ME2: Gain the loyalty of the mercenary

ME2: Fully upgrade a weapon

ME2: Complete the investigation of a derelict alien vessel

ME2: Evolve any power

ME2: Successfully recruit the Assassin

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

ME2: Warp the barriers of 25 enemies

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

ME2: Gain the loyalty of the thief

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

ME2: Complete a mission discovered by scanning an unexplored world

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

ME2: Perform 30 headshot kills with any weapon on humanoid targets