Solo TTRPG play with AI
How to play Call of Cthulhu 7e solo
Call of Cthulhu's investigation-driven gameplay is a natural fit for solo play. As a lone investigator, you piece together clues, consult strange tomes, and confront horrors that would test anyone's sanity.
Overview
Call of Cthulhu's investigation-driven gameplay is a natural fit for solo play. As a lone investigator, you piece together clues, consult strange tomes, and confront horrors that would test anyone's sanity. The percentile system's transparent mechanics make it easy to resolve checks on your own, and the genre's emphasis on atmosphere over combat keeps the focus on narrative tension.
Adapting for solo play
AI tools for solo play
AI storyteller
Investigate eldritch mysteries with an AI Keeper that manages clues, red herrings, and the creeping dread of cosmic horror.
NPC chat
Interview witnesses, consult occult experts, and interrogate cultists. Each NPC has their own knowledge, secrets, and breaking point.
Rules assistant
Quick answers on skill checks, Sanity mechanics, chase rules, and combat resolution while you focus on the investigation.
Solo scenario starters
The Blackwood inheritance
A distant relative has left you a decaying estate in rural New England. The locals avoid the property, and the solicitor handling the will seems nervous. As you explore the house, you find journals describing rituals and a locked door in the basement that hums at night.
Missing at Miskatonic
A professor at Miskatonic University has vanished, and their office has been sealed by the administration. You find a note slipped under your door, written in the professor's hand, begging for help and referencing a book that should not exist.
The lighthouse signal
Fishermen along the coast report strange lights from an abandoned lighthouse. The Coast Guard found nothing, but two of their officers have since been committed to Arkham Sanitarium. You decide to investigate what the officials missed.
Solo play tips
Frequently asked questions
How does the AI manage investigation clues without spoiling the mystery?
The AI storyteller places clues across locations and NPCs based on your investigator's actions and skill rolls. It reveals information progressively, ensuring you earn each discovery. Failed rolls may yield partial clues or lead to red herrings, maintaining genuine suspense.
Can I play published Call of Cthulhu scenarios solo?
The AI storyteller creates original scenarios inspired by Lovecraftian themes. While it doesn't run published adventures directly, you can describe a scenario premise and the AI will build an investigation around it with appropriate tone and mechanics.
How does solo Sanity loss work?
The AI tracks your Sanity score and narrates psychological effects when you encounter horrors. It manages temporary and indefinite insanity, triggers phobias you've developed, and adjusts NPC reactions based on your investigator's mental state.