Successfully recruit the Krogan

Successfully recruit the Justicar

Gain the loyalty of the Cerberus Officer

Defend a human colony from attack

Perform 30 headshot kills with any weapon on humanoid targets

Retrieve mineral resources by scanning and probing a planet in the galaxy map

Complete all test chambers in all courses of co-op

Dance in front of a turret blocked by a hard light bridge in co-op

Complete any research project in the Normandy's laboratory

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

Complete all test chambers in the Hard-Light Surfaces co-op course

Return to active duty

Complete all test chambers in the Mass and Velocity co-op course