Innsmouth and Arkham Reach New Call of Cthulhu VTT Platforms

Two settings, two platform conversions

The announcement groups Innsmouth and Arkham as titles in Chaosium’s Arkham Unveiled series for Call of Cthulhu. Innsmouth is the Roll20 release; Arkham is the Foundry VTT release. Chaosium also says Arkham was already available on Roll20, so the Foundry announcement adds another platform version rather than introducing the setting itself.

These are setting supplements and VTT implementations, not a new core game. A group deciding which version to explore should start with two practical questions: which setting suits the campaign, and which platform the group actually uses. A VTT conversion is less useful if the group does not play on that platform, regardless of the amount of included material.

What Chaosium lists for Innsmouth on Roll20

Chaosium says the Roll20 version integrates maps, handouts, artwork and character sheets. It also describes GM-layer information and dynamic-lighting support, with Plus or Pro required for those features. That subscription condition is part of the publisher’s dated description; check Roll20’s current product and account information before planning around it.

The announcement separately lists an Innsmouth Compendium, an addon and a token pack. The compendium description mentions rules for creating investigators and playing in Arkham, more than 100 NPCs and more than 100 locations, along with new items and tomes. The addon is described as including over 70 pages of scenes, more than 20 maps, references, handouts, art and rollable tables; the token pack is listed as containing 200-plus tokens.

Those are features of the Roll20 Innsmouth listing as presented in the announcement. Before buying, check the current platform listing for exactly what is included, how the components are packaged and whether subscription requirements affect the functions your group wants. The source does not explain upgrade terms for owners of other editions.

Arkham on Foundry and the Canvas Interface

For Arkham, Chaosium describes a Foundry version with maps, handouts, art and character sheets integrated for the VTT. It also says material can be revealed and investigated through point-and-click with the Chaosium Canvas Interface. This is the platform-specific feature emphasized in the announcement; it should not be read as a promise that every element of play is automated.

Chaosium’s description presents Arkham as a sandbox setting, listing 290 locations across nine neighborhoods, along with gossip and rumors as scenario seeds and more than 80 detailed NPCs. The post also describes 25-plus maps, GM-layer information and tables for names, gossip, locations and weather in the Arkham Addon. These details speak to setting and preparation content, while the Canvas description concerns the Foundry presentation.

For a Keeper weighing a purchase, decide whether the group wants a city sandbox with reusable leads or a focused coastal-town setting. Then check the Foundry listing and module requirements directly. The announcement does not provide a complete compatibility guide or a cross-platform ownership policy.

A careful pre-session checklist

Before committing campaign prep to either conversion, confirm the platform version, current price and account requirements in the relevant marketplace. Then decide which materials you intend to use: maps and handouts for a prepared scenario, or the broader location and NPC information for a sandbox. This helps separate a setting purchase from the practical question of how much of its content your group will actually use.

The source post is dated September 11, 2026, and its headline says the titles were available on virtual tabletops. That is dated publisher evidence, not an independent verification of listings on October 6. The product names and feature descriptions above follow Chaosium’s platform-specific announcement; current availability, pricing and ownership terms should be checked with the relevant publisher or platform.