Nintendo is a Japanese video game company that has been around since the 1980s. It has had many rivals over the years, including Sega, Atari, and Sony. Sega is a Japanese video game company that was founded in 1960 and is known for its arcade games and home video game consoles. Atari is an American video game company that was founded in 1972 and is known for its arcade games and home video game consoles. Sony is a Japanese multinational conglomerate corporation that was founded in 1946 and is known for its PlayStation video game consoles. All three of these companies have been rivals to Nintendo throughout the years.