アイディアファクトリー
For each title in the Re;Birth series, the soundtracks were re-released following each game's initial release, usually with a few additional or missing tracks. Re;Birth 2's soundtrack, titled "Hyperdimension Neptunia Re;Birth2: SISTERS GENERATION ~ "Sisters' Melodies" Soundtrack CD" was released exclusively on Idea Factory International's website with the Limited Edition of the game and contained 19 tracks from the game. Compile Heart and Idea Factory International later made the Re;Birth series available for the PC on the Steam platform, in which DLC included digital releases of the soundtrack for each game.