Burnout
Fill the Nitrous bar then use it all in one go without hitting anything
2/13/2011
9:46:36 PM
Common 85.7%
Can I Go Home Now?
Win a round of either Rush or Conquest on all four Vietnam levels
2/11/2011
11:07:10 AM
Ultra Rare 3.2%
Just Because I Can
Finish first on the scoreboard on any Vietnam level
2/11/2011
9:50:26 AM
Ultra Rare 3.3%
Prospector
Retrieve mineral resources by scanning and probing a planet in the galaxy map
2/9/2011
7:41:38 AM
Common 70.4%
Head Hunter
Perform 30 headshot kills with any weapon on humanoid targets
2/8/2011
8:06:03 AM
Common 67.0%
Highly Trained
View all advanced combat training videos at Shepard's private terminal.
2/8/2011
5:53:19 AM
Rare 45.3%
Perfect Recall
Achieve 100% Synchronization in any Sequence other than Sequence 1.
1/2/2011
10:28:51 PM
Rare 29.0%
Overachiever
Score 750 points or more on a single kill (Multiplayer Only).
12/31/2010
10:56:55 PM
Rare 11.0%
Ahead of the Curve
Perform a double or triple escape (Multiplayer Only).
12/31/2010
9:22:57 PM
Rare 13.7%