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.

A little cave-borne adventure about harvesting valuable cysts from a sleeping creature, trying not to be killed by the horribly mutated infectious things that already tried that, and helping a wizard who recently lost all his friends and just wants to get his spellbook back. For use with your fantasy RPG of choice. How would I use this thing? -As a terrible one-shot without consequences! -Drop "Find the wizard Felix Longworm cowering by stones and a mournful tree" into your mountainous random encounter table of choice, and pull this out when the fates decide. -If the cave is ignored something else will eventually be birthed out of it, so you get free campaign fodder if your players shake their heads and say "nope". Apart from the adventure it also contains a glorious suit of cursed armour, horrific explosives, four new spells, an adorable cut-out map for your players to put together as they explore, and some pretty neat light tracking mechanics, so there's that.

Prison of the Hated Pretender is an introductory adventure for 4-6 characters levels 0-1. Originally published on the Dungeon of Signs blog, it is a short drop-in location-based adventure with a couple of interesting puzzles, a lack of "book" monsters, implacable foes with an obvious weakness, and a very weird roleplaying opportunity. The new 2020 edition republished by Hydra Collective adds suggested guidance for new Dungeonmasters who grew up with 5th edition and don't know how old-school works. Stats for both BECMI and 5th edition, and setting neutral (though there are some implied things about the history of the world).

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).

Part megadungeon, part underground expedition, Operation Unfathomable serves as both a one-shot adventure and a campaign framework. PCs are (optionally) drafted at swordpoint to recover the Nul Rod, a priceless artifact that was recently lost in a local prince's foolhardy attempt to destroy the Chaos Gods of the Underworld. The PCs have been drafted as an expendable set of pawns to venture into the vast and bewildering Underworld and retrieve the Nul Rod. With the Underworld's innumerable beasties being on high alert after the prince's expedition, the PCs must sneak through the incredibly dangerous Underworld. Fighting is not as important as stealth, fast-talking, and running away rapidly. This is the expansion from Sholtis's original Operation Unfathomable, released in Knockspell #5 (2011).

In "The Brazen Bull," whilst traversing one of the seedier neighbourhoods of Khromarium, your party are solicited by a greasy-haired Pict. He offers to sell you a sheaf of magical lotus that allows one to see the future or to brew potions that empower the imbiber with sorcery. He beckons you to follow Jeffrhim into a dilapidated building ...

In Claine Forest near Padduck Village there has appeared a pit. No-one knows where it came from, it just did. It is not so deep that you cannot see the bottom, but people fear it and avoid it. No-one who has climbed into it has come back, having been dragged beneath the surface by unseen hands. A necromancer has come to the forest, seeking the pit. She does not quite know what she expects from it, but what she hopes for is protection from death. Player-characters may wish to get involved, and thus this constitutes an adventure for old-school systems, for 5-6 PCs of 2nd level 2 or slightly fewer of 3rd. The PCs won’t necessarily all die, and the players will almost certainly survive. Reviews elsewhere: "It pours out flavour in nearly every word, creating delicious situations for the party to interact with. ... We got a village, two rival groups of adventurers, a weird-ass forest, and somewhere in the forest a pit, your final destination. From this, joy is made. Each one of those elements has their component parts well done and, because of this the whole is a wonder." — Bryce Lynch of tenfootpole

It's like a 'Legend of Zelda' puzzle dungeon, but instead of Link, you play as a group of grubby grave robbers. Also, there's way more eyeball stuff. Puzzle Dungeon: The Seers Sanctum is a system neutral adventure for characters of level 1 to 4. It will work with any old school games like Old School Essentials or B/X or the most recent version of the world's most popular roleplaying game. What's in it: * 10 room dungeon crawl where each location has its own mysteries to poke and experiment with * Cohesive puzzles that build on each other * Lets players to discover their own solutions in true OSR fashion * Magic items and equipment that change how the players interact with their environment and previously explored areas * Use as a 4-6 hour one-shot or the start to a planar hopping campaign for wherever you'd like to go

Come visit the acid fantasy mini-sandbox of the Misty Isles, a hellish pocket plane that's brutally displaced a bucolic paradise. Marvel at its massive grub-ridges, shake at the body horror of its protein vats—and watch as your players dynamically unleash the Anti-Chaos Index through their own in-game actions. Misty Isles of the Eld is a stand-alone sequel to Slumbering Ursine Dunes and Fever-Dreaming Marlinko. It contains: Four dungeons. The Vat Complex (with its menacing sealed off-west wing, body-horrific industrial process and pocket dimensions), the flying god-prison Monument Five, the meth-fruit Plantation House and Colonel Zogg's Pagoda Bunker. Full “extra-planar” pointcrawl. The wilderness crawl spreads over one main isle and two smaller islets subdivided by massive, movable grubs. An “Anti-Chaos Index.” Through their actions the players shape the very reality of the Isles. Sometimes for the better, sometimes for the worst, but always for the weird. A slew of new otherwordly monsters. A large collection of bizarre technological Eldish artifacts and treasure. Includes a random generator for miscellaneous artifacts picked up. A new psionicist player class, the Psychonaut, with a soft scifi twist. Including its own powers and mutations.

