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.
There are many worlds in our reality, but there is one hidden among them: the world of dreams, fantasy and nightmares. After author Virgil Gray's description of his adventures in this world, you set out to find out if it is real or just another fiction of the writer.
The Dream-Eaters is the fifth Deluxe expansion for Arkham Horror: The Card Game. It includes two new scenarios, several new investigator decks, cards for old investigator decks, and more.