The game was previously dated for PlayStation 4 and PC on August 27 in North America and September 19 in Japan.
Here is a brief overview of the game, via Spike Chunsoft:
Crystar is an ARPG developed by FuRyu Corporation. Rei fights her way through the afterworld of Purgatory to rescue Mirai, the little sister that she killed. To resurrect her, Rei makes a deal with Demons to combat Revenants and Specters—the tormented Souls of the dead. Crystar’s unique game mechanics allow the player to harness the power of grief. Use Rei’s tears to craft weapons and armor as well as summon a Guardian to protect her in battle. Rei’s weeping gives her the strength to fight as she searches for her sister’s lost Soul.