The Da Vinci Code - The Da Vinci Code Cheat Code

Password - Effect
Et in Arcadia ego - All bonuses unlocked
Apocrypha - All Visual Database entries
Sacred Feminine - Double health
Vitruvian Man - God mode must be used for both Robert and Sophie,
Clos Luce 1519 - Level select
Phillips Exeter - One hit fist kill
Royal Holloway - One hit weapon kill

Secret Levels:
Earn these levels by completing the game.

Rosslyn Chapel Revisited - Complete the game.
The Louvre Revisited - Complete the game.

Choose the "Codes" selection at the "Options" menu:

THE VITRUVIAN MAN - Louvre Revisted level unlocked

Mansion: Shed box:

The code for the box in the shed is 13, 21, 34.

Answer to the Puzzle "OH LAME SAINT"

The Answer to the Anagram puzzle "OH LAME SAINT" is "THE MONA LISA"

Level 7 Cryptogram Answer
The answer is "OUTDOORS THE GRACEFUL WATER YOU WILL SEE THROUGH DEDICATION YOU MUST FIND THE KEY"

THE LOUVRE REVISITED Secret Level:
This level is an extra awarded to you after completing the game. There are 9 cryptogram puzzles in here to solve in total, and they can be found with the UV light on the paintings that represent each of the 9 levels of the game. You have one puzzle for every secret you found in the game.

ANSWERS TO THESE CRYPTOGRAMS

The Louvre Museum Painting:
"YOU SHOULD NOT HAVE RUN MONSIEUR SAUNIERE NOW TELL ME WHERE IT IS"

St. Sulpice Painting:
"THE SISTER MUST HAVE BEEN CALLING PRIORY MEMBERS WHEN SHE WAS ATTACKED"

Normandy Mansion Painting:
"ITS THE PRINCESS SOPHIE KEY MY GRANDFATHER PROMISED ME"

Bank of Zurich Painting:
"IT IS THE CRYPTEX THIS IS BASED OFF OF A DESIGN BY DA VINCI"

Chateau Villett Painting:
"THE LEGEND OF THE HOLY GRAIL IS A LEGEND ABOUT ROYAL BLOOD"

Biggin Hill Airfield Painting:
"SAUNIERE BROUGHT US TOGETHER TO FOLLOW THESE CLUES FOR A REASON"

Temple Church Painting:
"SILAS TAKE THE KEYSTONE FROM MR LANGDON TEABING IS OUR HOSTAGE NOW"

Westminster Abbey Painting:
"TEABING FELT THE TRUTH CRASHING DOWN ON HIM THE GRAIL WAS LOST TO HIM"

Rosslyn Chapel Painting:
"THE QUEST FOR THE GRAIL IS THE QUEST FOR THE DIVINE IN EACH OF US"

ROSSLYN CHAPEL REVISITED Secret level:
This level is also unlocked by completing the game, but unlike The Louvre Revisited, there is absolutely nothing to complete in here. The rotating solar system model where the globe was during the game allows you to play various music tracks from the game and examining the Sun gives you a full screen view of the solar system. In the room that had the trap door in the floor, there is a table that will display all of Da Vinci's invention models that you found during the course of the game. Take the trapdoor down to the lower room and in here you will find all the concept art that you unlocked by finding the secrets during the game. And thats it your DONE

Table of Chemicals Answer:
At the table with the chemicals you want 1 shot of Chitinase, 1 shot of Dismutase and 1 shot of Catalase 1st, 2nd and 4th chemicals and you'll have your mixture. 2It glows red" Now look by a yellow toolbox and find the TOWEL. Combine the towel and the chemical. Take the resulting red rag and use it on the dirty painting.

The Mona Lisa UV Light Puzzle:
When holding the UV light up against the Mona Lisa you will see cryptic lettering, Highlight every letter individualy and then a keyboard will appear The Answer to this cryptic clue is " DA VINVI PAINTED THOSE THAT KNEW BETWEEN BACCHUS AND URIEL LIES THE CLUE"