Sadly, the OST and theme songs for Kamen Rider Kuuga and Kamen Rider Agito are not part of this recent update as their soundtracks weren't published by Avex, the company that releases the official theme songs and OSTs of the Kamen Rider Series since Kamen Rider Ryuki. That also includes the compilation album featuring the main Heisei Kamen Rider themes. The closest fans can hear the theme songs of Kamen Rider Kuuga and Kamen Rider Agito is with RIDER CHIPS' cover of said songs.