may be sealed, leaving the seas free for the Khinasi to monopolize trade. If the Brothers drive the Chimera from the magical sources that give her strength, they may establish a beachhead for the Khinasi traders, who are slowly gobbling up the lands of Anuire just as their own lands were once annexed by the empire long ago. Who will you and your comrades ally yourselves with? Who is the true enemy? Can you recover the Sword of Roele before anyone else does, and lay claim to the Iron Throne? This Birthright adventure is suitable for use with any party of three to six characters of levels 5-8, including at least one regent. You must have a copy of the AD&D game rules, the Birthright campaign setting, and the Cities of the Sun campaign expansion to play. TSR 3118

The ruined siege castles outside Absalom have long beckoned adventurers looking to make a name for themselves. Now an earthquake has cracked open one of these fabled ruins, and its lost mysteries and fantastic treasures lie exposed for the first time in centuries. But the tower's empty halls once more echo with living footfalls, and a new master has claimed the Fallen Fortress as his own.

A level 2–3 sewer adventure by Glynn Seal. PCs plumb fetid sewers and recently-revealed secret halls, in search of a lost worker. In these forsaken chambers, they may find answers and treasures, but may also come face-to-face with a bloated monstrosity and its depraved followers. For Old-School Essentials (OSE) Included as one of four adventures in "Old-School Essentials Adventure Anthology 1"

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

This material was originally published as three separate adventures: G1 (STEADING OF THE HILL GIANT CHIEF), G2 (THE GLACIAL RIFT OF THE FROST GIANT JARL), and G3 (HALL OF THE FIRE GIANT KING). Contained herein are referee notes, background information, maps, and exploration keys for three complete adventures using the ADVANCED DUNGEONS & DRAGONS rules. This module can be used alone or as the first in a series of adventures that includes Dungeon Modules D1-2 (DESCENT INTO THE DEPTHS OF THE EARTH), D3 (VAULT OF THE DROW), and Q1 (QUEEN OF THE DEMONWEB PITS). TSR 9058

Arcanamirium transmuter Maren Fuln found a magically sealed amulet in the school's library and kept it as a shiny bauble. Little did he know the amulet contained an entity far worse than he imagined, and by unsealing it, he loosed a revenge-obsessed horror into the sewers beneath the school. Can the Pathfinder Society halt the beast’s plan in time, or will he build his army of revenge and sow chaos in Absalom?

You wake up in a pitch-dark cavern... The stench of bodies fills your nostrils. The crack of bone and the sound of teeth rending flesh are the only sound you hear. Something is feeding nearby...something you can't see. We Eat in the Dark is a deadly adventure for 3rd or 4th level characters. Navigate the caves of the Darkshard Abattoir, where light sources are muted and creatures hid invisibly in the dark. Fight for your life against troglodytes empowered by a mysterious artifact and other cavern hazards. Includes an appendix for limited starting gear for a more lethal challenge. A perfect murder-happy one-shot for your players to question your friendship.

Important: The adventure is 1e but it has monster conversion notes for D&D 4th edition The town of Highport, once a human community overlooking Wooly Bay from its perch on the northern coast of the Pomarj, fell prey to hordes of humanoids swarming out of the jungle-covered hills surrounding the settlement. Though the orcs, goblins, kobolds, ogres, and gnolls razed much of the place in their ferocious rampages, the smoldering ruins they left behind soon became a new kind of community, a place of trade between the humanoid “locals” and the unsavory human traders who have no compunction about doing business with them. Slaves are a commodity in ready supply in Highport’s market, since many pirates raid up and down the coast of the bay, putting fishing villages to the torch and filling their holds with captured refugees. Slavery has become a thriving business in the town, and rumors abound of a cartel of Slave Lords who run things from behind the scenes, filling their coffers in secret from the buying and selling of human chattel. The trade has become so prolific that the good folk to the north have grown tired of these depredations and decided to fight back. Forces of righteousness and honor have recently descended upon Highport, some openly and others in secret, in various attempts to destroy the machinations of the Slave Lords and abolish the abominable enterprise that has taken far too many loved ones from home and hearth. One such doughty servant of goodness is Mikaro Valasteen, a cleric of Trithereon. Mikaro slipped unnoticed past the crumbling walls of Highport with a single mission: to rescue and transport as many slaves to their freedom as possible. Mikaro and a handful of faithful assistants located a number of escaped slaves—as well as rescued a few more not sufficiently restrained and guarded—and shepherded them through the gates and beyond the reach of their humanoid tormentors, returning them to their lands and homes. This covert freedom brigade enjoyed remarkable success early on, since the servants of the Slave Lords were often lax in their vigilance and sloppy in their efforts to prevent loss of the “merchandise.” After one too many shipments never made its destination, the humanoids stepped up their security and the normal channels of escape from Highport closed to Mikaro and his team. He cannot risk exposure by smuggling the freed slaves through the gates as merchandise any longer, since shipments of goods are now regularly stopped and checked. No longer able to free the slaves in that manner, Mikaro began hiding his charges in an abandoned villa in a particularly rundown part of the town. Although they are safe for the moment, their numbers have grown unmanageable, and the priest fears it is only a matter of time before someone slips up and brings slavers to their doorstep. Ever more desperate to find a new means of escape from Highport, Mikaro has started work on a plan that is both daring and dangerous. He intends to use a series of old sewers coupled with natural caverns running beneath the town as an escape route to the sea beyond the walls. But he needs someone to clear out the creatures and pitfalls he knows lie within. Pgs. 2-27

