Master at Arms
Kill enemies with 5 different heavy weapons during the game
3/2/2011
9:48:50 AM
Rare 28.1%
Tactician
Hit 20 different targets with multiple biotic powers to combine the effects
3/2/2011
8:54:34 AM
Very Rare 8.7%
Digital Exorcist
Successfully shut down the rogue VI in Project Overlord
3/1/2011
10:38:01 AM
Common 52.2%
Operative
Complete a mission discovered by scanning an unexplored world
2/28/2011
7:34:56 AM
Common 60.2%
Revenge!
Gain the loyalty of the mercenary ("Cerberus Pack" downloadable content)
2/28/2011
7:01:58 AM
Rare 30.5%
Head Hunter
Perform 30 headshot kills with any weapon on humanoid targets
2/28/2011
3:40:09 AM
Common 67.0%