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.
Echoes of the Past is the first expansion in the Path to Carcosa cycle for Arkham Horror: The Card Game.
In the Path to Carcosa cycle, you continue your research in the Arkham Historical Society, trying to uncover secrets unknown even to the members of the society while barely maintaining your sanity.
It's going to be hard not to go crazy as Echoes of the Past brings you the appearance of the Yellow King, which will draw you into a web of otherworldly forces.
