Ciel Nosurge, full name Surge Concerto: Ciel nosurge (Japanese: シェルノサージュ〜失われた星へ捧ぐ詩〜, Hepburn: Sherunosāju 〜 Ushinawareta Hoshi e Sasagu Uta 〜), with the title translating to "World of the Girl -Requiem to a Lost Star-" is a life simulation[2] video game for the PlayStation Vita developed by Gust.

[5][6] In September 2015, Koei Tecmo announced that all versions of the game would remain exclusive available to Japan, with the company having no intentions on translating or releasing it in any other regions or languages.

A remastered version, Ciel Nosurge DX, was released on March 4, 2021, in Japan for Nintendo Switch, PlayStation 4 and Microsoft Windows.

At the time of its release, many of the game's online servers were not working properly, but that problem has since been fixed by Gust through a series of patches.

Other than episodes and patches, other minor add-ons have been released on PSN, such as costumes, extra scenarios and dialogue packs for the interactions with Ion.

The world of Ciel Nosurge was designed with an intent to give Japanese players a sense of nostalgia; for example with buildings from the Shōwa era.

It was originally scheduled to release on January 28, 2021 in Japan for Nintendo Switch, PlayStation 4 and Microsoft Windows,[16] but was later delayed to March 4, 2021.