The existence of a 17th version in the beatmania IIDX series was confirmed by Konami on May 25, 2009, alongside the announcement of the first public location tests at the Cat's Eye arcade in Japan, which had already been promoting the location tests set to begin on the 27th of May for several days before the official announcement.
The location tests revealed new features contained in the game, such as "charge notes", and contained a sampling of songs slated to be included on the final release. Additional tests were held in late June to early July in Nagoya and at an arcade at the Norbesa in Sapporo.
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.
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. .