The Idolmaster Cinderella Girls: Starlight Stage (Japanese: アイドルマスター シンデレラガールズ スターライトステージ, Hepburn: Aidorumasutā Shinderera Gāruzu Sutāraito Sutēji) is a Japanese free-to-play collectible card and rhythm video game in The Idolmaster series co-developed by Cygames and published by Bandai Namco Entertainment.

Unlike the simulation format of the original Cinderella Girls, Starlight Stage features a rhythmic gameplay in which the player times the presses of buttons to the rhythm of the songs and a predetermined pattern displayed on the screen.

Each idol also has four statistics points: vocal, dance, visual—which are tallied together as her total appeal value—and life, which represents her health value, and a skill that influence gameplay.

[6] Scoring is also affected by each idol's skill, which provides different gameplay benefits and are activated automatically at random.

[8] At the end of each song, a result screen is displayed to player, and his or her performance is rated with a letter grade, a numerical score, and a percentage that represents his or her accuracy.

The player is awarded an amount of in-game money for his or her performance, while each idol also receive a number of fans and affection points.

[8] Starlight Stage was primarily developed by Cygames with Shirō Ogata of Bandai Namco Entertainment serving as its producer.

[10] To ensure that the game is playable at 60 FPS on low-spec devices, the team also created a lightweight, 3D setting with reduced effects and 2D modes.

[11] Artist team manager Yūma Tanimoto noted that because the game's appeal lies in its 3D stage performances, the team placed significant importance on faithfully recreating the Cinderella Girls idols in 3D with specifications such as polygon count and texture resolution matching those of PlayStation 3 games.

[12] To assist with the creation of the game's stage performances, the development staff created a custom timeline editor for Unity named Cygames Unity Timeline Tool to adjust variables such as the idols' expressions, lip sync, and camera angles.

The development team had wanted to include a different set of choreography for each idol during a stage performance, but the idea was abandoned because of the necessary amount of data and extra workload.

Instead, all five members perform the same dance sequence with time offsets intentionally introduced to make them appear less mechanical.

[15] To promote the game's release, Bandai Namco produced and aired multiple television commercials featuring Masahiro Nakai of SMAP.

[16][17] Starlight Stage reached 4 million downloads in the Android version's first week of release in Japan.

[19] "HiFi Days" was awarded a Gold disc by the Recording Industry Association of Japan in June 2016 for shipping 100,000 copies.

[24] Likewise, Hara praised the game's choreography, and noted that it was hard for him to keep himself from shifting his attention to the idols' dancing during gameplay.