About the Call of Cthulhu 7e rules reference
Horror investigation RPG
Call of Cthulhu 7th Edition is investigative cosmic horror. Percentile rolls under skill, pushed rolls, Sanity and Luck tracked live.
Call of Cthulhu uses percentile skills: roll d100 and succeed if you roll at or under your skill. Difficulty often shifts the threshold (Regular/Hard/Extreme) and Sanity loss is a core pressure loop. The roll flow has 3 steps: Pick the relevant skill (e.g., Spot Hidden, Library Use). Roll d100 and compare to your skill rating (and difficulty threshold). Apply consequences: information gained, complications, or Sanity loss when appropriate.
This page is a quick reference for Call of Cthulhu 7th Edition rules. It links to 4 rules topics so you can look up one mechanic without reading the whole book again.
How to use this page
- Use it during play: find the topic that matches the question at the table, read the short answer, then roll or move on. The Call of Cthulhu 7th Edition dice roller sits one click away.
- Open the Call of Cthulhu 7e dice roller when a rule asks for a roll, so the result follows the same mechanic described above.
- Track what changes on your Call of Cthulhu 7e character sheet, which supports 3 creation modes, so the next session starts from the current state.
- Move to a sibling page when the question changes: quickstart, glossary, GM resources, or advancement guide. Each one is built from the same Call of Cthulhu 7e data, so terms and numbers match across pages.
- Return to the Call of Cthulhu 7th Edition guide for the full overview, including character creation and every tool for this game.
Nothing on this page replaces the published Call of Cthulhu 7th Edition rulebook. It is a working reference for the table: short summaries of the 4 rules topics listed here, plus links to the tools that act on them.