The crossword solution for the term SEGA COMPETITOR is Atari, which is a 5 letter word. Atari was founded in 1972 and was one of the first companies to produce video game consoles. It was a major competitor to SEGA during the 1980s and 1990s, when the two companies were in direct competition with each other. Atari was eventually overtaken by SEGA in the console market, but it still remains a popular brand in the gaming industry.