A Golden Milestone in Cosmic Horror: Chaosium Unveils the ‘Call of Cthulhu: 50th Anniversary Slipcase Set’

If you’ve been waiting for the stars to come right before upgrading your Call of Cthulhu collection, that time has finally arrived.

Chaosium, the legendary publisher behind some of the tabletop industry’s most enduring titles, has officially unveiled the Call of Cthulhu: Chaosium 50th Anniversary Slipcase Set. While the Call of Cthulhu game itself was born in 1981, this stunning new release celebrates the 50th anniversary of Chaosium itself (founded by Greg Stafford in 1975).

Whether you are a veteran Keeper or a newly awakened Investigator, here is everything you need to know about this premium collector’s release.

A Tribute to 50 Years of Chaos

This set is more than just a reprint; it is a visual reimagining of the core 7th Edition books. To mark their golden jubilee, Chaosium has eschewed the standard artwork for a distinct, evocative aesthetic provided by acclaimed Swedish artist Ola Larsson.

Fans of the international Call of Cthulhu scene may recognize Larsson’s work from the Swedish edition of the game (Kall av Cthulhu). His art is renowned for its atmospheric, painterly quality that captures the brooding dread of the Mythos without relying on typical pulp action tropes. The new covers feature a unified design that looks as good on a display shelf as it does on the gaming table.

What’s Inside the Slipcase?

The set bundles the three essential pillars of the 7th Edition experience, all housed in a premium commemorative slipcase:

• The Keeper Rulebook: The tome of arcane lore containing all core rules, background, spells, monsters, and guidance for running the game.

• The Investigator Handbook: The essential guide for players, featuring expanded rules for character creation, over 100 occupations, and setting details for the classic 1920s era.

• The Keeper Screen Pack: A vital tool for the GM, this includes a 3-panel screen featuring Larsson’s panoramic art facing the players, along with ready-to-play scenarios, reference tables, and maps of Lovecraft Country and Arkham.

Note on Rules: It is important to clarify that this set uses the current 7th Edition ruleset. If you already own the standard 7th Edition slipcase, the mechanics inside are identical. This release is a cosmetic upgrade intended for collectors and those celebrating the publisher’s history.

Release Date and Pricing

According to the official announcement, preorders are open now through Chaosium’s website.

• Price: $139.99 USD

• Shipping: Expected to ship to customers in Early 2026.

As is tradition with Chaosium direct orders, purchasing the physical slipcase set typically includes the PDF versions immediately, allowing you to start reading (or admiring the art) while you wait for the physical books to arrive.

Why This Matters

Surviving 50 years in the tabletop RPG industry is no small feat. Chaosium has weathered changes in the market, ownership, and trends, remaining a titan of the industry. This slipcase serves as a victory lap for the company that popularized the d100 Basic Roleplaying system and proved that RPGs could be about investigative horror and impending doom, not just power fantasies and loot.

Are you planning to pick up this anniversary set, or are you sticking with your battle-scarred standard editions? Let us know in the comments below!