cytusCytus is a rhythm game with an impressive soundtrack developed by Rayark Games available on Android, iOS, and PS Vita.  Players tap the screen with their fingers and try to keep up with the rhythm of the music.  The style of music varies from Eastern Rock to Western J-Pop and the songs  are composed by various artists including:

3R2 feat. DJ Mashiro, 3R2, AILE, Alpha Legion, ani feat. moco, ani ft. B, ani vocal by Rin, ani, Baroque, Bro’s, Cranky, DJ Mashiro, EBICO & jioyi, ensou feat. GUMI, eyemedia, ginkiha, Haloweak, HAMO, Hero_C, Hoskey, Ice Bird, ICE, jioyi, KillerBlood, Kiryu, KIVΛ, KyuRu, LOW-PASS, M2U, MILI, naotyu- feat. maya, naotyu- feat. miyu, naotyu-, NeLiME vs Presti, NeLiME, Nocturne Moonrise, Persona, Project Grimoire, Qrabit, Rabpit, Ric, sakuzyo, Shinichi Kobayashi, SHK, Sta, suzumetune, switchworks, Tsukasa, V.K, Vospi, and Yamajet.

The game follows a story and a new chapters are only unlocked after every 100,000 new players join the game.   Ten new songs are added for every chapter that is unlocked and as this is being written there are currently 581,575 players.

Here is a summary of the story plot:

“In the distant future, the only sentient beings in the world are robots. They are the last remnant of the human spirit ,however, mankind is not dead and technology exists that is capable of transferring memories to these robots.  With limited space, new memories will gradually overwrite the old so to prevent the emotions in human memories from fading away, the robots resorted to converting the emotions to music, and storing them in a place called Cytus. The robots use these songs to experience human emotion and dream that souls exists in each of them.”