The Idolmaster Cinderella Girls is a Japanese free-to-play simulation video game developed by Cygames and Bandai Namco Entertainment 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 story in Cinderella Girls follows the career of a producer in charge of leading and training prospective pop idols to stardom. Its gameplay follows a collectible card game format in which each idol is represented as a card, which the player may use to form a unit of idols to train in lessons, take to jobs, and compete against opponents. Cinderella Girls has made transitions to other media. An anime television series adaptation produced by A-1 Pictures aired in Japan between January 10 and October 17, 2015 and was simulcast by Daisuki. Eight manga series, three sets of manga anthologies, two Internet radio talk shows featuring the series' voice actresses, image song singles and albums, and live concerts have also been produced.