Chaos;Child is a visual novel video game developed by 5pb. It is the fourth main entry in the Science Adventure series, and a thematic sequel to Chaos;Head (2008). It was released in Japan in 2014 for Xbox One, and later for PlayStation 3, PlayStation 4, PlayStation Vita, Microsoft Windows, iOS, and Android. The PlayStation 4 and PlayStation Vita versions were released by PQube in Europe and North America in 2017, and the Windows version by Spike Chunsoft in 2019. Other media based on the game has been released, including an anime television series, two manga, an audio drama, and the sequel game Chaos;Child Love Chu Chu!! (2017).