Video game clone grouped as "Myst clones". Some video game genres are founded by archetypal games of which all subsequent similar games are considered derivatives; notably, early first-person shooters were often called ""Doom" clones", while the success of the open-world formula in "Grand Theft Auto" led to the genre of GTA clones. The genre of endless runners is based on the success and simplicity of the game "Canabalt". In these cases, games that are "clones" of another are generally not implied to have committed any intellectual property infractions, and otherwise considered legally acceptable practices, although calling such games clones is generally considered derogatory.
NFL GameDay (video game series) NFL GameDay (video game series) NFL GameDay is a series of American football video games for both the PlayStation and PlayStation 2 video game consoles. "NFL GameDay" directly competed with EA Sports' "Madden NFL" Football and Sega's NFL 2K franchises. The "NFL GameDay" series began with "NFL GameDay" released for the 1995-96 NFL season and ended with "NFL GameDay 2005" following EA's acquisition of exclusive NFL licensing. The games were designed by 989 Sports throughout their ten-year duration. "NFL GameDay" is the first video game in the "NFL GameDay" series. It was released in 1996 on the PlayStation by Sony