Return to active duty.

Chase down an assassin.

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

Modify a weapon.

Visit a store in the single-player campaign.

Kill 250 enemies.

Evolve any of your powers to rank 6.

Complete one multiplayer match or two N7 missions.

Kill a brute while it's charging you.

Bring a veteran officer aboard.

Destroy an Atlas dropped from orbit.

Escape a Reaper in the galaxy map.

Set 100 enemies on fire with powers.

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

Defeat a harvester.

Kill 1,000 enemies.

Learn more about the Prothean Empire.

Explore a lost city.

Complete three multiplayer matches or five N7 missions.

Survive the swarm.

Stop a Cerberus kidnapping.

Win a political stand-off.

Sabotage a dreadnought.

Call down an orbital strike.

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

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

Obtain two non-customizable suits of armor.

Investigate a sinister conspiracy.

Disable a group of fighter squadrons.

Discover an enemy's monstrous origin.

Evacuate a scientific facility.

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

Find the Talon leader.

Extract ancient technology.

Send a warning across the galaxy.

Free Omega from Cerberus Occupation.

Defeat an old adversary.

Perform any combination of 50 biotic combos or tech bursts.

Lift 100 enemies off the ground with powers.

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

Discover a plot against you.

Go undercover to follow a lead.

Make the final assault.

Rescue a civilian from Reaper forces.

Infiltrate an enemy stronghold with your crew.

Establish or rekindle a romantic relationship.

Uncover an ancient secret.

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

Mission accomplished.

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

Use clues to pinpoint the exact location of an objective.

Throw a party for your friends.

Kill 100 enemies with melee attacks.

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

Upgrade any weapon to level 10.

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

Overload the shields of 100 enemies.

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

Win a prize at one of the arcade games.

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

Kill 5,000 enemies.

Hijack an Atlas mech.

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

Complete all the Command Center side-missions on Omega.

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

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

Investigate a strange occurrence in the combat simulator.

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