The Sega Mark III is a third-generation video game console released by Sega in Japan in 1985 as the successor to the SG-1000 and SG-1000 II. Designed... The Sega Mark III is a third-generation video game console released by Sega in Japan in 1985 as the successor to the SG-1000 and SG-1000 II. Designed as a competitor to the Nintendo Famicom, the Mark III featured improved hardware, including enhanced graphics and sound capabilities. It introduced support for both cartridges and Sega's proprietary My Card format. The console later became the basis for the Sega Master System, which was marketed globally. Known for its sleek design and compatibility with a wide range of games, the Sega Mark III laid the groundwork for Sega's later success in the console market. Expand