Willpower alone isn't enough in battle.
Complete the Arrival DLC ("Arrival" downloadable content) - Mass Effect 2
Survive all five waves in the battle for Object Rho ("Arrival" downloadable content) - Mass Effect 2
Rescue Dr. Amanda Kenson without attracting hostile attention ("Arrival" downloadable content) - Mass Effect 2
2,304/2,30459/591/12/26/650/50
68/3,7014/680/10/30/144/50
494/2,40817/280/11/77/99/11