Curse of the Dark Pharaoh
Curse of the Dark Pharaoh is the first expansion for Arkham Horror. It was released in June 2006. One of the smaller expansions, it incorporates new cards, card types, and game mechanics, but does not include a new gameboard.
Curse of the Dark Pharaoh includes the new card types of Exhibit items (which function as a special category of Unique item), Benefits, and Detriments; and allows for investigators to be barred from a neighborhood.