Gain the loyalty of the Cerberus Officer

Successfully recruit the Justicar

Successfully recruit the Krogan

Obtain 10 technology upgrades

Successfully recruit Archangel

Complete any research project in the Normandy's laboratory

Perform 30 headshot kills with any weapon on humanoid targets

Return to active duty

Save your crew from an overwhelming attack

Complete playthrough with shield damage greater than health damage

Complete the majority of the game

Use Charm or Intimidate to resolve an impossible situation

Complete the Bring Down the Sky mission.