The NieR series of games has a seriously hardcore fanbase, and from my own experiences of playing the original title on PS3 (I remember picking it up at a bargain price in a car boot sale near Pontins, natch) I can see where the love comes from, as the characters are memorable, and the story is sweeping, majestic and grand – terms that can also be levelled at the music.
Whilst the original versions feature full orchestration, here TPR and Roxane Genot strip the sound back to primarily piano and cello, re-arranging the tracks to give a closer, more intimate feel.