The Ultimate Sacrifice
Complete the Arrival DLC ("Arrival" downloadable content)
4/11/2011
9:36:53 PM
Rare 10.3%
Mission Accomplished
Save humanity throughout the galaxy from certain annihilation
4/6/2011
9:02:21 PM
Rare 45.3%
Master at Arms
Kill enemies with 5 different heavy weapons during the game
4/6/2011
8:32:09 PM
Rare 28.1%
