Hack a geth collective

Confront the Shadow Broker

Help the Justicar resolve her mission

Gain the loyalty of the quarian

Successfully recruit the Assassin

Warp the barriers of 25 enemies

Gain the loyalty of the mercenary ("Cerberus Pack" downloadable content)

Gain the loyalty of the krogan

Gain the loyalty of the Professor

Complete the investigation of a derelict alien vessel

Perform 30 headshot kills with any weapon on humanoid targets

Gain the loyalty of the thief