Max Payne 2 - The Fall of Max Payne cheats and cheat codes for XBox

Enable cheat mode - Unlock all levels and game modes:
During the game play, push X, X, A, Left, Right, Left, Right, X, X, X, 
A, Left, Right, Left, Right buttons. After, press Start + Select to go 
back to the main menu, then choose the "New Game" option. 
Note: You cannot turn this cheat off.

Part 1, Chapter 6: Kung Fu poster: 
Go through the fun house until you reach Mona's hideout. Once inside, 
look around Mona's gym area and should find a poster of the famous 
Max Payne Mod "Kung Fu" 
by Kenneth Yeung. 

Restore health:
Save during game play, then return to the main menu. 
Load the game and you will have full health when you resume.

Unlock Hard Boiled, New York Minute, and Dead Man Walking modes
Finish the game once in Detective mode 

Unlock Dead On Arrival mode:
Finish the game on the "Hard-Boiled" mode

View Special ending
Finish the game in Dead On Arrival mode