Cheat Mode
Go to codes at the options menu then type the code in:
Effect - Code
All Visual Database entries Unlocked - Apocrypha
All bonuses Unlocked - Et In Arcadia Ego
Double Health - Sacred Feminine
God Mode - Vitruvian Man
Level Select - Clos Luce 1519
One Hit Fist Kill - Phillips Exeter
One Hit Weapon Kill - Royal Holloway