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".
Eroge
Eroge, also known as erotic games, have their origins in the early 1980s, when Japanese companies introduced their own brands of microcomputer to compete with those of the United States. Competing systems included the Sharp X1, Fujitsu FM-7, MSX, and NEC PC-8801. NEC was behind its competitors in terms of hardware (with only 16 colors and no sound support) and needed a way to regain control of the market. Thus came the erotic game. The first commercial erotic computer game, "Night Life", was released by Koei in 1982. It was an early graphic adventure, with sexually explicit images. That same year, Koei released another erotic title, "Danchi Tsuma no Yuwaku" ("Seduction of the Condominium Wife"), which was an early role-playing adventure game with colour graphics, owing to the eight-color palette of the NEC PC-8001 computer. It became a hit, helping Koei become a major software company.