The Master System is an 8-bit third-generation home video game console manufactured and developed by Sega. It was originally a remodeled export version of the Sega Mark III, the third iteration of the SG-1000 series of consoles, which was released in Japan in 1985 with graphical capabilities improved over its predecessors. The Master System launched in North America in 1986, followed by Europe in 1987, and then in Brazil and Korea in 1989. A Japanese version of the Master System was also launched in 1987, which features a few enhancements over the export models : a built-in FM audio chip, a rapid-fire switch, and a dedicated port for the 3D glasses. The Master System II, a cheaper model, was released in 1990 in North America, Australasia and Europe.

In the history of video games, the third generation of video game consoles, commonly referred to as the 8-bit era, began on July 15, 1983, with the Japanese release of two systems: Nintendo's Family Computer and Sega's SG-1000. When the Famicom was released outside of Japan, it was remodeled and marketed as the Nintendo Entertainment System (NES). This generation marked the end of the video game crash of 1983, and a shift in the dominance of home video game manufacturers from the United States to Japan. Handheld consoles were not a major part of this generation; the Game & Watch line from Nintendo and the Milton Bradley Microvision that were sold at the time are both considered part of the previous generation due to hardware typical of the second generation.