ME2: Warp the barriers of 25 enemies

ME2: Gain the loyalty of the Cerberus Officer

ME2: Defend a human colony from attack

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

ME2: Complete a mission discovered by scanning an unexplored world

ME2: Gain the loyalty of the thief

ME2: Successfully shut down the rogue VI in Project Overlord

ME2: Unlock 15 new Mass Effect 2 codex entries

ME2: Successfully recruit the Professor

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

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

ME2: Save your crew from an overwhelming attack