Complete a mission discovered by scanning an unexplored world

Gain the loyalty of the thief

Successfully recruit the Assassin

Evolve any power

Thresher Maw defeated

Gain the loyalty of Archangel

Confront the Shadow Broker

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

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

Successfully recruit the biotic Convict

Successfully recruit the Professor

Successfully recruit Archangel

Unlock 15 new Mass Effect 2 codex entries