By playing games.
Achievements and avatar awards.
no
There are no avatar awards for Assassin's Creed II. Sorry.
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Under My Xbox on Xbox.com or your dashboard you will see a spot to create your avatar.
Your Xbox should ask you to delete an avatar when you run out of space for one
kill 100 ememies without dying , then go to customize avatar then go to awards . It wont let me select it though emin3m rocks
Yes
avatar
The Xbox 360 marketplace is a place to buy games, trailers, items for your avatar and profile.
yes but u need enough memo to use the avatar
I actually asked the same question. Some arcade games (I think in the marketplace) have avatar awards, such as doom 2. The only game I have awards for are Halo Reach, but most new games have some, just go to 'Edit avatar', go to 'Awards' and see which of your games have them.