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Welcome to the return of the mammoth dungeons. ... The Dungeon Under the Mountain is a massive dungeon you can locate anywhere in your campaign world. Each level contains hundreds of rooms ready to be filled with the critters of your choice and with the devious traps you prefer. ... This product...

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Level 2 is less chaotic than the first; great pillared halls and endless corridors are the main feature of this level—perhaps it was built by dwarves. A very large chamber with a big ziggurat can be found here as well as many water-filled rooms. Three staircases lead to this level from the first...

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A great underground river crosses level 3. It seems very ancient, and the dungeon blends with caverns. The remains of a lost city lie scattered through the level; forgotten temples and pyramids tower in the darkness of great caverns, hiding secrets that must not be discovered. Who are the...

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This deep level is known as The Web. It features a large, dangerous maze in the northernmost area. Southward there is a large dungeon complex that includes a great spider temple. The temple extends its legs across the dungeon and holds dangers and treasures such as no one has ever seen! Nobody...

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Far below the Web lies The Citadel of the Four. The fifth level of the Dungeon Under the Mountain features a central area divided into four sections. No one knows who the rulers of this level are, but adventurers report of strange humanoid slavers ruled by evil lords who always remain hidden....

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Just under The Citadel of the Four lies the Shaft Level. The sixth level of the Dungeon Under the Mountain layout tells its own tale. The level is divided in half—the upper half belonged to a warlike deep dwarves tribe which waged war on the dark trolls living below. The dwarves conquered and...

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The seventh level of the famed Dungeon Under the Mountain lies far below the “Shaft Level” (sixth level). It is told that this is by far the most dangerous level of them all. Among the Great City citizens, tales are whispered about a banished Demon Lord having his unconquered fortress on level 7....

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Secret staircases and dark passageways take the adventurers from the Demon Fortress at level 7 to the so-called Undercity on level 8 of The Dungeon Under the Mountain. The Undercity is populated by all kinds of dark beings: mind flayers, beholders, snake people and more. A single ruler does not...

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Just beneath the Undercity lies the famed level 9, also known as The Waterworks. A massive web of snaking waterways forms the bulk of this level, and you'll find many submerged rooms and ancient sunken temples here. Aquatic creatures of every kind haunt this level, as well as a dreaded form of...

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Level 10 is also known as the staircase level, as it features many large rooms with stone spiral staircases. These staircases are rumoured to lead into smaller (but not less dangerous) sublevels. ... Welcome to the Return of the Mammoth Dungeons. ... The Dungeon Under The Mountain is a massive...

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The Dungeon Under the Mountain: Level 10—Virtual Boxed Set is a deluxe edition of The Dungeon Under the Mountain: Level 10, containing extra material you will not find in the original product. ... This Virtual Boxed Set features: The original Dungeon Under the Mountain: Level 10 product; Eight...

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The door opens to reveal four goblins dancing around a small obsidian statue. Three of the warriors wear grim expressions but seem to dance at the direction of the fourth, an ecstatic and wide-eyed goblin chanting odd phrases and scraps of prayer. The remains of countless butchered animals and...

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You enter a vast hall, some 50 by 65 feet. The 20-foot-high vaulted ceiling is supported by 30 pillars, and is riddled with cracks. Tapestries hang in tatters from the walls, and it’s impossible to tell what was once depicted on them. Some remnants of words or aphorisms remain painted on the...

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Even as you approach this darkened chamber, you are overwhelmed by the offensively pungent odor of rotting dung. The stonework here seems different then the rest of the dungeon, strangely out of place, as does the symmetrically awkward structure of the room. Pillars line the room, spaced 5 feet...

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At the tunnel's end is an empty suit of armor posed with its arms swept toward the entrance as though welcoming you in with a bow. The corridor leads to a large room scattered with fragments of brass horns and other instruments. Only the enormous pipe organ opposite the entrance has escaped...

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As you emerge through the salt-covered door, your eyes are assaulted by a disorienting contrast of glare and shadow. Like the cramped tunnels leading here, the room inside is limned with salt deposits that cover the walls, floor, and ceiling. Scattered throughout the small chamber, a half-dozen...

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A thick stone door blocks the doorway, its surface carved with hundreds of shells and undersea plants. The stone has been smashed away around a keyhole beneath a rusty iron pull-ring. It looks as though the lock were destroyed and later repaired. ... The dungeon's brick walls give way to a tunnel...

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The door opens easily to the sound of a music box and the humming of a lullaby. The room appears to be a nursery; there is an elderly elf woman seated in a rocking chair in the north east corner. Two wooden dolls cavort about the room with toys in their hands. Another wooden doll tugs at the old...

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The arched stairwell dips slightly before it climbs upwards into what appears to be a small symmetrical chamber filled with a dull greenish glow. A distorted and crumpled humanoid shadow trickles across the room's rune-scripted walls dissipating down the dark basalt steps. The chamber itself is...

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The trapdoor lifts upward to reveal a vaulted chamber lined with ten stone sarcophagi, each carved with a humanoid figure and engraved with dust-caked runes. A ten-foot statue of a vulture-like humanoid stands in an alcove halfway down the left wall. The statue has enormous wings and talons...

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Behind the door, the passage opens into a stale, moldy-smelling narrow corridor that arches steeply downwards. Whether the passageway was hand-carved or is simply a crude nature passage is visually undecipherable as the walls, floor, and ceiling are completely overgrown with pustulate,...

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Despite the passage of untold centuries, the chamber beyond has lost little of its grandeur and awe. Tucked neatly in the chamber’s perimeter alcoves are six black marble statues of great warriors armed with swords and shields. Gold and silver necklaces hang from the necks of each statue, and an...

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The trap door opens. Dim light flickers and unearthly shadows bounce and reflect from every angle, and you re immediately assaulted by the foul stench of ancient rotting blood. A faint creak comes from the ceiling above. As your eyes quickly adjust, you realize that the walls and ceiling of the...

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You enter a large T-shaped room. Large panels of plain gray granite form the walls, floor and ceiling. In the center is a raised dais atop of which sits a massive statue of an obese three-horned, four-armed, monkey-like creature. Large gems glitter in each of its eye sockets, and its long forked...

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The great doors open smoothly outward to reveal a ten-foot-wide limestone tunnel leading deep into an expansive vault with a ceiling stretching over 25 feet above the floor. Obscene glowing skulls light the vault chamber ahead of you from steel hooks mounted on the walls. They stare covetously...


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