Infernal Affairs (2002)

Two legendary movies about the infiltration/gansters world, and about the humain relationships beyond the differences (cop/gangster).

This movie is also about undercover cops and the battle with morale. It's a widely known legendary movie from Hong Kong.

They both have somewhat similar plot about a cop doing an undercover work in a triad. Both also gave me some sorta same feeling and both are great movies filled with action.

Cruel City is very much inspired by Infernal Affairs and the Hong Kong crime noir.

Both of these shows have: - Under cover cops - Dealing with mole & gangsters - People getting betrayed

Both involves the main character as an undercover cop infiltrating a crime syndicate. Difficult situation of preventing identity from getting exposed.

Both films contain the undercover theme with triads, police and action. But Infernal Affairs has a darker tone and concentrates on the Suspense and Thriller while Hard Boiled is a hardcore violent action film.

A cop undercover for many years and he is thinking that this is the last job! This is identical, right down to the use of morse code and two opposing undercover (one good and one bad).

Both are action movies focusing on undercover cops trying to take down crime organizations.

Tony Leung and Andy Lau reunion. The Goldfinger is directed Felix Chong, who was the screenwriter for Infernal Affairs. Both are also crime mystery films.