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

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

ME2: Gain the loyalty of the mercenary

ME2: Incinerate the armor of 25 enemies

ME2: Complete a mission discovered by scanning an unexplored world

ME2: Complete any research project in the Normandy's laboratory

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

ME2: Unlock 15 new Mass Effect 2 codex entries

ME2: Save your crew from an overwhelming attack

ME1: Complete the game on any difficulty

Establish a romantic relationship in Mass Effect 1, 2 or 3

ME1: Complete the Bring Down the Sky mission.

ME1: Use medi-gel 50 times