Actually, the game is not based on the anime. The Black Rock Shooter franchise originated from illustrations of emo Hatsune Miku by Ryohei Fuke and has multiple interpretations and incarnation of the characters. The anime follows a completely different story than the game, so does the manga.
Anyway.
- Magna Carta: Tears of Blood
It is not a JRPG but a KRPG. Wouldn't recommend to anyone but the most die hard fan of the genre, as it is incredibly tedious, has some really weird gameplay mechanics and the story is garbage. That said, Hyung-tae Kim was the character/world designer and you definitely see it. The game looks gorgeous. Hyung-tae's studio Shift Up's newest game Stellar Blade was nominated during this year's Game Awards, but his older games never garnerd much attention.