Deja Marty
Perfectly repeated dialog while repeating Doc's temporal experiment
8/3/2011
6:09:33 AM
Rare 33.4%
The Ultimate Sacrifice
Complete the Arrival DLC ("Arrival" downloadable content)
8/2/2011
1:31:19 AM
Rare 10.3%
Last Stand
Survive all five waves in the battle for Object Rho ("Arrival" downloadable content)
8/2/2011
1:01:04 AM
Very Rare 5.1%
Covert Action
Rescue Dr. Amanda Kenson without attracting hostile attention ("Arrival" downloadable content)
8/2/2011
12:26:09 AM
Ultra Rare 4.9%
Digital Exorcist
Successfully shut down the rogue VI in Project Overlord
7/30/2011
4:42:51 AM
Common 52.2%
Mission Accomplished
Save humanity throughout the galaxy from certain annihilation
7/26/2011
7:21:36 AM
Rare 45.3%
Insanity
Complete the game on the "Insanity" difficulty level without changing the setting
7/26/2011
7:21:21 AM
Ultra Rare 3.9%
Long Service Medal
Complete Mass Effect 2 twice, or complete it once with a character imported from Mass Effect 1
7/26/2011
7:20:59 AM
Rare 31.0%
Tactician
Hit 20 different targets with multiple biotic powers to combine the effects
7/25/2011
9:31:20 PM
Very Rare 8.7%