The Nintendo Competitor crossword solution is Sega, a four-letter word. Sega is a Japanese multinational video game developer and publisher headquartered in Tokyo. It is known for its arcade, home video game consoles, and video game franchises such as Sonic the Hedgehog, Total War, and Yakuza. Sega has been a major competitor to Nintendo since the 1980s, when it released its first home video game console, the Sega Master System.