For Close Encounters
Get 10 one-hit head-shot kills with the shotgun in the single player Campaign.
11/10/2008
11:02:02 PM
Rare 22.1%
Team Player
Complete 5 missions with a full party of 8 in the Cooperative campaign.
11/7/2008
6:50:15 AM
Rare 10.9%
Specter Recon
Collect 50 pieces of gray tech in the Cooperative campaign.
11/7/2008
4:52:18 AM
Rare 15.6%
Socialite
Complete a level online with 3 other players who are not on your friends list
11/5/2008
7:08:54 AM
Rare 18.0%
