In 1983, a company called Service Games had the crazy idea of making a home console that was oddly similar hardware-wise to the MSX and ColecoVision.
The SG-1000, also known as the Sega 1000 in New Zealand, was Sega's first ever home console. It launched the same day as the SC-3000 computer on July 15, 1983 with software being compatible between the two. Sega would release a redesigned home console in 1984 as the SG-1000 II.
Unfortunately, because it was the remnants of a failed deal between Coleco and Nintendo, it also launched the same day as another, more capable system by Nintendo, more or less sealing the SG-1000's fate from the start. It also didn't help that Sega was less open to third-party publishing at the time, though the system still managed to perform decently. It would later be followed up by the Mark III, which later released overseas (and in Japan) as the Master System.