Megami Tensei, marketed internationally as Shin Megami Tensei, is a Japanese media franchise created by Aya Nishitani, Kouji "Cozy" Okada, Ginichiro Suzuki, and Kazunari Suzuki. Primarily developed and published by Atlus, and currently owned by Atlus, the franchise consists of multiple subseries and covers multiple role-playing genres including tactical role-playing, action role-playing, and massively multiplayer online role-playing. The first two titles in the series were published by Namco, but have been almost always published by Atlus in Japan and North America since the release of Shin Megami Tensei. For Europe, Atlus publishes the games through third-party companies.

Atlus Co., Ltd. is a Japanese video game developer, publisher, arcade manufacturer and distribution company based in Tokyo. A subsidiary of Sega, the company is known for video game series such as Megami Tensei, Persona, Etrian Odyssey, and Trauma Center, as well as Print Club (Purikura) arcade machines. Its corporate mascot is Jack Frost, a snowman-like character from their Shin Megami Tensei series. Outside of video games, the company is known for their Purikura arcade machines, which are selfie photo sticker booths popular in East Asia.