Persona Q: Shadow of the Labyrinth[a] is a role-playing video game developed by Atlus for the Nintendo 3DS. It is part of the Persona series, itself part of the larger Megami Tensei franchise. It was published across all territories in 2014: released in June in Japan, November in North America and Europe, and December in Australia. Atlus published the game in Japan and North America, while NIS America published it in the PAL region.The story of Persona Q is a crossover between Persona 3 and Persona 4, whose characters are drawn from their respective time periods by an unknown force and sent into a replica of Persona 4's Yasogami High School in another world. Meeting with Zen and Rei, two people whose memories were taken, the groups must unite and explore four labyrinths in the school to recover treasures hidden within. These treasures can restore Zen and Rei's memories which might help them find a way to escape. The gameplay fuses elements of the Persona and Etrian Odyssey series, and focuses on first-person dungeon crawling through labyrinths and combat using the characters' "Persona" abilities against hostiles known as Shadows.