Ubisoft has created a great Twitter app to help promote its upcoming Assassin's Creed II. From the Assassin's Creed Twitter page you can sign up to link your Twitter account to the app.

Once you've done that you're off and running. Check your @reply inbox on Twitter because you'll soon receive an assignment to take out a fellow player. To do this, you just go back to the web site and there is a built-in Twitter client where you can choose an action. It ends up looking like this:

@assassins_rome slash @LunabeanMedia.

At any given time, you may find yourself being hunted or being the hunter. At your disposal are a number of weapons and escapes, complete with upgrades as you rise in the ranks of the Twassassins.

We're @lunabean and @LunabeanMedia, so watch your back and "boo!"

If you want more info, you can check out @assassinscreed.