Visual Concepts is a video game developer based in Novato, California best known for developing Take-Two Interactive's 2K series of sports games. After the success of the series, they were acquired by Sega and became a wholly owned studio with Sega, usually termed a first-party developer. However, Sega at the time termed non-internal studios that the company either set up or purchased as "1.5 development studios" in order to differentiate them from their own internal studios.