Checks at three difficulties
Click any characteristic, resource, skill or weapon. Regular, Hard and Extreme targets are already worked out, with up to two bonus or penalty dice.
Call of Cthulhu: Your investigator sheet, inside ChatGPT
Play Call of Cthulhu 7th Edition with a powerful investigator sheet from Quest Portal, built for ChatGPT and Codex. Track Sanity and Luck, roll for luck, fire weapons, use skills, and keep your investigator from going insane.
Start with a prompt
Copy a prompt. Paste it into ChatGPT or Codex. Follow the setup steps.
Open the dossier from your sidebar
Open the fullscreen sheet to create, edit, and switch between your investigator drafts.
Plugins
Call of Cthulhu
Chats
Everything a 7th Edition investigator needs
The Call of Cthulhu Enhanced Sheet from Quest Portal, built to run inside ChatGPT.
- Highlights
- Skills
- Combat
- Bio
- Possessions
- Spells
- Notes
Weapons and damage
Tie each weapon to a combat skill, roll the attack, then roll damage with your damage bonus already applied.
A backstory worth losing
Ideology, significant people, treasured possessions, phobias and encounters with strange entities. All ten backstory entries, plus possessions and notes.
The arithmetic is done
Half and fifth values, maximum hit points, magic points and Sanity, Build, damage bonus and Move update as you edit.
A library of investigators
Keep investigator drafts in your browser, switch between them, and import or export them as JSON.
Private to you
No Quest Portal sign-in required. Drafts stay in your browser where storage is available; export a backup before closing.
Bring your rolls into the story
Ask your agent to open the sheet or roll a check. Attach your draft when you want to discuss your investigator. Try one of these.
Harlan searches the harbourmaster's office. Roll Spot Hidden.
Call of Cthulhu rolled a check
Against Spot Hidden 65, Harlan rolled a 3. That's an Extreme success.
Ask anything
Go on, make a Spot Hidden roll
Call of Cthulhu runs on d100. Roll your skill or under to succeed. The sheet knows the rest.
- Hard needs half your skill. Extreme needs a fifth.
- A bonus die keeps the better tens die. A penalty die keeps the worse one.
- 01 is a critical. 100 always fumbles, and so does 96 or more when you needed less than 50.
Harlan's sheet
Normal roll
Pick a difficulty to roll the percentile dice.
A demo with a sample investigator.
Frequently Asked Questions
- It's a complete Call of Cthulhu 7th Edition investigator sheet from Quest Portal that runs inside ChatGPT. Open the fullscreen sheet to edit your investigator and roll percentile checks and weapon damage.
- No. The plugin is standalone. Drafts stay in browser storage where supported. If storage is unavailable, export your investigator before closing. The plugin doesn't read or change anything in Quest Portal.
- The sheet opens fullscreen from the sidebar or a conversation entrypoint. Chat rolls appear as inline result cards. Availability depends on your host and its plugin support.
- ChatGPT can open the sheet and roll checks and weapon damage when you ask. Edit and save your draft in the sheet. The Attach button shares your current draft with ChatGPT as context without sending a message.
- It's a sheet, not a creation wizard. New investigators start with neutral, editable values, and occupation points, age adjustments and skill development aren't applied automatically. Ask ChatGPT to walk you through the choices, then enter the results in your sheet.
- Half and fifth values, maximum hit points, magic points and Sanity, Build, damage bonus and Move are calculated from your characteristics. Percentile checks cover Regular, Hard and Extreme difficulty, up to two bonus or penalty dice, criticals and fumbles. Spending Luck, Sanity loss, wounds and Keeper rulings stay in your hands.
- Drafts stay in browser storage where supported and do not sync across devices. The Attach button shares the current draft with your agent as context. Export JSON to keep a backup.
- Yes. Export any investigator as a JSON file, and import one to add it to your library as a new investigator.
- Yes. The plugin is a companion sheet and doesn't include rulebook text. You'll want Chaosium's Call of Cthulhu 7th Edition rules to play.
Call of Cthulhu, Chaosium Inc., and the Chaosium logo are registered trademarks of Chaosium Inc. Chaosium Arcane Symbol (the Star Elder Sign) © 1983 Chaosium Inc. All rights reserved. ChatGPT is a trademark of OpenAI. This plugin is made by Quest Portal and is not affiliated with or endorsed by OpenAI.