Alone in the Dark: The New Nightmare cheats and cheat codes for PC

Cheat mode:
To enable the cheat mode, run the game with the "wizardmaster" command line 
parameter (without quotes). Example: c:\ALONE4\ALONE4.EXE WIZARDMASTER

Go to the inventory screen to access to the unlocked cheat option.

Skip events:
Repeatedly press Action to skip past events during game play. 

Infinite Saves
If you play as Carnby, and when you leave the lobby of the manor, 
you will see a FMV sequence and you meet Edenshaw. At the end of the 
movie sequence he gives you a charm of saving. If you save immediately 
after the movie sequence ends, then reload, the cutscene will begin again. 
Repeat the process to get four saves each time.

Hex cheats:
Use a hex editor to write following bytes to specific addresses. 

Item: hex address - bytes 
400 Survival MediKit: 801451D6 - 0190 
Amulets: 801451E6 - 0018
Plasma gun ammo always 100%: 801452FC - 0064 
Unlimited Revolver ammo: 801452CC - 0018 
Unlimited Rocketlauncher ammo: 801452EC - 0018 
Unlimited Shotgun ammo: 801452D4 - 0018 

Hex cheats 2:
Open the savegame _alone4_.XXX.sav with a hexeditor. Remember to have written 
down how much ammo you have in the game. As this far, it seems, that each 
item has a special place, so you cant find the items by their code, but only 
by searching for the number of ammo. Each item has four spaces. You should 
start searching for them from address 0160 to address 01A0 (and maybe further). 
You can only hex ammo-packages, charms of saving and med packs (not weapons or 
their ammo ... so if you havent picked up any extra ammo for a weapon, you wont 
be able to cheat it...). 

For example, you have 15 charms of saving, search for 0f00 in the adresses 
listed above ... its really easy. When you have found what you think to be the 
item you want to cheat, enter a number as you wish (for example ff00 for about 
250, or the ultimate fun number for ammo 3e70).