The production team took numerous pictures from many abandoned towns on rural Japan for inspiration for the games scenes. This included pictures oh Japan's Special Forces for a character involved in the games plot.
Released in Asian countries (Japan, South Korea, Taiwan,...) and PAL areas (Europe, Australia,...). Not released in North America.
In April 2007, the "Siren 2 Maniacs" guide book was released . This book is an official explanation of the plot of the game and contains a lot of interesting things: detailed information about all the characters and monsters, a chronology of events, an analysis of the meaning of all the archive files, interviews with the developers, concept art, details about the process of creating the game, the manga "Memories of the Mermaids", and a short story "Mystery of the Bright Win". In general, 250 pages of pure happiness for true fans. This book was published only in Japan and only in the Japanese language.