First expansion for Within Walls a paranoia driven hidden traitor game with social deduction elements set in the early 20th century horror setting. The "Infiltration" is the story response by the "Agency" to gather information while obstructed by the "Cult" The expansion features: new Profession cards new Insanity cards new Interactions mode for up to 8 players The game is played in the same setting as the original since the goal of the game is playing the interaction between players instead of with the board. —description from the publisher