Complete the indicated task to unlock the corresponding Avatar Award.

Avatar	How to unlock
Bull Shifters Shirt	Win ten games of Versus.
Depeche Mode Shirt	Rescue Gnome Chompski from the Dark Carnival.
Left 4 Dead 2 Shirt	Win ten games of Scavenge.
Med Kit	Beat all five campaigns.
Zombie Hand Shirt	Kill 10,000 Infected.