Cult of the Rat Lord

A Chaos Uncovered Saga Adventure for Roll20

Something beneath the City is waking.

The Chaos Uncovered Saga is a connected series of three urban-fantasy adventures written for the newest edition of Cypher:

1. The Hands of Chaos
2. The Eyes of Raja
3. Cult of the Rat Lord

Each adventure can be played independently or linked together to create an escalating campaign of urban mystery, faction conflict, and creeping horror. What begins as a kidnapping in a crowded marketplace gradually reveals rival organizations, forbidden relics, hidden cults, and something ancient stirring beneath the streets of the City With No Name.

Cult of the Rat Lord is a companion adventure of the saga, picking up in the direct aftermath of The Hands of Chaos.

Descend Beneath the City

The threat beneath the City can no longer be ignored.

Rat-Kin warrens are splintering, disappearing, or being forcibly drawn together under a new power. Violent cult cells move through forgotten tunnels and abandoned districts. Ancient and technomantic relics are being unearthed, altered, and used without any understanding of what they might awaken.

Strange pulses ripple through the undercity. People disappear. The dead refuse to remain quiet. Entire neighborhoods begin to feel subtly wrong.

The characters must descend through desecrated graveyards, corrupted warrens, hidden laboratories, and secret cult sanctums to uncover what is happening beneath the streets. By the time they understand the cult’s true purpose, they are no longer investigating an isolated threat or trying to prevent another crime.

They are racing to stop an awakening already in motion.

Designed for narrative play, investigation, exploration, and mounting supernatural horror, Cult of the Rat Lord brings the choices and consequences of the Chaos Uncovered Saga together for a final struggle beneath the City.

The cult has prepared for this moment. The question is whether the characters are already too late.

More Than an Adventure

In addition to the complete adventure, Cult of the Rat Lord introduces new game content that can be incorporated into this campaign or used in other Cypher System games, including:

• New cyphers and technomantic relics shaped by the strange forces spreading beneath the City
• New creatures and adversaries, including Rat-Kin, cultists, undead horrors, and beings warped by unstable reality
• New NPCs with distinct abilities, motives, loyalties, and connections to the cult’s growing influence
• New supernatural and environmental threats for undercity exploration
• Graveyards, warrens, cult sanctums, hidden laboratories, encounters, and complications that can be adapted for other campaigns

Built for Roll20

This Roll20 edition is fully organized and ready for virtual play. It includes:

• The complete adventure, arranged for easy navigation
• Prebuilt NPC, creature, and adversary stat blocks
• Prepared encounters
• Scene-ready maps with custom tokens
• GM notes placed where they are needed
• Player handouts and clues ready to share
• Structured acts and scenes for smooth session flow
• Dynamic Lighting support
• New cyphers, relics, creatures, and supernatural threats prepared for use during play

Everything has been organized so the GM can focus on the investigation, the descent beneath the City, and the growing consequences of the characters’ choices instead of spending hours preparing the virtual tabletop.

Roll20 Addon

Cult of the Rat Lord is provided as a Roll20 Addon. This allows you to add the adventure’s maps, handouts, characters, tokens, and other prepared content directly to a new or existing Roll20 game.

The Addon can be installed into games using either the Legacy or Jumpgate tabletop, allowing you to conclude the Chaos Uncovered Saga in the same game used for The Hands of Chaos and The Eyes of Raja or incorporate the adventure into an established campaign.

Add the complete adventure to your preferred game, gather your players, and descend into the shifting darkness beneath the City.

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License: Roll20 End User License Agreement
(Personal Use Only, Do Not Distribute)