Ahh another day and another game developed and published by none other than the infamous EA (Electronic Arts). The Godfather II, developed by EA's Redwood Shores division, is based upon Francis Ford Coppola's The Godfather II, a crime family movie which follows the Corleone family directly where they left off from the events of The Godfather.
Perhaps 'based upon' isn't really the expression to use here so I'll use 'loosely based on' instead, as while it may be called The Godfather II, the game really only features the characters, the setting and the rival families and does not follow the same path in storyline as the movie.