ME2: Gain the loyalty of the Cerberus Officer

ME2: Defend a human colony from attack

ME2: Successfully recruit the biotic Convict

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

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

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

ME2: Save your crew from an overwhelming attack

ME1: Accumulate 75% of total possible Paragon or Renegade points

ME1: Use biotic Singularity 25 times

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

ME1: Use biotic Warp 25 times

Kill 250 enemies in Mass Effect 1, 2 or 3

ME1: Use Charm or Intimidate to resolve an impossible situation