The product is an expansion for Arkham Horror: The Card Game. There is no option to play separately with only the add-on, the main game is required.
Where the Gods Dwell is the fifth Mythos Pack in the Dream-Eaters cycle in Arkham Horror: The Card Game. After a seemingly endless journey through the Dreamlands, you've finally arrived at Leng, the ice wasteland where you believe the summit of the unknown Kadath lies. However, you feel something whispering inside you, something haunting you, a silent voice that cannot be heard but can be felt at the edge of your mind.
Where the Gods Dwell is scenario 4-A in The Dream-Quest campaign. The scenario can be played alone in Standalone Mode or as part of a wider 4 or 8 part campaign. After the Dark Side of the Moon, you've finally arrived in Kadath, where Nyarlathotep awaits a battle that could change the fate of the world. If you outwit him, you might win, but how do you win against an enemy you don't understand?