Combat helps characters level up, but physical violence is not always the best course of action. Battles present players with an isometric viewpoint of the action, while the dungeon-crawling aspect of the game switches to the first-person perspective. Gamers need to manage and improve all of these skills, as the SEBEC Corporation's newest invention seems to be inviting a constant stream of demons from another dimension. These phantasm-like personae serve the role typically assigned to mages or wizards, unleashing a variety of different magic attacks on enemies, while the main characters can use traditional melee weapons for close-quarters combat or modern guns for ranged attacks.
While playing a children's folklore game, the teenage characters are struck unconscious and greeted by a man named Philemon, who imbues within them the ability to summon different personalities known as personas.