Three-some
Kill at least 3 enemies with a single shot from a grenade launcher in Single Player or Special Ops.
5/8/2010
1:56:21 PM
Common 54.5%
Experimental
Play 5 consecutive Online Head to Head Ranked matches using a different team
2/8/2010
1:03:59 AM
Rare 10.8%
Underdog
Win an Online Head to Head Ranked match using a weaker team than your opponent
2/7/2010
6:55:53 PM
Rare 17.0%
Gutsy Call
Take an Online Head to Head Ranked match to extra time playing as a weaker team than your opponent
1/30/2010
10:55:37 PM
Rare 11.5%
