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

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

ME2: Defend a human colony from attack

ME2: Incinerate the armor of 25 enemies

ME2: Disrupt the shields of 25 enemies

ME2: Complete a mission discovered by scanning an unexplored world

ME2: Successfully recruit the Professor

ME2: Make 20 enemies scream as they fall or are set on fire

Kill 100 enemies with melee attacks in Mass Effect 1, 2 or 3

ME2: Evolve any power

ME2: Save your crew from an overwhelming attack

ME1: Acquire all trophies

ME1: Complete Ilos