Entertainment Software Publishing
"Grandia", which ESP released in 1997, was the first third-party Saturn title to breach 500,000 units in sales. Afterwards, ESP released titles including "Giren's Ambition" and "Baroque", later extending footholds into the Dreamcast and PlayStation 2 platforms with titles like "" and "Abarenbo Princess".
Adventure game
Due to a lack of content restrictions, some of Japan's earliest adventure games were also bishoujo games with "eroge" content. In 1982, Koei released "Night Life", the first commercial erotic computer game. It was a graphic adventure, with sexually explicit images. That same year, they released another "eroge" title, "Danchi Tsuma no Yuwaku" ("Seduction of the Condominium Wife"), which was an early adventure game with color graphics, owing to the eight-color palette of the NEC PC-8001 computer, and role-playing video game elements. It became a hit, helping Koei become a major software company. Other now-famous companies such as Enix, Square and Nihon Falcom also produced similar "eroge" in the early 1980s before they became famous for their mainstream role-playing games. In some of their early "eroge", the adult content is meaningfully integrated into a thoughtful and mature storyline, though others often used it as a flimsy excuse for pornography.