These are cheats that can be accessed, once unlocked, by going to the 'Chapter Select' feature once you have finished any chapter and selecting any cheats you want applied. Once applied, all stats and Rockstar Social Club accomplishment tracking is disabled.
Bullet Cam on Every Kill - Find all clues
One-Hit Kills - Complete the storyline on Hardcore with the free-aim control modifier on
Unlimited Ammo - Find all of the Golden Gun parts
Unlimited Bullet Time - Get at least a 'Gold' rating on all Score Attack arcade chapters
Unlimited Painkillers - Complete the storyline on Hard
Play the Piano
In Chapter 1, Max can play the piano in the first apartment.
In Chapters 3 and 4, there are TVs throughout the game that show special programs when turned on.
Baby Crying from Max Payne 1 Dream
In the soundtrack of Chapter 8, you can hear the baby crying from the dream sequences of Max Payne 1 in the background.
Finishing the Game on Any Difficulty
Finishing the Game on Medium
Unlock New York Minute mode in Arcade Mode
Finishing the Game on Hard
Unlock Character Select Option in Arcade Mode
Finishing the Game on Old School
Unlock Old School Difficulty
Unlock Hardcore Difficulty
Unlock Unlimited Painkillers Cheat
Finishing the Game on Hardcore
Unlock Max Payne Advanced Character Model
Unlock One Hit Kill Cheat