Megami Tensei

"Megami Tensei (女神転生, Goddess Metempsychosis), commonly abbreviated as MegaTen, is a Japanese console role-playing game metaseries which was originally based on the novel series Digital Devil Story by Aya Nishitani (taking its name from the title of the first of those novels) and has gone to become one of the major franchises of the genre in its native country. The games are published by Atlus with the exception of the Famicom games, which were published by Namco.

Although most games in the series have independent stories, the Megami Tensei series has many common elements. Demons and mythology are prominent in each installment, usually giving players a chance to recruit demons into the battle party. Other elements include game mechanics and plot themes.

Megami Tensei games have met commercial and critical success and the series is usually known as the third main RPG series in Japan, after Dragon Quest and Final Fantasy. Several games from the series have been released in North America and found praise from critics."

Source: Wikipedia, "Megami_Tensei", available under the CC-BY-SA License.