Survive the swarm.

Win a political stand-off.

Explore a lost city.

Defeat a Harvester.

Destroy an Atlas dropped from orbit.

Visit a store in the single-player campaign.

Kill a brute while it's charging you.

Return to active duty.

Keep your team alive through the suicide mission

Reach Level 30 with one character

Visit 100% of the planets in an unexplored cluster

Complete Mass Effect 2 twice, or complete it once with a character imported from Mass Effect 1

Kill enemies with 5 different heavy weapons during the game