Shin Megami Tensei: Persona 4, originally released in Japan as simply Persona 4, is a role-playing video game developed and published by Atlus for Sony's PlayStation 2, and chronologically the fifth installment in the Shin Megami Tensei: Persona series. Persona 4 was released in Japan in July 2008, North America in December 2008, and Europe in March 2009. It features a weather forecast system with events happening on foggy days to replace the moon phase system implemented in the previous games.