Advanced V.G.is an updated version of the first game which adds new playable characters, a storyline featuring Yuka Takeuchi as the main character (who has a clone), and includes a pair of "True" bosses, the genetically engineered "Hybrid" warriors K-1 and K-2. The TurboGrafx-CD version was also released in the United States in September 1994 and was the only game in the series released in America. This game would later be re-released on the Sega Saturn and PlayStation with updated graphics and sound. The only major difference between the two versions is that the Saturn version retains the "Graphic Mode" setting which allows the viewing of the hentai scenes. This option was omitted from the PlayStation version.