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

ME2: Save your crew from an overwhelming attack

ME1: Complete Ilos

ME1: Use Charm or Intimidate to resolve an impossible situation

ME1: Complete 5 missions with the Alliance sentinel squad member

ME1: Complete 5 missions with the krogan squad member

Kill 250 enemies in Mass Effect 1, 2 or 3

ME1: Complete 5 missions with the asari squad member

Complete training and reenter the Animus.

Experience a Double-cross

Destroy a vehicle in Chapter 9 with an explosive

Defeat 10 enemies with headshots in a row