After you play through Max Payne once, the "Hard-Boiled" difficulty level and the "New York Minute" game mode are unlocked.
In New York Minute the goal is to complete the levels as quickly as possible. Shooting enemies will give you additional time and the total time is printed upon completion of Part I, Part II and Part III.
The time printed is the net play time, excluding in-game cinematics
Graphic novels, loading levels, saving the game and loading saved games.