A Conspiracy of Doors is a Dungeons & Dragons adventure for five player characters of 11th level. It can serve as an introduction to Sigil, the City of Doors, as well as a group of adventurers' first taste of action at the paragon tier.

The Raiders’ Hideout is a series of underground chambers (or perhaps the interior of a pyramid) that serves as a base of operations for a band of gnoll desert raiders. The PCs have come to exact a measure of justice for recent brutal caravan raids. They’ve tracked the gnolls to their lair, where they intend to end the threat to desert trade once and for all. Pgs. 30-35

As the story goes, worshipers of Bahamut and worshipers of Gruumsh spent years warring. As the dead piled up, a Bahamut faithful crafted a weapon of devastating power. Most of the inventor’s peers balked at its use, but some felt it was justified. Those few who used the weapon were twisted into mad, dark beings by its corrupting power. The rest of Bahamut’s flock locked them and the weapon away in a dungeon prison. The dungeon and its terrible secret were long forgotten—until a group of rakshasas happened across the ancient tale. Now they seek the weapon for their own designs. Pgs. 132-137

A slaver gang known as the Bloodreavers are terrorizing the countryside from their base deep in the labyrinth under Thunderspire Mountain. But these slavers are only the symptom of a larger threat in the bowels of Thunderspire.

You will take up the mantle of heroism in a grim world where simple survival cannot be taken for granted. These heroes will shape the world of Athas while they grow in power and prestige - or die trying. Your character has been asked to aid a secretive faction of the Veiled Alliance in the Free City of Tyr against an unknown assailant. Ashes of Athas is a 4e D&D campaign set in the world of the Dark Sun campaign setting.

Rising from the surface of a massive lake, an ancient ziggurat travels through time for purposes unknown. It’s up to the characters to enter this strange relic and discover what dark threat the structure poses. The Ziggurat Beyond Time contains advice for customizing the adventure for your own campaign. It also contains an artifact, the Deluvian Hourglass, that has time-related properties and wishes to witness the end of the world. Pgs. 23-55

The adventurers have delved into the Abyss to strike at the Demon Lord of Undeath, Orcus. On the layer of Thanatos, the Blood Lord has many outposts from which he spreads his corruption. One of his primary lieutenants is Doresain, the Ghoul King. If the PCs kill Doresain in his lair, they will strike a real blow against the foul demon lord. Pgs. 174-179

Long ago, before the arrival of civilized humanoids, a large colony of ogres thrived in the local area. When a great invasion from another dimension threatened this colony, their king, Koptila, prayed for his people to be spared. The gods heard these pleas, but commanded Koptila to sacrifice himself. The leader did so, and the clan disappeared—whisked away by the gods and lost to time. Over the years, a city grew up above the former subterranean home of the ogres, and no aspect of Koptila’s ancient bargain was preserved or remembered. Even so, the stars are aligned for the return of Koptila and his people. These powerful repatriates are unlikely to appreciate the changes in their old home. A sage has found dusty documents prophesying this return, and he asks the PCs to investigate the catacombs to defeat the potential threat to the city. The PCs travel down through city sewers and subterranean passages before finding the catacombs that the ogre colony once called home. Pgs. 48-53

A half-marilith, half-medusa druidess lich known as the Hate Blossom lairs in this dungeon, having been run out of mortal society and shunned by demonkind. She possesses the petrified-yet-still-living body of Melenkir, the first human arch-mage and the single creature to remember a ritual that may save the realm from an extraplanar threat. Only slaying Hate Blossom or convincing her to lift the curse will revive Melenkir. Published by Defy Danger and Save Verses Death

None know from where the Heresiarch first came, but all remember the night that it did. It rode down from the bleeding stars on a great serpent, hurling bolts of obsidian lightning that shattered the monuments and capitols of every nation. Its infernal army swept aside the defenses of the mortal empires in a single hour, decimating legions once thought to be the invincible fist of humanity's god-kings. Faceless priests - each bearing the symbol of the trident - drifted through the fallen cities and scorched villages on a frigid wind, and when they rose to greet the huddled men and women ringed by their festering, bloated dead, they spoke a single, simple offer: worship the Heresiarch or die. Thousands of crusaders fell tonight so that you might be given this chance. In a last stand that, for the first time, united all of the empires of humanity as brothers and sisters, a way was cleared into an infernal stronghold said to contain a gate to the Heresiarch’s fane. All is silent save for the clangor of distant battle. Surrounded by grim-faced knights and teary-eyed peasants – their hands clasped in desperate hope – you step through the glowing, churning doorway, knowing there will be no help and likely no return. Published by Defy Danger and Save Versus Death

In the aftermath of AD&D Second Edition's "Return to the Tomb of Horrors," the demilich Acererak was thought destroyed. In truth, his spirit lingered and now after eons he schemes once more to achieve divinity. The characters must travel to three extraplanar dungeons, in addition to the remains of the original Tomb, in order to stop this from coming to pass.

