Bring a veteran officer aboard.
Destroy an Atlas dropped from orbit.
Explore a lost city.
Survive the swarm.
Sabotage a dreadnought.
Call down an orbital strike.
Disable a group of fighter squadrons.
Win a political stand-off.
Extract ancient technology.
Defeat an old adversary.
Send a warning across the galaxy.
Discover an enemy's monstrous origin.
Stop a Cerberus kidnapping.
Evacuate a scientific facility.
Make the final assault.
Master and Commander
Deliver most of the Galaxy at War assets to the final conflict.
Lost and Found
Dispatch 10 probes to retrieve people or resources in Reaper territory.
Long Service Medal
Complete Mass Effect 3 twice, or once with a Mass Effect 2 import.
Finish the game on Insanity without changing difficulty after leaving Earth.
Establish or rekindle a romantic relationship.
Escape a Reaper in the galaxy map.
Hijack an Atlas mech.
Defeat a harvester.
Tour of Duty
Finish all multiplayer maps or all N7 missions in single-player.
Obtain two non-customizable suits of armor.
Complete one multiplayer match or two N7 missions.
Complete three multiplayer matches or five N7 missions.
Reach level 15 in multiplayer or level 50 in single-player.
Reach level 20 in multiplayer or level 60 in single-player.
Discover a plot against you.
Go undercover to follow a lead.
Infiltrate an enemy stronghold with your crew.
Stop an out-of-control scheme before it's too late.
Throw a party for your friends.
King of the Castle
Win a prize at one of the arcade games.
Investigate a strange occurrence in the combat simulator.
Score 9999 points in the combat simulator on Normal, Hardcore, or Insanity.
The One and Only
Defeat a group of Spectre-level opponents on Normal, Hardcore, or Insanity.