For ages untold, a gemstone monolith has pierced the heart of the Echo Wood. Now, as civilization intrudes upon this enigmatic splinter, a strange life once again stirs in the depths—one with ties to undying evils and a might beyond time itself. The promise of wealth and power calls to glory-seekers from across the Inner Sea region, tempting them into a labyrinth of monster-haunted vaults, defiled tombs, arcane laboratories, and worse, as they seek to unveil the secrets locked below the legendary Emerald Spire.

a baron recruits the party to find a set of magical swords as well as explore a mine shaft that connects to the under dark

His name has inspired fear in legions of heroes, and his cult has lurked in the dismal reaches of the world for countless ages. His minions are savage and feral, his worshipers vile and wretched. He is Demogorgon, and his temples are nightmare realms haunted by primeval menaces and hateful legacies from a time when the world was savage. And now, a vengeful death knight has discovered one of these lost temples—will the PCs aid him in his dark quest for revenge, or will they fall before the awakened host of the Prince of Demons? Pgs. 64-83

Buried in fire, but hardly dead. Only the Keep survived the destruction of Koralgesh, but few adventurers will survive the terrors that now stalk the lost Keep's halls. Players hear rumours of the Keep at Koralgesh and then traverse it to acquire the treasure within. Pgs. 45-64

For the past several days, dozens of strong earthquakes have rocked the coastal area surrounding the underground Temple of Poseidon. Since the first quake, there have been a growing number of reports of strange events and macabre occurrences throughout the area. Several families near the temple have abandoned their farms and refused to return. They claim to have been terrorized by inhuman specters who prowled about their farms late at night. One of the farmers says he found a farm animal crucified and eviscerated in a ritualistic fashion on his front porch. Following the first tremors, all communications with the Temple of Poseidon, seemingly the center of the troubled area, were cut off. Messengers dispatched to the temple to request guidance from the Holy Oracle located there have not returned. Now the darkness has spread to this town. Unnatural births have occurred. Strange cries can be heard in the night, and there is a cowl around the moon. Magical divining has proven useless in naming the dark forces that invade. Many of the townspeople have already abandoned their homes and those who remain have but one recourse left: They have sent out a cry for hardened adventurers, experienced in dispatching evil. They must travel to the temple to discover the fate of the men there, and, if possible, elicit their help in destroying the growing heinous power. Pgs. 31-46

When Fort Iron was taken from the duergar who inhabited it, much of their subterranean quarters were never fully explored. An ancient oubliette has been discovered and its contents have disturbed the miners. Can the mine and the miners be saved from the dangers of the Oubliette of Fort Iron?

An introductory adventure for AD&D. Discover the secret fortress! See if your character can survive the Trail by Fire! Use your own characters, or use the fully equipped characters that are provided. Also contains maps of the fortress and a detailed wandering monster table. Exploration into an underground military base, now occupied by monsters.

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 bubbling stream cascades into a hole in the earth, leading to a series of underground watercourses and scintillating grottoes. Adventurers who delve within may discover odd mosses and fungi, a ruined temple complex, and the lair of a crystal-eating dream dragon.