Cheat mode:
     Choose  the  "Codes" selection at the "Options" menu. Then, enter
one  of  the  following  codes  to  activate  the  corresponding cheat
function.

God mode:
     Enter  Vitruvian  Man as a code. Note: This must be used for both
Robert and Sophie, as the game will end if either dies.

Double health:
     Enter Sacred Feminine as a code.

One hit fist kill:
     Enter Phillips Exeter as a code.

One hit weapon kill:
     Enter Royal Holloway as a code.

Level select:
     Enter Clos Luce 1519 as a code.

All Visual Database entries unlocked:
     Enter Apocrypha as a code.

All bonuses unlocked:
     Enter  Et  in  Arcadia ego as a code. This will unlock all levels
(including the M0X Louvre level and the M0X Rosslyn level), all Visual
Database  entries,  the  music Orrery, all concept art in Rosslyn, all
Louvre  paintings  that are displayed in the substitution puzzles, and
all anagram puzzles in Rosslyn.