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.

Defeating the Master
When fighting the Master he will take away your ability to use radar and make it
difficult to see. This also allows him to hit you once and kill you. Lock on to
him and use a throwing knife against him. This will take away his power to blind
you and make him easier to kill.

The first part is simple. Take your sword out, as you will be fighting all your
previous assassination targets. They are fairly easy to kill. Only one counter
is required to kill each of them. For the second part, as soon as Al Mualim
releases you, use your Eagle Vision. The real Al Mualim is the one in yellow.
Focus your attacks on him. In the third part, Al Mualim takes away your
synchronization bar and radar, allowing him to kill you in one hit. Take out
your throwing knives. Look for the Piece of Eden in his hand. Once you see him,
throw a knife at him. Thenm just counterattack/grab break him. Keep repeating
this until he says, "Damn you Altair!" Finish him off with your hidden blade, or
keep attacking him with your sword until he is dead.

Defeating William of Montferrat in Acre
After the guards (or most of them) leave William, drop down from the castle and
slay William. Afterward, "de-target" or deselect, and run up into the castle
buildings and battlement to get away. This is the fastest way of completing the
mission.