It’s amazing on how they were able to pull it off! Disc 1 would comprise the orchestral battle stage songs while in disc 2, the boss battle themes: heavy metal versions constructed based on the melodies of the songs in disc 1. Although Okabe mentions he was able to create music here that would perfectly portray Nier, they strayed off the mellow-ethereal genre and followed the orchestral approach of Drakengard- that, while adding the twist of modern techno and metal to keep it interesting. One would expect that the OST would totally have a NieR feel to it since since Keiichi Okabe was back to spearhead the project.
