Audio
Yggdra Union has an extensive soundtrack, totaling nearly sixty tracks co-composed by Shigeki Hayashi and Minako Adachi. This near-half division of effort left Shigeki Hayashi mostly with character themes and promotional music, and Minako Adachi with the story, map and menu music. The soundtrack is an entirely original composition, except for the song Heaven's Gate (ヘヴンズゲート, hevunzugeto?), which is explained to be a bell-heavy arrangement of the Riviera song Heaven's Gate (ヘヴンズゲート, hevunzugeto?). Aside from the music, the audio in the GBA version of Yggdra Union is fairly standard, with sound effects in battle and beeping for text of a pitch based on the character speaking. There is no voice acting in the GBA version, but, despite that fact, one of the many fan demands since even before its release is a Drama CD.
A third of Yggdra Union's soundtrack is dominated by Shigeki Hayashi-composed character themes, which are important in the presentation of the battles. When a clash starts, the attacker's theme song is the background music used for the entirety of the clash, and, when a player-controlled character is the attacker, the pacing of the music is dictated by the mode; in Aggressive, the music will speed up, in Passive the music will slow down, and when Neutral the music will play normally.
The first official compilation of the Yggdra Union soundtrack was the Yggdra Union Perfect Audio Collection Plus, released a month after the GBA version's Japanese release. The collection is made up of two discs, the original BGM containing songs directly from the GBA version of the game, and the image BGM containing instrumented versions of the songs. The compilation also contains six bonus songs, one being a collage of the battle themes and appearing at the end of the original BGM, and the other five being arrangements of various tracks, placed at the end of the image BGM. In the soundtrack insert is a large amount of artwork, as well as notes from Shinichi Ito, Minako Adachi and Shigeki Hayashi on the soundtrack itself, and notes on each song's instrumentation, design and implementation.
Upon the release of the "Sting the BEST" version of the game, however, another soundtrack was produced in Japan, compiling the new orchestrations of the PSP battle themes along with the "image BGM" versions of Adachi's tracks, which were used in the PSP version of the game.
The PSP version added full voice acting, with notable talents including Mai Nakahara as Yggdra, Miyuki Sawashiro (みゆき) as Milanor, Yui Sakakibara as Kylier, Atsushi Kisaichi as Durant, Ai Maeda as Nietzsche, Akemi Satō as Rosary, Ai Nonaka as Emilia and Mariko Suzuki as Zilva.
Read more about this topic: Yggdra Union: We'll Never Fight Alone