Digital Devil Story: Megami Tensei[a] refers to two distinct role-playing video games based on a trilogy of science fantasy novels by Japanese author Aya Nishitani. One version was developed by Atlus and published by Namco in 1987 for the Famicom—Atlus would go on to create further games in the Megami Tensei franchise. A separate version for personal computers was co-developed by Atlus and Telenet Japan and published by Telenet Japan during the same year. (wikipedia.org)