ME2: Thresher Maw defeated

Kill 2,000 enemies in Mass Effect 1, 2 or 3

ME2: Gain the loyalty of the Assassin

ME2: Gain the loyalty of the biotic Convict

ME2: Gain the loyalty of the Cerberus Officer

ME2: Complete the investigation of a derelict alien vessel

ME2: Successfully recruit the Justicar

ME2: Hit 20 different targets with multiple biotic powers to combine the effects

ME2: Complete a mission discovered by scanning an unexplored world

ME2: Visit 100% of the planets in an unexplored cluster

ME2: Incinerate the armor of 25 enemies

ME2: Successfully recruit the krogan