Betrayal in the Underworld: 10 Crime Films

Description: While not exclusively about betrayal within a gang, the film explores the theme through Michael Corleone's increasing paranoia and the betrayal by his brother Fredo, which has profound consequences.

Fact: It was the first sequel to win the Academy Award for Best Picture.

Description: Martin Scorsese's masterpiece about the rise and fall of Henry Hill in the mob world is rife with betrayal, from the infamous Lufthansa heist to the ultimate downfall of the crew.

Fact: The film was based on the book "Wiseguy" by Nicholas Pileggi, who co-wrote the screenplay with Scorsese.

Description: Quentin Tarantino's debut feature film is a study in paranoia and betrayal among a group of criminals after a botched diamond heist, with each suspecting the other of being the rat.

Fact: The film was made on a budget of just $

Description: Michael Mann's epic crime drama features a cat-and-mouse game between a master thief and a relentless cop, with betrayal playing a pivotal role in the unfolding drama, particularly through the character of Waingro.

Fact: The diner scene where Neil and Vincent meet was improvised by Al Pacino and Robert De Niro, making it one of the most iconic moments in cinema.

Description: A film that revolves around the enigmatic Keyser Söze, where betrayal is the key element in unraveling the mystery of a heist gone wrong and the identity of the mastermind behind it.

Fact: The film's twist ending has become one of the most discussed in cinema history, with Kevin Spacey's performance earning him an Academy Award.

Description: Based on a true story, this film follows an FBI agent who infiltrates the mob, forming a bond with a low-level mobster, leading to a heart-wrenching betrayal when his true identity is revealed.

Fact: Johnny Depp's performance was so convincing that real-life mobsters reportedly thought he was an actual undercover agent.

Description: This modern classic by Martin Scorsese delves into the lives of an undercover cop infiltrating the Irish mob and a mole in the police force, creating a web of deceit and betrayal that keeps viewers on the edge of their seats.

Fact: The film was inspired by the Hong Kong thriller "Infernal Affairs." It also won four Academy Awards, including Best Picture.

Description: David Cronenberg's film about the Russian mafia in London, where loyalty and betrayal are central themes, particularly through the character of Nikolai, who navigates the treacherous waters of the Vory v Zakone.

Fact: Viggo Mortensen learned Russian for the role and even got a real tattoo to match his character's criminal markings.

Description: Ben Affleck directs and stars in this tale of bank robbers in Boston, where loyalty is tested when one of the crew falls for a victim, leading to a chain of betrayals and consequences.

Fact: Affleck did extensive research, including spending time with real-life bank robbers to ensure authenticity in the film's portrayal of crime.

Description: Sean Penn stars as an undercover cop who returns to his old neighborhood to infiltrate the Irish mob, only to find himself torn between loyalty to his childhood friends and his duty.

Fact: The film was shot on location in Hell's Kitchen, New York, adding to its gritty realism.