An adventure in Hyperborea designed for from four to six characters of 6th through 8th level In the far reaches of Hyperborea’s Crab Archipelago lies a small, mountainous island known as Crystal Point. Passing sailors recently have witnessed a crimson glow in Crystal Point’s waters and beams of russet light shining up from its steep cliffs. Too, unusually frequent lightning storms in the area have torn the sky in blinding flashes, shattering the air with their awesome sound. The seedy wharf taverns of Khromarium and elsewhere buzz with these strange tales—some even speculate that Crystal Point may hold the lost treasure of Atlantis! The Lost Treasure of Atlantis takes players into an action-packed realm of adventure: the mythical world of Hyperborea, a sword-and-sorcery campaign setting inspired by the fantastic fiction of Robert E. Howard, H.P. Lovecraft, Clark Ashton Smith, and others. This adventure is designed for Astonishing Swordsmen & Sorcerers of Hyperborea™ (AS&SH™), a role-playing game descended from the original 1974 fantasy wargame and miniatures campaign rules as conceived by E. Gary Gygax and Dave Arneson. Therefore, AS&SH is compatible with most traditional fantasy role-playing games (c. 1974 to 1999) and their modern simulacra, such as OSRIC™ and Swords & Wizardry™.

An adventure in Hyperborea designed for from four to six characters of 7th through 9th level Your party finds itself in the employ of Ragnarr the Sea-Wolf, a jarl of New Vinland and a reaver of old. His daughter, a shield-maiden named Gunnhildr, has been abducted by a brute called Björn Blackbeard. During a desperate search, the Sea-Wolf crossed sails with a former rival, and from the blood-flecked lips of a dying foe, he learnt the location of Blackbeard’s stronghold. Now, deep in the misty fjords of Brigand’s Bay, where cutthroats, pirates, and freebooters thrive, you have been charged with liberating the Sea-Wolf’s daughter. The Sea-Wolf's Daughter takes players into an action-packed realm of adventure: the mythical world of Hyperborea, a sword-and-sorcery campaign setting inspired by the fantastic fiction of Robert E. Howard, H.P. Lovecraft, Clark Ashton Smith, and others. This adventure is designed for Astonishing Swordsmen & Sorcerers of Hyperborea™ (AS&SH™), a role-playing game descended from the original 1974 fantasy wargame and miniatures campaign rules as conceived by E. Gary Gygax and Dave Arneson. Therefore, AS&SH is compatible with most traditional fantasy role-playing games (c. 1974 to 1999) and their modern simulacra, such as OSRIC™ and Swords & Wizardry™.

With the rising of the Blood Moon, the accursed abode of the Blood King returns to this world. The lord of all vampires comes to claim the blood that is owed to him. His halls contain treasures and secrets that would make any ambitious adventurer abandon reason and caution to seek them out. Will you risk your soul for gold and glory in the Halls of the Blood King?

Fresh-faced and more than a little hung-over our newly graduated mage of the great Dunromin College of Magic and his friends step into the tea-room next to the Porter’s Lodge and ask for something for a headache. Within minutes they find themselves accosted by the smiling figure of Malcolm Darkstar, Bursar of the College and owner of the tea-rooms, keen to ask them a favour… This is an introductory level set of scenarios designed to take a starting-level party on their first exciting adventures; The Lost Son; The Return of the Cauldron of Millent and the Murder at the Red Barn

The Drunderry River runs narrow and fast through much of its course, before tumbling into the lowlands beneath the Fallow Hills, in the shadows of the Blacktooth Ridge. From there, the river spreads out across fertile plains, laboring slowly to the south before emptying into the Elmarsh Lake. Until recently this area was unsettled, but a writ of the King's has brought many people to the area. The village of Malforten, nesteld along the banks fo the Drunderry River, near the Fallow Hills, is just such a place. A quiet village with simple people, they learned the hard way the Blacktooth Ridge casts a deep and dark shadow. Seeing rich prizes in cattle and grain, people and other movables, Gritznak the Gnoll has come down from the Blacktooth with loot on his mind. All they've done to drive him off have failed, at their wits end the villagers turn to others, more experienced in combatting evil. They look to a rising knight to save them . . . . Also available for 5E: https://www.drivethrurpg.com/product/160855/A0-The-Rising-Knight--Adventures-for-5th-Edition-Rules

Hurry! Hurry! Hurry! Step right up, ladies and gentlemen, and behold the greatest circus in the land! Behold the skilled mummers performing at The Stage; you’ll literally feel like you’re part of the play! Thrill to the death-defying acts (and audience) in the two rings under the Big Top! Laugh at the antics of the baleful buffoons, harmful harlequins, and malevolent merrymakers of Clown Alley! Gaze in wonder at the wild beasts of the Menagerie, (just make sure you know which side of the bars you’re on)! All this and more, for the small price of a single admission, to Bitterbark’s Magnificent Circus! The circus is in town! But there’s something not quite right about it. There are rumors of missing children, evil plots, and more. Can you discover the secrets hidden inside Bitterbark’s Magnificent Circus? Intended as a stand-alone adventure, but there are notes on how to include it as part of the Castle of the Mad Archmage mega-dungeon adventure. Published by BRW Games

