Atacama Desert Conquered
Successfully complete Atacama Desert in Onslaught mode on any difficulty
10/1/2011
3:59:12 PM
Ultra Rare 3.2%
Touchdown
Complete a landing at a landing zone in Realistic or Veteran difficulty
9/29/2011
3:28:33 PM
Rare 11.2%
Wave Goodbye
Complete a specific mission objective in "The Sky is Burning"
9/28/2011
3:47:27 PM
Common 63.8%
