Quintet Co., Ltd. (株式会社クインテット, Kabushiki gaisha Kuintetto) was a Japanese video game developer, founded in April 1989. The company name is derived from musical terminology, as well as five elements of game design—planning, graphics, sound, programming and producing. Quintet was most active in the 1990s, when it had a strong relationship with Enix (now incorporated into Square Enix); the company was also a member of the GD-NET group of Sega Saturn developers. Quintet has not been active since the 2000s and are likely defunct.