Weeds trail the water. The sandbar just off the shore shifts. A reptile rumble, a splash. Now a gaping maw. A roar. Claws splintering wood. The boat capsizes. You are in the river, now. He is the Bachelor: a pale crocodile, as long as five men lying end to end. He swallows hunters, families, trading skiffs. Prospectors fear to go out. Witches mutter. They say he causes landslips. They say he is a god, a curse -- an old, old sin, staining the river. They say he has been killed, before. He is pulling you under. Lorn Song of the Bachelor is a 48-page riverine adventure and dungeon crawl module, inspired by the crocodile stories of Southeast Asia -- particularly Sarawak. It features: Tragedy, a bloody curse, and a love gone very sour Open-ended factional interplay between local villagers, a foreign merchant Company, and a giant supernatural crocodile -- and its motivating spirits Multiple random tables, including: magical fabrics woven by god-possessed craftspersons; trinkets of a now-fallen Monkey Empire; medicinal herbs and animals 19 new creatures, including: mind-controlling catfish; golems made of teeth; a pregnant tiger spirit Wilderness travel up an enchanted river An extraplanar dungeon complex that can change the surrounding environment A morally complex treatment of colonialism, within the framework of an adventure module A giant crocodile who really wants to eat you

“Rats in the Walls”: A dockside tavern in Khromarium is plagued by rats of a most unusual breed. These abominable rodents have ruined the tavern keeper’s business and his life. The man is desperate, and he offers a substantial reward for the elimination of his horrific problem.

A collection of five one-shot adventures for Cairn! Imperial Vault 19 A grieving widow in the forest begs you to save her baby. A hedge witch has taken the infant down into an old imperial vault where she uses the child’s Chaos tears in alchemical potions. And who knows what old treasures might still be hidden in the vault? Unless it’s not that kind of vault… Barrow of the Blood Baron Face off against vampire bats, vampire thralls, and a vampire noble, as well as a few other creatures that have clawed their way into this once-armored vault. Discover works of art, exotic wines, enchanted clothing, and filthy weapons. Negotiate with the guards and intruders alike, using clever words or whatever stake-like objects are close at hand! Tomb of the Tin Templar Encounter electric jellyfish, tinker gnomes, and the rusted corpse of the noble Sir Tristan, as well as a few other creatures that have drifted into this marvelous mechanical vault. Discover windup toys, clockwork companions, and baffling devices. Negotiate with the guards and intruders alike, using clever words or whatever rusty objects are close at hand! Priory of the Primate Priest Defy root trolls, monkey monks, and a beguiling dryad, as well as a few other creatures that have found their way into this marvelous living vault. Discover magical armor, haunted skulls, and the bonest of the apes' victims. Negotiate with the guards and intruders alike, using clever words or whatever living objects are close at hand! Fane of the Fey Fellmonger Match wits with guild goblins, pixies, and a living skin suit, as well as a few other creatures that have spirited their way into this disturbing leathery vault. Discover arcane clothing, deadly sewing tools, and a fey lord who isn't entire dead yet. Negotiate with the guards and intruders alike, using clever words or whatever sewing objects are close at hand! New PC Background: The Dungeoneer! In addition to some unusual delving gear, select one of 10 unfortunate results of a recent delve-gone-wrong, as well as one of 13 helpful boons or tools from a recent delve-gone-right.

The Dreaming Caldera involves the players infiltrating a volcano teeming with monsters that are intent on constructing a chaos god. The players must navigate through the hostile environment, disrupt the monstrous activities, and ultimately prevent a catastrophic event. 27 keyed locations Written for the Old-School Essentials (OSE) rule system

This morning, the forces of Law and Chaos clashed at Castle Yennagor. The battle raged all day, but as darkness fell, a cataclysmic explosion destroyed most of the castle and leveled both armies. Now, as night claims the vale, flickers of life return. Survivors make camp, flee the field, or continue the fight. Scavengers creep over the dead. And one question remains unanswered: what happened inside the castle? This is a dark sandbox adventure. Players take the role of battlefield survivors. They can choose which side they are on (or neither), and they can choose their goal, such as to escape the field with their lives, to plunder the dead, or to reach the castle and finish the mission. ADVENTURE TYPE: Mid Level / Combat / Diplomancy / Battlefield / War / Dark Fantasy / Factions DESIGN NOTES This adventure is intended for mid-level characters around Level 6-7 Players navigate a battlefield full of competing factions and gruesome situations 30 unique encounter locations 70+ original magic items 30+ original monsters One map and multiple illustrations Estimated play time: 1-4 sessions (4-16 hours)