Mystery Case Files: Fate's Carnival is an adventure-puzzle casual game developed by Big Fish Studios and distributed by Big Fish Games. It is the tenth installment in the Mystery Case Files series and was released on November 26, 2013.

The player returns to the carnival grounds which were the setting of Mystery Case Files: Madame Fate, an earlier game in the series, in order to help Madame Fate's spirit, and to assist various of the carnival workers who have been imprisoned or trapped.