Atlus USA today announced that Knights in the Nightmare for the PSP has shipped to stores nationwide and is available for download from the PlayStation Store.

Somewhere between heaven and the underworld-in the center of a quiet lake-stood an ancient castle known as Aventheim. Without warning, denizens of the netherworld emerged and slaughtered the kingdom; nary a soul was left alive.

Within an abandoned, long-forgotten church deep in the woods, the Wisp is set free. Bereft of memory, it is drawn toward the monster-infested castle and re-awakens the souls of the vanquished knights, leading them back towards the fallen stronghold to confront the very forces of evil that took their lives.