Accomplishing certain feats in "Gears of War 3" will unlock awards for your avatar. Here's what's available.
MARCUS'S DOO-RAG
Complete the campaign on Casual or higher.
LOCUST DRONE MASK
Earn the "Welcome to Beast Mode" achievement for completing 12 waves of Beast mode.
HORDE SHIRT
Earn the "Welcome to Horde Mode" achievement for completing 10 waves of Horde mode.