- Is a game development corporation based in Taiwan.
- Has released seven games on iOS and Android platforms: Mandora, Cytus, Deemo, Implosion - Never Lose Hope (Implosion for short), VOEZ, Cytus II and Sdorica -mirage- (Sdorica -sunset-), Sdorica being their latest game. They have also published the award-winning indie platformer MO: Astray by Archpray.
- Most Rayark games are free to download on Android, but require players to purchase new chapters or full access.
- The most popular and most downloaded games are Cytus and Deemo, both of which are music-rhythm based games.