The Basics
Complete one of the missions you receive in the mission log.
12/22/2008
6:37:02 PM
Common 89.1%
Get Your Right Foot Wet
Complete a match in Competitive Co-Op mode. (Online co-op only)
11/19/2008
12:11:14 AM
Rare 16.8%
Get Your Left Foot Wet
Complete a match in Campaign Co-Op mode. (Online co-op only)
11/18/2008
10:57:10 PM
Rare 12.6%
Carlson's Raiders
Complete 'Semper Fi' on any difficulty. (Solo only)
11/18/2008
11:13:26 AM
Common 58.2%