Gain the loyalty of the krogan

Confront the Shadow Broker

Evolve any power

Obtain 10 technology upgrades

Successfully recruit the Krogan

Perform 30 headshot kills with any weapon on humanoid targets

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

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

Complete any research project in the Normandy's laboratory

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

Personalize your armor

Save your crew from an overwhelming attack

Join the Stormcloaks or the Imperial Army