Arkham Horror: The Card Game is a cooperative game that allows up to two players to team up and take on the role of investigators in the horror-filled world of H P Lovecraft's Cthulhu Mythos. Each investigator is represented by a unique deck of cards that reflects their specific skills, strengths, and weaknesses.

As players progress through the game, they will encounter a series of adventures that make up a campaign. These adventures challenge players to use their skills and strategize together in order to overcome the various obstacles and enemies that they encounter. Along the way, players can purchase expansions that allow them to customize their investigator decks and tailor the gameplay to their personal preferences.

In Too Deep is the first Mythos pack in The Innsmouth Conspiracy Cycle, and it is one of six small expansions that continue the investigation started in The Innsmouth Conspiracy Deluxe expansion. This expansion takes players to the mysterious town of Innsmouth, where they will encounter strange sights such as the glowing lights of the Gilman House and the abandoned Fish Street Bridge. In addition to exploring the town itself, players will also delve into the unnaturally formed coves and half-flooded tunnels that lay beyond its borders, searching for clues and unraveling the mysteries that lurk within.

Please note that this expansion requires a copy of Arkham Horror: The Card Game and The Innsmouth Conspiracy Deluxe Expansion in order to play. The game is suitable for 1-4 players and typically takes 30-90 minutes to complete, depending on the format. It is recommended for players aged 14 and up.