Gain the loyalty of the Cerberus Operative

Defend a human colony from attack

Obtain 10 technology upgrades

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

Successfully recruit the Professor

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

Unlock 15 new Mass Effect 2 codex entries

Personalize your armor

Defeat 5 psychopaths

Kill 500 zombies

Create a combo weapon

You sacrificed yourself to stop Demichev

Age 15 soldiers to Dust in single player campaign