Rifts
Rifts appear to be breaks in the programming of memories within the Animus, which can be seen using Eagle Vision. Each of the ten are found on key landmarks throughout Rome, and conceal Subject 16's Cluster puzzles in Assassin's Creed: Brotherhood. They are the equivalent of Glyphs from Assassin's Creed II, but instead of revealing a second Truth video, they simply relay the message "The miracle is in the execution" along with an executable file. Accessing the file allows Desmond to go through a virtual obstacle course similar to an Animus Virtual Training Program mission, and ultimately receive a message from Subject 16.
Various hidden messages such as coded numbers and letters, music notes and morse code appear in the rifts.
For example, in Cluster 7, if you zoom in on the picture of the jet, somewhere you'll see the words "We the People" marked 1, 2, and 3, respectively. That seems to imply that all the other numbers are words from the Declaration of Independence...
Locations
Castra Praetoria
In the area where Octavien de Valois was assassinated, on the eastern wall.
Rosa in Fiore
On the north wall of the brothel, on the second floor wall.
Santa Maria dei Miracoli and Santa Maria di Montesant
On the western tower near the left dome.
Aventino
On the Borgia tower.
Castel Sant'Angelo
On the actual cylinder of the castle, on the south side where the top of the outer wall is closest to the cylinder, near a haystack, right below a circular window.
Caserma di Alviano
East side of the wall, on the outside of the perimeter.
Acquedotto Claudia
Near the small town where Leonardo frequently is located at, on the north side of aqueduct. Climb the Borgia tower to reach the top of the aqueduct.
Colosseo
At the very top, northern side of the Colosseo, just west of the View Point.
Palazzo Senatorio
On the back of the Palazzo, near the roof, towards the end of the free-running path.
Pantheon
Inside the Pantheon, on the wall right above the main entrance.
Clusters
Cluster 1
Puzzle 1: Pick out the five images of aristocrats not doing any sort of work.
File:Cluster 1-1--article image.jpg
Puzzle 2: Move your pawn at 2E to 4E. File:Cluster 1-2--article image.jpg
"They become increasingly aware of our existence. We can no longer rely on the divine right of the aristocracy to maintain control. We need a new system, something much more subtle."
Puzzle 3: Hit A/X to "activate" the blinking red light found here:
File:Cluster 1-3--article image.jpg
Cluster 2
"The individual intends only his own gain, and he is in this, as in many other cases, led by an invisible hand to promote an end which was no part of his intention."
Puzzle 1: Turn the first ring left four times, the second and first rings right twice, the third and first rings left three times, and the fourth ring left four times.
File:Cluster 2-1--article image.jpg
"By far the greatest part of those goods which are the objects of desire, are procured by labour; and they may be multiplied, not in one country alone, but in many, almost without any assignable limit, if we are disposed to bestow the labour necessary to obtain them."
Puzzle 2: The first and third rings are linked, as are the fourth and first. Turn the first/third rings right five times, the second ring right five times, the third ring left four times, and the fourth/first rings left twice. File:Cluster 2-2--article image.jpg
"A great empire has been established for the sole purpose of raising up a nation of customers. It cannot be very difficult to determine who have been the contrivers of the whole mercantile system; not the consumers, we may believe, whose interest has been entirely neglected; but the producers, whose interest has been so carefully attended to it."
Puzzle 3: The third ring is linked with the second, as is the fourth with the first. Turn the first ring right three times, the second ring right four times, the third/second rings left five times, and the fourth/first ring right once. File:Cluster 2-3--article image.jpg
"A country that makes provision to increase in inhabitants, whose situation is good, and whose people have a genius adapted to trade, will never fail to be gainers in the balance, provided the labour and industry of their people be well managed and carefully directed."
"lo lo lo lo lo lo lo lo lo lo lo lo lo lo lo lo lo"
Puzzle 4: Move your pawn at 2F to 4F. File:Cluster 2-4--article image.jpg
Puzzle 5: Activate one of the two blinking lights shown below, then quickly activate the other one before your cursor fills up with red.
File:Cluster 2-5--article image.jpg
Cluster 3
"Missing -.. .- .-. -.- -. . ... ... .-.. --- ... - -... -. ..- -- -..."
Morse Code Translated: DARKNESS LOST NUMB
Puzzle 1: Select the area shown below (revealing a hidden Abstergo emblem). File:Cluster 3-1--article image.jpg
Puzzle 2: Enter the symbols below as your passcode. File:Cluster 3-2--article image.jpg
There is a message from Abstergo Industries, written on July 22, 1944. It talks about Ranny Olds, Henry Ford, communism, H. (Hitler?), S. (Staline?) and Rockefeller. It reveals that Abstergo was founded in 1937.
Puzzle 3: Move your pawn at 4F to 5E, into the black knight's path. File:Cluster 3-3--article image.jpg
Puzzle 4: Activate one of the two blinking lights shown below, then quickly activate the other one before your cursor fills up with red.