The artist who created this spectacular poster is Chaosium staff artist Ossi Hiekkala. His work for Chaosium includes the covers for the RuneQuest Starter Set, RuneQuest: Weapons and Equipment, and the forthcoming Lords of the Middle Sea.
You can also see Ossi's art inside Basic Roleplaying: Universal Game Engine , and titles in the new Cults of RuneQuest series including Cults of RuneQuest: The Earth Goddesses, Cults of RuneQuest: The Lightbringers, and most recently, Cults of RuneQuest: Mythology.
Ossi currently has a slate of art commissions underway for RuneQuest, Call of Cthulhu, Pendragon, BasicRoleplaying, and Lords of the Middle Sea that will appear in coming Chaosium releases.
The Graveyards of Arkham Official Movie Poster will be available to purchase in general release in the lead-up to the launch of the Graveyards of Arkham Call of Cthulhu actual play series in 2024. In the meantime, do check out the ENNIES-nominated previous series Bookshops of Arkham, if you haven't already!