Cytus is a rhythm game series developed by Rayark, a Taiwanese indie game studio. The first installation, Cytus, was released in January 2012 as a mobile game, and ported to PlayStation Vita and Mobile as Cytus: Lambda, in June 2013. A planned arcade version, Cytus: Omega, was announced in 2015 as co-developed with Capcom, and ultimately cancelled in 2018. The sequel, Cytus II, was released in 2018, and a remake for Nintendo Switch was released in April 2019 as Cytus Alpha.