Return to active duty.

Complete one multiplayer match or two N7 missions.

Survive the swarm.

Kill a brute while it's charging you.

Bring a veteran officer aboard.

Chase down an assassin.

Escape a Reaper in the galaxy map.

Kill 250 enemies.

Evolve any of your powers to rank 6.

Modify a weapon.

Visit a store in the single-player campaign.

Destroy an Atlas dropped from orbit.

Defeat a harvester.

Explore a lost city.

Win a political stand-off.

Reach level 15 in multiplayer or level 50 in single-player.

Complete three multiplayer matches or five N7 missions.

Defeat an old adversary.

Send a warning across the galaxy.

Make the final assault.

Mission accomplished.

Stop a Cerberus kidnapping.

Call down an orbital strike.

Extract ancient technology.

Dispatch 10 probes to retrieve people or resources in Reaper territory.

Sabotage a dreadnought.

Set 100 enemies on fire with powers.

Evacuate a scientific facility.

Kill 1,000 enemies.

Perform any combination of 50 biotic combos or tech bursts.

Complete Mass Effect 3 twice, or once with a Mass Effect 2 import.

Finish all multiplayer maps or all N7 missions in single-player.

Discover an enemy's monstrous origin.

Start a character in multiplayer or customize a character in single-player.

Establish or rekindle a romantic relationship.

Disable a group of fighter squadrons.

Lift 100 enemies off the ground with powers.

Obtain two non-customizable suits of armor.

Promote a multiplayer character to the Galaxy at War or import an ME3 character.

Reach level 20 in multiplayer or level 60 in single-player.

Kill 100 enemies with melee attacks.

Kill 10 guardians with headshots from the front while their shields are raised.

Hijack an Atlas mech.

Learn more about the Prothean Empire.

Attain the highest level of readiness in each theater of war.

Deliver most of the Galaxy at War assets to the final conflict.

Upgrade any weapon to level 10.

Find all required intel to help Eden Prime's colonists.

Overload the shields of 100 enemies.

Investigate a sinister conspiracy.

Kill 5,000 enemies.

Rescue a civilian from Reaper forces.

Free Omega from Cerberus Occupation.

Find the Talon leader.

Uncover an ancient secret.

Use clues to pinpoint the exact location of an objective.

Go undercover to follow a lead.

Discover a plot against you.

Stop an out-of-control scheme before it's too late.

Infiltrate an enemy stronghold with your crew.

Throw a party for your friends.

Finish the game on Insanity without changing difficulty after leaving Earth.

Finish all multiplayer maps on Gold or all single-player missions on Insanity.

Win a prize at one of the arcade games.

Complete all the Command Center side-missions on Omega.

Defeat a group of Spectre-level opponents on Normal, Hardcore, or Insanity.

Investigate a strange occurrence in the combat simulator.

Score 9999 points in the combat simulator on Normal, Hardcore, or Insanity.