Cheat Mode
Add a Windows shortcut (or modify your existing one) to ALONE4.EXE and add "wizardmaster" to the end.

(Example: "C:ALONEALONE4.EXE wizardmaster")

Once in the game, go to your Inventory screen and the Cheat Menu will appear.

Bug Exploitation: "Infinite Saves"
As Carnby, when you leave the lobby of the manor, a cutscene begins and you meet Edenshaw. At the end of the cutscene he gives you a charm of saving. If you save immediately after the cutscene ends, then reload, the cutscene will begin again. Repeat. You will gain 4 saves each time.

Unlimited saves:
When leaving the manor's lobby as Carnby, a FMV sequence will play when you meet Edenshaw. In the sequence, he will give you a charm of saving. Immediately save the game when the FMV sequence completes. Keep saving the game repeatedly to get four save uses each time.