E2, following up on Death's Reach, the PC's first travel to Sigil following the smuggled remains of the primordial Timesus. The pursuit then leads into the Abyss, through the White Kingdom to face Doresain, the Ghoul King, exarch of Orcus. The module certainly is epic, placing the PCs up against powerful monsters like greater demons, death knights, and a demilich. It may be frustrating that the PCs arrive too late to disrupt the plot (have to allow for the finale in the next adventure) but taking out Orcus' right hand ghoul may be satisfying. Includes a skill challenge for crossing a portion of the Abyss For environments, City refers to Sigil.

What begins as a simple expedition to settle a new village in the ruins of the mysterious Castle Inverness sets off a chain of events that could threaten every living being from Winterhaven to Hammerfast. Not everyone in the Nentir Vale is happy to see civilization brought to Inverness, particularly the ghost of Salazar Vladistone, who commands the spectral legion called the Phantom Brigade. "March of the Phantom Brigade" is an adventure designed for season 4 of the Dungeons & Dragons Encounters official play program. It includes the information the Dungeon Master needs to run the adventure, thirteen ready-to-play encounters (each intended for one session of play), and full-color foldout battle maps depicting the various encounter locations.

The goddess Erathis has never seemed the sort to demand the sacrifice of mortals in exchange for safe trade routes, but that’s exactly what her high priest has demanded. When a local ruler asks the characters to investigate the high priest, a chain of events is set in motion that could shake the city of Wyllea, and the church of Erathis, to its core. This adventure makes extensive use of roleplaying encounters and skill challenges, with fewer tactical combat encounters. There is a substantial focus on politics and intrigue. The Tariff of Relkingham is written for 3rd level PCs, but contains advice for lowering or raising the starting level from 2-4. It also contains a system for calculating an advantage or disadvantage in the final fight based on the players' actions during the adventure. Pgs. 83-103

At the behest of Orcus, Demon Prince of Undeath, a mighty deathpriest hierophant has begun assembling a powerful strike force. He intends to launch the first of many assaults on the world, readying it for his master’s arrival. With the help of potent allies and grand rituals, the PCs have discovered a route to the Abyssal headquarters of this hierophant. This delve begins as the PCs teleport from the world to the first of a complex of interconnected chambers deep in the Abyss, linked only by portals. Pgs. 126-131

Jelendra, a tulani of summer, has gathered a small following of dark fey creatures to help her get revenge against the Highridge Arcane eladrin elders. When they had the nerve to question her interest (they called it “obsession”) in the destructive power of the Wild Hunt, Jelendra flew into a rage and stormed out of the Highridge Arcane. Now, she controls a fane to an ancient spirit of the Wild Hunt. Not knowing what became of her, the elders ask the adventurers to find Jelendra. “Let her know that she is missed, and we want her to return home,” one elder says. Pgs. 114-119

The necromancer Tal Lorvas has unearthed an underground tomb that dates back to the height of the ancient tiefling empire. Lorvas has been terrorizing the surrounding lands with his vile experiments, and now he hopes to find a ring, hidden in the tomb, that is tied to a ritual he wants to perform by the rise of the next full moon. The PCs must enter the tomb of Empress Nemeia, deal with the servants of the necromancer, and confront Tal Lorvas before he can claim the ancient relic and move one step closer to ultimate power over the undead. Pgs. 36-41

While camping in the wilderness, the characters find a tracker surrounded by wolves. Once the heroes dispatch the beasts, the tracker reveals that she is seeking aid in the fight against the darkness enfolding her community, Silver Lake. Should the characters help, they find the village terrorized by lycanthropes that hail from a tiny island rising from the mist-shrouded lake.The island is a fey crossing, and heroes who set foot on it find themselves in the Feywild, where a war is brewing; the lycanthrope clans are at each other’s throats, and many are turning their feral eyes outward to the rich lands beyond their secluded valley. To avert an unimaginably savage war, the heroes must rescue a werewolf lord from his captors and expose the conspiracy that threatens to drench the Feywild in blood...

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.

The Raven Queen’s servants often seek out mighty allies. One of these is the black dragon Quetzallus, who resides in a deep cavern on the Shadowfell guarding a stream of souls flowing into the Raven Queen’s realm. But a death knight named Raxikarthus, betrayed by the Raven Queen in life, now seeks to enslave this dragon for his own purposes. He madly believes that he can stand against the Raven Queen, and seeks allies of all stripes—even her own servants—to do so. The death knight has found a pathway into the Shadowfell thought closed by mortals. Beneath a decayed keep, the undead dragonborn has reopened this portal and led his forces into the Shadowfell itself. The PCs are called in to beard the death knight in his lair. They find it abandoned, but discover a strange passage in the lower reaches. Pgs. 162-167