The Idolmaster Cinderella Girls is a Japanese free-to-play simulation video game co-developed by Cygames and Bandai Namco Studios for the Mobage social network platform for mobile phones. It was first released on November 28, 2011, for feature phones, and compatibility was extended to iOS and Android devices on December 16, 2011. The game is based on The Idolmaster franchise, and features a cast of new idol characters. In September 2015, a music video game developed by Cygames titled The Idolmaster Cinderella Girls: Starlight Stage was released on the Google Play Store and Apple Store in Japan. The original game ended service on March 30, 2023, and was succeeded by its spinoff game and adaptations.

The Idolmaster is a Japanese media franchise that began in 2005 with a raising simulation and rhythm video game series created by Bandai Namco Entertainment. The series primarily centers on the career of a producer who works with a group of prospective pop idols at the talent agency 765 Production. Originally released as an arcade game, the franchise has grown to numerous ports, sequels and spin-offs across multiple video game consoles, including several social network games. The series includes a variety of other media such as an anime with the same name, printed media, audio dramas, a Korean drama, and radio shows.