Completion Bonus

Successfully complete the game. When the Memory Blocks are played again in Story mode, you can kill anyone without penalty.

Escaping from guards

Go to a high roof when chased. Kill the guards that appear. After a few kills, they will either run or give up.

Easy citizen missions

When helping a citizen, do not just attack the guards. Hold L2 and press Square with the dagger ready. This will eliminate one of the guards and give you a better chance. Sometimes you can assassinate two guards before they notice you.

Assassinations

Loud assassination: Hold L1 + R1 and press Square. You can do this while running up to a guard, and it almost always works from any angle. However, it is noisy and causes civilians to run for guards.

Silent assassination: Hold L1 and press Square. It has less of a chance of working, and works best when used behind guards so no one hears you.

Assassination in Jerusalem

When you go to Jerusalem and do the assassination with the guards surrounding you, do not try to fight them off. Instead, turn around and run up the ladder to get to the second floor. A short intermission sequence will show your target running away and up another ladder. Hold R1 + X and run across the chandeliers. The ladder will be to the right. Run up the ladder, and another short intermission sequence will show your target on top of another building. Chase him down, and have your wrist blade enabled (press Up). Then, press L1 to lock onto your target while still chasing him down. When you get close enough, the word "Assassinate" will appear for Square in the upper right of the screen. Press it to complete your task. After another intermission sequence, evade the guards by jumping onto building roofs, hiding, etc. Make your way over to the bureau to complete the memory.

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.