ME2: Successfully recruit the quarian

ME2: Gain the loyalty of the Professor

ME2: Thresher Maw defeated

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

ME2: Gain the loyalty of the Cerberus Officer

ME2: Complete 5 missions discovered by scanning unexplored worlds

ME2: Warp the barriers of 25 enemies

ME2: Successfully recruit the biotic Convict

ME2: Gain the loyalty of the mercenary

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

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

ME2: Disrupt the shields of 25 enemies