Truth File 8
To get truth file eight, you have to go to a wall located at San Lorenzo. You must do this while you are on the roof. When you get to the wall, you will see a puzzle. In the puzzle you must locate pieces of Eden. Then you need to position the flame over the image of Joan on the world map. Take the photo of Rasputin and place it at the very top of the photo of Czar Nicholas II.
Truth File 11
For truth file 11 you need to start from the floor instead of on the roof. You will find the puzzle beneath an arch of stone located at Antico Teatro Romano. To solve the puzzle, you first need to highlight the bulbs. Then you need to highlight the photo that is just above the doorway. Highlight this photo in the middle. Finally, you will have to highlight the lap of Nikola Tesla.
Truth File 14
Truth file 14 can be obtained by swimming beneath the Ponte Di Rialto bridge. You will find the puzzle at the edge of the water on a wall. To solve it, just select the paintings that contain the images of Jupiter, Zeus, Cupid, Swan and Europa.
Truth File 18
For truth file 18, you have to start from the roof again. The puzzle for this one will be at San Pietro Di Castello and will also be on a wall. Solving the puzzle requires you to line up all of the wheels a certain way. First move them so that they show 6 equals M or YYY. They should also indicate that 0 equals the symbol of the chalice and that 3 equals the sign for "less than." Finally, position the symbol over the thickest blood vessels in the picture.