They are still trapped in their cosmic prisons, but their allies here are working to free them. You and your friends must stop them and protect the world from this immeasurable evil. In Pandemic: The Cthulhu Mythos, you are investigators in the fight against the cultists who want to unleash the Great Old Ones upon the world. You travel through the worlds of Arkham and Dunwich, gather clues, and combat evil. But be careful not to succumb to madness. Pandemic: The Cthulhu Mythos translates the well-known and beloved game mechanics of Pandemic into the world of Cthulhu and adds entirely new elements.