Based on the dark mythos of master horror writer H.P. Lovecraft, the Secrets of Arkham expansion features a new 10-card story deck designed to take your experience with Call of Cthulhu: The Card Game down new paths of cosmic horror. This story deck provides an alternative to the story deck provided by the Call of Cthulhu: The Card Game Core Set.

This 110-card expansion also contains two copies of 50 different cards, featuring iconic mythos figures like Azathoth, Professor Armitage, and the Necronomicon, as well as introducing new cards and resurrecting old favorites from the archives for all seven Factions and neutral cards.