Assassin's Creed Cheats for the PS3

Kill Anyone and Unlimited Eagle Vision:

Beat the Game and go back to the story mode.
You can now kill anyone without losing life and use eagle vision even without full life.

Infinite Life Cheat code:

At the main menu press Circle, L2, X, Square, Triangle, R2, L2. This will unlock infinite life

Thanks to Revolution Reader Esho!