Bull Shifters Shirt Unlock the Bull Shifters Shirt by winning 10 games of Versus.
Depeche Mode Shirt Unlock the Depeche Mode shirt by rescuing Gnome Chompski from the Dark Carnival.
Left 4 Dead 2 Shirt Unlock the Left 4 Dead 2 Shirt by winning 10 games of Scavenge.
Zombie Hand Shirt Unlock the Zombie Hand Shirt by killing 10,000 Infected.
Med Kit Unlock the Med Kit by beating all five campaigns.
Left 4 Dead 2 Hat (DLC Needed!) Play any Level of The Passing Campaign.
Gnome Prop (DLC Needed!) Unlock the Gnome by playing any 6 Mutations.