Several outlets have published lists of the greatest gangster movies, with some focusing on specific aspects of the genre, such as landmark films or those not directed by a particular director. The lists appear to vary in length, with some featuring 50 movies, others 20, and one outlet publishing a list of war movies that may or may not be related to the gangster genre. The exact composition and ranking of the greatest gangster movies is unclear, as different outlets have published different lists.