Level up your investigations with Chaosium Core

Get access to all the core rule books for Call of Cthulhu 7th edition and enjoy continuous updates to our Chaosium Library. Over $150 value for only $5/month.

Chaosium Core

In this Chaosium subscription you’ll find unbridled access to Call of Cthulhu’s core books and Assistant knowledge to guide you through the intricate rules and rich lore of Call of Cthulhu.

Access in Library: *

  • Investigator Handbook
  • Keeper Rulebook
  • Malleus Monstrorum Vol 1 & 2
  • Grand Grimoire of Cthulhu Mythos Magic
  • Cults of Cthulhu

Quest Portal Assistant: *

  • Library Link (Requires Quest Portal Pro)
Call of CthuluChaosium


Call of Cthulhu titles are available in the Quest Portal Library.PDFs or physical copies not included.
Library Link requires Quest Portal Pro.


The Library ensures that you'll never be left in the dark on your quest for enlightenment. By subscribing to this arcane treasure trove of knowledge, you'll gain instant access to the most crucial texts from Chaosium's extensive collection, making your gaming experience more immersive, engaging, and terrifying than ever before.*

Library Link

Embark on a thrilling journey into the dark and mysterious world of H.P. Lovecraft with Library Link in the Quest Portal Assistant, your all-knowing Call of Cthulhu companion. Delve deep into the secrets of the 1920s and unlock the wisdom of the ages as the Assistant brings you the combined knowledge of 5 essential Call of Cthulhu tomes, all at your fingertips.**

Keeper Rulebook

Keeper Rulebook

Investigator Handbook

Investigator Handbook

The Grand Grimoire of Cthulhu Mythos Magic

The Grand Grimoire of Cthulhu Mythos Magic

Malleus Monstrorum I: Monsters of the Mythos

Malleus Monstrorum I: Monsters of the Mythos

Malleus Monstrorum II: Deities of the Mythos

Malleus Monstrorum II: Deities of the Mythos

Quest Portal Pro

Get more out of your Chaosium Core subscription

Be prepared for anything your players choose to do. Be able to respond without a break. Upgrade to pro to unlock your very own Game Master assistant.

Call of Cthulu

Quest Portal Assistant

Quickly draft ideas, encounters, backstories and place descriptions.

Call of Cthulu

Library Link

Ask about rules and lore of supported games with our Library Link.

Call of Cthulu

Avatar Generation

Generate unique avatars for your character sheets and tokens.

Frequency Asked Questions

  • Quest Portal is a simple yet powerful virtual tabletop (VTT) for playing TTRPGs on desktop and mobile devices.

    Game Masters can set up campaigns with ready-made scenes and maps that come with ambient music that can be revealed from the Fog of War, create character sheets as NPC or make them available to players to claim.

  • Subscriptions auto-renew at the end of each monthly billing period. As a new user, you'll receive a 7-day free trial to explore the game and its features.

    However, if you've already claimed a free trial before, you won't be eligible for another one.

  • In case of billing issues, such as a declined or expired card, we provide a 3-day grace period that allows you to resolve the issue without losing access to your subscription.

    If you have any other issues with your subscription, please contact us.

  • We are a passionate team of 13 nerds and two dogs.

    We design and code Quest Portal in downtown Reykjavík, Iceland. Head over to questportal.com/about to read more about our party.

  • No - you can use the Free plan for as long as you want.

    We aim to make TTRPGs more accessible, so a generous free plan will always be available.

  • If you decide to cancel your subscription, it will be effective at the end of your current billing cycle. You'll still have access to everything until that date, but after that, you won't be charged, and your access will be revoked. To cancel, go to the platform where you initiated your subscription:

    Web: https://questportal.com/bill

    Apple App Store: https://apps.apple.com/account/subscriptions

    Google Play Store: https://play.google.com/store/account/subscriptions

  • No - players can use Quest Portal for free for as long as they want.

  • No - we don’t offer subscription sharing at this time.

    We might rethink that strategy, let us know if you really like to see that.

  • Elder has served its purpose as a phenomenal prototype for the Quest Portal Assistant.

    We couldn’t turn off its servers, so we’re storing Elder under a glacier in Antarctica.

Join the adventure

Quickly create a campaign, invite you friends and start playing right away with hundreds of scenes, maps and sounds at your fingertips.

Produced under license from Chaosium Inc. (chaosium.com) 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.