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The 100-Room Citadel: A Replayable 5e Megadungeon for 2-3 Players
Paperback
Series: The Ready Adventure, Book 80
Please select the version of book you would like to purchase.
ISBN13: 9798193415442
Publisher: Independently Published
Published: Aug 18 2026
Pages: 328
Weight: 0.88
Height: 0.82 Width: 6.00 Depth: 9.00
Language: English
Publisher: Independently Published
Published: Aug 18 2026
Pages: 328
Weight: 0.88
Height: 0.82 Width: 6.00 Depth: 9.00
Language: English
The castle rebuilds itself every night. One hundred rooms deep, no two delves run the same - and something at the center keeps redrawing the map to keep you in. The Cartographer-King mapped everything he ever conquered, and when he died the map would not let him go. Now his citadel shuffles its own rooms like a deck of cards, and only a small band of intruders can cut a path to the throne at its heart. This is a complete, replayable 5e megadungeon built for a small group - one hundred rooms, five zones, and a different route to the throne every single time you play. Here is what makes it replayable: at the start of each zone your party rolls to see which room opens next, so the dungeon reshuffles every session and the same book runs a hundred different ways. Clear four rooms to unlock the zone's warden; beat the warden to claim its seal; collect all four seals to face the Cartographer-King. The path is never the same twice, but the climb always builds. Five Zones, One Rising Threat:
Fight up through the Overgrown Approach, where the outer keep has gone to briar and root; the Sunken Catacombs, where the dead still keep the King's old order; the Elemental Vaults, where fire, ice, and storm are locked behind failing seals; the Clockwork Works, a hall of hand-wrought brass that winds itself back together; and the Living Towers, where the citadel finally stops pretending to be a building. Each zone has its own warden, its own treasure vault, and its own map that never draws the same way twice. What's Inside:
Most megadungeons assume a full party of four to six. This one is tuned from the ground up for two or three players at low levels - every fight is survivable, no attack drops a full-health hero in a single blow, and a guaranteed gear track keeps a duo or trio in the fight all the way to the throne. Big-dungeon scope, small-table math. No Prep, All Table:
Every room is written to run straight off the page - read-aloud text, tactics in plain language, and a treasure chart you roll on the spot. There is nothing to build before your session and nothing to look up mid-fight. Drop it onto any fifth-edition table and go. Perfect For:
- Small groups of two or three who want a full dungeon crawl scaled to their table
- Game Masters who want a campaign-length adventure with no prep and near-endless replay
- Duos and trios hunting a fifth-edition-compatible megadungeon they can return to for months
- A milestone centerpiece for a shelf - a big, self-contained castle in one book Everything you need to run a complete, replayable dungeon is between these covers. Open the gate, roll the dice, and find out which castle you get tonight.
- 100 fully keyed rooms across 5 themed zones, each with its own warden boss and reward vault
- A dice-driven room engine that reshuffles the dungeon every session, so the adventure is genuinely replayable for months
- Over 100 top-down battle maps - one for every room, plus a full-citadel reference map
- 36 original creatures with complete stat blocks - plus zone variants - grouped in the order your party meets them and tuned so nothing one-shots a hero
- The Warden's Vault - a keys-and-chests treasure economy that rewards a party for exploring every single room
- A four-warden seal chain that builds to the Cartographer-King, with two possible endings your table chooses for itself
- 4 ready-to-play characters with full sheets and portraits, a balanced trio-plus-one covering the front line, healing, locks, and firepower, so you can sit down and start tonight with zero prep
- Roughly 260 pages, built for 2-3 players at levels 2-3, about five sessions of play with no leveling to track
Most megadungeons assume a full party of four to six. This one is tuned from the ground up for two or three players at low levels - every fight is survivable, no attack drops a full-health hero in a single blow, and a guaranteed gear track keeps a duo or trio in the fight all the way to the throne. Big-dungeon scope, small-table math. No Prep, All Table:
Every room is written to run straight off the page - read-aloud text, tactics in plain language, and a treasure chart you roll on the spot. There is nothing to build before your session and nothing to look up mid-fight. Drop it onto any fifth-edition table and go. Perfect For:
- Small groups of two or three who want a full dungeon crawl scaled to their table
- Game Masters who want a campaign-length adventure with no prep and near-endless replay
- Duos and trios hunting a fifth-edition-compatible megadungeon they can return to for months
- A milestone centerpiece for a shelf - a big, self-contained castle in one book Everything you need to run a complete, replayable dungeon is between these covers. Open the gate, roll the dice, and find out which castle you get tonight.
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