Start the game with the "-developerkeys" command line parameter. Start the game, then press [Page Up] or [Page Down] to cycle character models until reaching one of Mona Sax as she appeared when in the shower.
Successfully complete the game in Dead On Arrival mode to view a special ending.
Successfully complete the game on the "Detective" difficulty setting to unlock the Hard Boiled, New York Minute, and Dead Man Walking modes. Successfully complete the game on the "Hard-Boiled" difficulty setting to unlock Dead On Arrival mode.
During the level where you have to find a member of the inner circle in a fancy apartment complex, go to the part where two cleaners are outside the window on the lift. Kill them both and jump down from ledge to ledge until you reach the bottom. Run along the edge of the building until you hear a shotgun blast from the inside and see someone flying out of a window. Kill the cleaner in his apartment but do not go in. Continue along the buildings edge for slightly longer and you will find an open window. Inside, is a memorial for someone.
Play the piano with the dead body on top of it. Max will attempt to play his theme song.
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.
As the battle starts, equip your MP5 and enter the scope mode. Look above the Vlad's location to see four cylinder-like wooden pipes holding the sitting-place (the square-like place that Vlad is on). Shoot the wooden pipes and they will fall out of their places. Remember to dodge Vlad's dynamite. As you shoot the last pipe, the sitting-place will fall down but Vlad is still out of your view. Look up again to see four more wooden pipes that are preventing a large pillar from falling down. Shoot the pipes out and the pillar will fall down, making Vlad move aside avoiding the pillar. After that Vlad, is in your view. Equip any desired weapon (M4 Carbine recommended) and finish him off. Note: Beware of Vlad's molotov burning bombs.
Start the game with "-developer" command line parameter. While playing the game, press ~ to display the console window. Enter one of the following codes at the console window to activate the corresponding cheat function:
|God mode, all weapons, health, infinite ammo||coder|
|Enable God mode||god|
|Disable God mode||mortal|
|Beretta with 1000 ammo||getberetta|
|Colt Commando with 1000 ammo||getcoltcommando|
|Desert Eagle with 1000 ammo||getdeserteagle|
|Dragunov with 1000 ammo||getdragunov|
|Ingram with 1000 ammo||getingram|
|Kalashnikov with 1000 ammo||getkalashnikov|
|Molotov cocktail with 1000 ammo||getmolotov|
|MP5 with 1000 ammo||getmp5|
|Pump shotgun with 1000 ammo||getpumpshotgun|
|Sawed-off shotgun with 1000 ammo||getsawedshotgun|
|Sniper riflewith 1000 ammo||getsniper|
|Striker gun with 1000 ammo||getstriker|
|Unlock story line part 1||getgraphicsnovelpart1|
|Unlock story line part 2||getgraphicsnovelpart2|
|Unlock story line part 3||getgraphicsnovelpart3|
|Jump 10 high||jump10|
|Jump 20 high||jump20|
|Jump 30 high||jump30|
|Show all console commands||help|
|View extended framerate||showextendedfps|
|Clear console window||clear or clr|