There is a list here http://en.wikipedia.org/wiki/Avatar_(Xbox_360)
So far the arcade game Splosion Man and the Halo add on Waypoint are some of the games that have Avatar Awards. Left 4 Dead 2 also has 5 avatar awards.
the new lips game also has avatar awards
MLB 2k10 also has some shirts that I've unlocked i think there's 5 total.
Red Dead Redemption contains a few avatar awards, hidden in chests in the game.
Earthworm Jim HD
Crackdown 2
Doom II
Duke Nukem: Manhattan Project
Darwinia+
Alan Wake
Deathspank
Ancients of Ooga
Snoopy Flying Ace... It pretty much seems that most Arcade games now days have one or two.
I'd like to add a couple to this list:
Deathspank 2
Hydrophobia
Fable 3
Comic Jumper
MTG: Duels of the Planeswalkers
LIMBO
Perfect Dark (XBLA one)
Halo Reach
South Park Lets Go Tower Defence Play (must download from x-box live marketplace)
Dead to Rights Retribution
Here is some more....
Full House Poker
Pinball FX2
Sonic 4 Episode 1
Lazy raiders
Costume Quest
A World of Keflings
Halo Waypoint
Chat with our AI personalities
Achievements and avatar awards.
NNNNNNNNNNNNNNNNNNNNNNNNNNNNOOOOOOOOOOOOOOOOO!!!!! if you were able to make an avatar on Playstation3 it would be copying Xbox 360 BUY XBOX 360 NOW!!!!!!!!!!!!!!!!!!!!!!
Your Xbox should ask you to delete an avatar when you run out of space for one
You can do plenty of things. You can connect to xbox live and chat with friends, download games and videos, connect with friends and play a multiplayer game. You can get these little awards called achievements for every game that you buy when you play 'em and they up your gamerscore for you. You can create your own avatar and even play as you r avatar on some games.
kill 100 ememies without dying , then go to customize avatar then go to awards . It wont let me select it though emin3m rocks