Sanity: Aiken's Artifact Cheats

Sanity: Aiken's Artifact Invincibility Cheat (God Mode)
Enter mptedthehead into the chat window box and press the ENTER key. When this cheat is activated Agent Cain will lose no health points when attacked and will not lose his sanity when using Talents. This cheat will not keep you alive if you fall however so you'll still want to save often with this cheat on.

Sanity: Aiken's Artifact Unlock All Single Player Levels
Enter mpshipit into the chat window box and press the ENTER key to make all single player levels available to play. After you enter the cheat code press the ESC key or click Menu on the Active Talent Bar to bring up the Game Menu. From here select Main Menu and then select Single Player. Now select Chapters and then choose the chapter you want to play (chapters 1 to 6). Finally select the name of the level you want to play and get right into the game.

Sanity: Aiken's Artifact 100% Santity and Health and All Essential Items
Enter mpjuiceme into the chat window box and press the ENTER key. Back in the game you'll notice that your Sanity and Health meters are at 100% and you will also find all the items you need in the game.