The hard way
Complete all the campaign missions on Hard difficulty.
11/13/2010
6:51:30 PM
Very Rare 7.3%
Campaign Complete: Normal
Complete all the campaign missions on Normal difficulty.
11/13/2010
6:51:24 PM
Rare 28.5%
Operation Twilight
Unlock and finish the 18th mission of the Campaign on Normal, Hard, or Elite.
11/13/2010
4:10:13 AM
Rare 28.8%
Operation Javelin
Unlock and finish the 17th mission of the Campaign on Normal, Hard, or Elite.
11/13/2010
1:47:01 AM
Rare 29.9%
Operation Wildhorse
Unlock and finish the 16th mission of the Campaign on Normal, Hard, or Elite.
11/13/2010
12:22:08 AM
Rare 30.6%