Rules reference
Skills in Call of Cthulhu 7th Edition
Skills overview and how checks typically work. Call of Cthulhu 7th Edition is a horror investigation roleplaying game based on H.P. Lovecraft's Cthulhu Mythos. Players take on the roles of Investigators, ordinary people who uncover cosmic horrors beyond human comprehension. As you investigate mysteries, your character's Sanity slowly erodes, skills improve through use, and the line between reality and madness blurs.
Key points
Skills describe trained competence. Use this page to quickly understand what the skill list covers and how to pick priorities.
- Percentile skill system: Roll d100, succeed if equal to or below skill rating
- 8 Characteristics: STR, CON, POW, DEX, APP, SIZ, INT, EDU
- Occupation system: Each occupation grants skill bonuses and Credit Rating range
- Sanity mechanics: Starts at 99-POW, decreases with Mythos encounters
- Skill improvement: Mark skills during play, improve after sessions
- Derived stats: HP, Sanity, MP, Build, Damage Bonus calculated from Characteristics
If the clue matters, the Keeper can make failure cost time or safety instead of blocking progress. Use Regular/Hard/Extreme to express stakes.
Pick a few skills that match your investigator concept, then rely on teamwork and preparation for the rest.
- Mistake: Rolling without stakes. Fix: Say what success changes and what failure costs before rolling.
- Mistake: Treating failure as ‘nothing happens’. Fix: Fail forward: you still learn something, but pay a cost (time, exposure, resources, harm).