Complete the main story and this empathic sight which enables you to see hidden messages and tell friend from foe can be used whenever you want regardless of the synchronization levels of the Animus machine.

Beat the game and after the credits have completed you will be able view it. The secret ending suggests that there will be a sequel.

Beat the Game and you will be able to replay Memory Blocks in Story mode and kill anyone you like without being penalised.

SuperCheats.com has an exclusive guide for Assassin's Creed. You can check it out here: Assassin's Creed Guide

It is a complete walkthrough of the game with screenshots.

We also have a collection of wallpapers which you can use to customise your PC here:
Assassin's Creed Wallpaper

Loud Assassination:
To do a loud assassination hold LB + RB and press X. This assination can be used while approaching a guard, the only problem is that because it's noisy it will alert other guards.

Silent Assassination:
To do this assassination hold LB and press X. This assassination is most effective when used from behind a guard as nobody will hear a thing.