Arkham Horror: The Card Game is a cooperative tabletop game that can be played by one to four players. It is set in the world of H.P. Lovecraft's Cthulhu Mythos, and players will each assume the role of an investigator. Each investigator is unique and has their own strengths, weaknesses, and special abilities, represented by a deck of cards.

The game is structured around a series of adventures, which are individual scenarios that form a campaign. As players progress through the campaign and purchase additional expansions, they will have the opportunity to customize their investigator decks and tailor the gameplay to their personal preferences. This will help them to better prepare for the challenges that the game presents.

Echoes of the Past is the first Mythos pack in The Path to Carcosa Cycle. It is one of six small expansions that continue the investigation begun in The Path to Carcosa Deluxe expansion. This expansion features a new story in which the players must uncover the secrets behind a mysterious play called The King in Yellow, which seems to be causing chaos and madness in the town of Arkham.

In order to play this expansion, you will need a copy of Arkham Horror: The Card Game and The Dunwich Legacy Deluxe Expansion. The game is suitable for players aged 14 and up, and the playtime can vary from 30 to 90 minutes depending on the format.