All Weapons, Unlimited Ammo, NoCLip, etc:
To get access to the game console, you need to start maxpayne.exe with the command line parameter "-developer".
Once you have the game running in developer mode, you get access to the game console with F12.

coder
god
mortal
c_addhealth (100)
GetAllWeapons
GetInfiniteAmmo
Mortal
ShowFPS
SetWoundedState
SetNormalState
NoClip
NoClip_off
GetBaseballbat
GetBeretta
GetBerettaDual
GetDualBeretta
GetDesertEagle
GetSawedShotgun
GetPumpShotgun
GetJackhammer
GetIngram
GetIngramDual
GetDualIngram
GetMP5
GetColtCommando
GetMolotov
GetGrenade
GetM79
GetSniper
GetHealth
GetPainkillers
GetBulletTime

View all models:
Instead of -developer use -developerkeys and in the game use F11 to bring up statistics and PGUP and PGDOWN to change character model. You can select everyone in the game, but you can't use F12 to use normal cheats. This is for fun only

All Level's:
Start the game whit -Developers , now press F11 OR F12 to bring the console in the window bar , and type some codes Below:

GetGranadeUn - Get granade ,unlimited AMMO
AllWeaponUn - Get All Weapon's,Unlimited AMMO

Take Screenshots:
To take screenshots in the game you have to type in "-screenshot" as the command line parameter (C:\Max Payne\maxPayne.exe -screenshot). Then when you are playing press F10 to take a screenshot.

Go Through Doors:
Start maxpayne with maxpayne.exe -developer
then press F12 to bring down the console.
Type in noclip
Then go Trough doors, if not works try trowing yourself trough them....
To go normal again type noclip_off