Fatal Frame II: Crimson Butterfly (零 〜紅い蝶〜 Zero ~Akai Chō~?, lit. "Zero ~Crimson Butterfly~"), known in Europe as Project Zero II: Crimson Butterfly, is a Japanese survival horror video game developed and originally published by Tecmo in 2003 for the PlayStation 2. It is the second installment in the Fatal Frame series, although not a direct sequel to the first title, Fatal Frame. The story follows twin sisters Mio and Mayu as they explore an abandoned village and experience encounters with the paranormal. Players must use the Camera Obscura to defeat ghosts and uncover the secrets of the village.
Upon release, Crimson Butterfly received positive reviews, and is widely considered to be among the scariest video games ever created. An Xbox port, subtitled Director's Cut, was released in 2004 and included additional features. The game has also been re-released on the PlayStation 3 via PSN in 2013, and a remake of the game titled Project Zero 2: Wii Edition was released for the Wii in 2012 in Europe and Japan.