John Madden Football (Genesis, 1990) - Sega Does
The Rise Of The Madden Football Phenomenon
List of Nintendo Entertainment System games - Wikipedia
How did John Madden become one of the biggest names in video game history?
John Madden Football (1990 video game) - Alchetron, the free social encyclopedia
History of video games - Wikipedia
John Madden Football '92 (Video Game 1991) - IMDb
List of Madden titles, Madden Wiki
How the Madden NFL videogame was developed – GranneBlog