Assassin's Creed Hints, Tips

God mode

Kill AnyoneAfter you beat the Game, go back to story mode with the same game and you can kill anyone without losing life.

Easy fights

Note: Only attempt this technique if they are fluent in the Rank 2 skill "Counter" and they have enough synchronization bars (a.k.a., life bars). One and a half rows of bars will do. When in battle, equip your hidden blade. With this equipped, all of your counters will score an instant kill.
You can even instantly kill tougher ranked guards (for example, the Teutonic guards in Acre when hunting Sebrand). Also, most of the time using the hidden blade in battle will scare the last one or two (even three if you are lucky) guards, causing them to run away. However because you do not have a weapon that is sufficient enough to block a full sized enemy blade, all incoming attacks will hurt you.

Completion bonuses

Successfully complete the game. When the Memory Blocks are played again in Story mode you can kill anyone without penalties. Additionally, you will be able to use Eagle Vision at any time regardless of Synchronization levels inside of the Animus.

Transformers reference

Travel to the southwestern-most vigilantes in the poor district of Damascus. On one of the buildings around them, you should see an outcropping in the wall, climb on it and you will see that it looks exactly like G1 Optimus Prime in vehicle mode. Note that there may be more than one outcropping in the area, so look carefully. If you lose sight of the vigilantes, you have gone too far.

Hidden messages

After killing Al Muaiam and returning to the real world, listen to the conversation about how they going to kill you. Turn on your Eagle Vision and look at the floor. There are some mixed up letters on both sides of the Amnius. You should see on the side closest to the main door:

M O R Y M N O E S
E N C E O L C H T
H O N B T L O T C
T D E O S A T O A
P E D S N L S T F
L D D U O O E T E
E A I E I R I N T
H S H K T T K E R
T U A A A N S S A

To decode this, start reading at the bottom right hand corner to the top right hand corner, so you will start at "A" and stop at "S". It will spell a real word. Do this for all of the columns and it will read:
ARTEFACTS SENT TO THE SKIES TO CONTROL ALL NATIONS TO MAKE US OBEY A HIDDEN
CRUSADE DO NOT HELP THEM
Next, do the same thing to the mixed letters on the other side of the Amnius:

A
D R H
O O D T M
W H B I T D O
E U S Y S I N S E
A R O O M R E A Y N R
I S E Y T N I D L M I D E
T W I H W Y I E A U D A Y H T

It will spell out:
THEY DRAINED MY SOUL AND MADE IT THEIRS I DRAINED MY BODY TO SHOW YOU WHERE
I SAW IT.