Cheat mode
Simply choose the "Codes" selection at the "Options" menu. Then, type in one of the codes below to activate the desired cheat.

1 This has be used for both Robert and Sophie, as the game will end if either of them dies.
2. This code will make every level available, every Visual Database entry, the music Orrery, every concept art in Rosslyn, every Louvre painting that are shown in the substitution puzzles, and every anagram puzzle in Rosslyn.

Hints & Tips

"Rosslyn Chapel Revisited" level
Finish the game completely, then use the rotating solar system model that appears where the globe was in the main game. You can play the music from the game. Observe the sun in the model for a full screen view of the solar system. Then go to the room that had the trapdoor in the floor in the main game. Look at the table to see every of Leonardo Da Vinci's invention model that were used in the main game. Now use the trapdoor to go down to the lower room to see the concept art.

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

Puzzles

Puzzle 1: Simply rearrange the "OH LAME SAINT" into "THE MONA LISA".

Puzzle 2: The Mona Lisa code is "Da Vinci Painted those that knew between Bacchus and Uriel lies the clue".

Puzzle 3: The painting puzzle to get the dirt off is First Chitinase, then Dismutase, then Catalase.

Puzzle 4: The six statue puzzle is Venus in the center, Jupiter on the top, to the right of Mars, to the right of that, Aeneas, to the right of that Cupid, to the right of that Vulcan.

Puzzle 5: The floor safe puzzle is Sion across the center.

Puzzle 6: The solution to the cryptogram puzzle in level 7 is "OUTDOORS THE GRACEFUL WATER YOU WILL SEE THROUGH DEDICATION YOU MUST FIND THE KEY"

"The Louvre Revisited" level puzzles
After you finish the game you can go into The Louvre and play "The Louvre Revisted" bonus level. The puzzles are on the paintings that correspond to each of the nine levels of the game.

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"

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"

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"