This list is from IGN Entertainment. Although they missed some of classic crime movies from the past (such as Concrete Jungle), they did include few that deserve such an honor.

Ranked accordingly:

20. Ocean's 11
Steven Soderbergh's excellent remake is unquestionably better than the original film it takes as a jump off point.


19. Leon (The Professional)
Leon and Portman make an indelible, sometimes even sweet team, even when Gary Oldman's monstrously entertaining overacting claims possession of the entire film.


18. Heat
Featuring a historic showdown between Robert De Niro and Al Pacino


17. The Maltese Falcon
John Huston's first film and one of the first films to bring the larger-than-life Bogart from bad guy to superstar leading man, Falcon remains one of the great noir pictures of all time.


16. Scarface
Written by Oliver Stone and starring Al Pacino as Miami crime lord Tony Montana, the film chronicles his rise to power amid the cocaine-obsessed Eighties. The film also helped to launch Michelle Pfeiffer into the limelight.


15. LA Confidential
The film deals with Los Angeles police corruption and the lives of celebrities in the 1950s, stars Kevin Spacey, Russell Crowe, Guy Pearce, James Cromwell, Kim Basinger and Danny DeVito.


14. Once Upon a Time in America
Robert De Niro, sharing the screen with James Woods, Elizabeth McGovern and Treat Williams among others, offers a muted but not joyless performance as Noodles, the nucleus of a crew of criminals who make a meteoric rise to the top of the New York underworld.


13. The French Connection
The French Connection was the first R-rated flick to win the Oscar for Best Picture.


12. Chinatown
Featuring Academy Award-winning screenplay by Robert Towne, Roman Polanski's Chinatown follows private detective J.J. Gittes (Jack Nicholson) as he investigates a murder and stumbles onto a conspiracy involving the future of Los Angeles.


11. Casino
The story is drawn from true events in the life of Frank "Lefty" Rosenthal, who ran a number of casinos in Las Vegas for the mob in the 1970s and '80s.