Beatmania IIDX 17: Sirius is the 17th installment in Konami's Beatmania IIDX series of music video games. The main motif of Sirius's UI is astronomy, as the game is named after Sirius, known to be the brightest star in the night sky. Sirius adds two additional note types to the game, "charge notes", or Hold-me Notes which must be held for their duration, and the "back spin scratch", a type of scratching which must be spun on one direction continuously and spun again to the opposite side at the end of the note. Selected songs contained these features on the location test build. A new "party mode" consists of a story mode where players earn "fans" based on their performances.Another new mode, "League Mode" is a course whereas each song is selected based on the grade that they chose. From D grade to S grade. Songs chosen and the score that earns will convert to League points in the end. The selected songs number is ranged from 4 to 12. Score from this mode is also available to upgrade their own standards.