Mad Rat Dead was designed by Yu Mizokami, creator of the 2015
survival horror game
Yomawari: Night Alone, and its sequels. According to her, the project was conceived before the release of
Yomawari, but was shelved for a while.
Nippon Ichi Software first revealed the game in June 2020 with October 29, 2020 release date. Participating composers were also announced, alongside the first images of the upcoming title. The worldwide release through
NIS America was confirmed later that day, with plans to publish the game on October 30, 2020 in North America and Europe, and on November 6, 2020 in Oceania.
Music The game's soundtrack was composed and performed by several artists: a_hisa, Dyes Iwasaki,
Camellia, ZIZZ STUDIO (You Ooyama, Kouichi Sakita / xaki, Yoshihiro Kawagoe), and Nippon Ichi Software's sound director Kazuya Takasu. The soundtrack is included on CD with the Japanese special edition of the game, while the Western special edition featured the soundtrack in digital format, as well as on a cassette tape. The soundtracks Volume One and Two were released on the "Nippon1.jpショップ" (Shop) site as stand alone soundtracks; a 3-CD set and 1-CD set, respectively. ==Reception==