Expansions are boxed sets of rules and game pieces that build upon the original game of Arkham Horror. Some expansions add new rules to change the game mechanics. Some expansions include additional investigators for players to play, additional Ancient Ones for players to struggle against, new monsters, or other types of rules.
Details for each expansion can be found on their listed page.
List of expansions
|Curse of the Dark Pharaoh||2006|
|The King in Yellow||2007|
|The Black Goat of the Woods||2008|
|The Lurker at the Threshold||2010|
|The Curse of the Dark Pharaoh (Revised Edition)||2011|