"Revelations: Persona, released in Japan as Megami Ibunroku Persona (女神異聞録ペルソナ, Megami Ibunroku Perusona, lit. "Alternate Tale of the Goddess: Persona"), is the first game in the Shin Megami Tensei: Persona series of role-playing video games for PlayStation consoles—one of several spin-off series within the Megami Tensei franchise, developed by Atlus. The game was originally released on the PlayStation in Japan and North America; the Japanese version was later ported to Microsoft Windows. Set in contemporary Japan, Revelations: Persona stars a group of high-schoolers who, armed with weapons and imbued with magical beings known as Personas, band together to combat demons that are invading their city.
A remake of the game, titled Shin Megami Tensei: Persona and known in Japan as simply Persona (ペルソナ, Perusona), was released for the PlayStation Portable in 2009. It was released Japan on 29 April 2009 and in North American on September 22, 2009 on UMD and October 1, 2009 on the PlayStation Store as a downloadable title. The remake includes a redesigned user interface, new cutscenes, multiple difficulty levels, and an arranged soundtrack."
Source: Wikipedia, "Revelations:_Persona," available under the CC-BY-SA License.