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

Unlocked: 26 May 2014 20:52:10

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

Unlocked: 17 Jan 2014 05:10:14

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

Unlocked: 17 Jan 2014 05:10:13

Investigate a strange occurrence in the combat simulator.

Unlocked: 08 Apr 2013 06:32:05

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

Unlocked: 07 Apr 2013 04:23:27

Throw a party for your friends.

Unlocked: 12 Mar 2013 04:30:22

Win a prize at one of the arcade games.

Unlocked: 12 Mar 2013 03:12:31

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

Unlocked: 12 Mar 2013 02:42:30

Infiltrate an enemy stronghold with your crew.

Unlocked: 12 Mar 2013 02:18:08

Go undercover to follow a lead.

Unlocked: 12 Mar 2013 00:28:46

Discover a plot against you.

Unlocked: 11 Mar 2013 23:12:55

Complete all the Command Center side-missions on Omega.

Unlocked: 11 Mar 2013 02:05:54

Free Omega from Cerberus Occupation.

Unlocked: 28 Nov 2012 03:35:45

Find the Talon leader.

Unlocked: 27 Nov 2012 21:36:43

Use clues to pinpoint the exact location of an objective.

Unlocked: 17 Nov 2012 09:57:42

Kill 5,000 enemies.

Unlocked: 17 Nov 2012 00:28:29

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

Unlocked: 16 Nov 2012 04:39:42

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

Unlocked: 16 Nov 2012 04:38:52

Rescue a civilian from Reaper forces.

Unlocked: 15 Nov 2012 06:20:42

Investigate a sinister conspiracy.

Unlocked: 15 Nov 2012 05:25:08

Perform any combination of 50 biotic combos or tech bursts.

Unlocked: 28 Jun 2012 01:04:56

Upgrade any weapon to level 10.

Unlocked: 27 Jun 2012 23:50:24

Hijack an Atlas mech.

Unlocked: 26 Jun 2012 23:06:18

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

Unlocked: 26 Jun 2012 22:50:53

Set 100 enemies on fire with powers.

Unlocked: 04 Apr 2012 02:05:22

Lift 100 enemies off the ground with powers.

Unlocked: 12 Mar 2012 21:26:47

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

Unlocked: 12 Mar 2012 21:14:14

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

Unlocked: 12 Mar 2012 21:14:13

Send a warning across the galaxy.

Unlocked: 10 Mar 2012 10:39:45

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

Unlocked: 10 Mar 2012 10:06:45

Extract ancient technology.

Unlocked: 10 Mar 2012 09:35:03

Call down an orbital strike.

Unlocked: 10 Mar 2012 07:44:01

Kill 1,000 enemies.

Unlocked: 10 Mar 2012 07:26:34

Disable a group of fighter squadrons.

Unlocked: 10 Mar 2012 06:52:02

Complete three multiplayer matches or five N7 missions.

Unlocked: 10 Mar 2012 05:52:45

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

Unlocked: 10 Mar 2012 05:45:12

Sabotage a dreadnought.

Unlocked: 10 Mar 2012 05:26:03

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

Unlocked: 10 Mar 2012 03:56:04

Evacuate a scientific facility.

Unlocked: 10 Mar 2012 03:38:09

Establish or rekindle a romantic relationship.

Unlocked: 10 Mar 2012 00:31:50

Discover an enemy's monstrous origin.

Unlocked: 10 Mar 2012 00:06:21

Win a political stand-off.

Unlocked: 08 Mar 2012 12:24:50

Explore a lost city.

Unlocked: 08 Mar 2012 03:53:34

Kill 100 enemies with melee attacks.

Unlocked: 08 Mar 2012 03:33:56

Overload the shields of 100 enemies.

Unlocked: 08 Mar 2012 02:34:14

Survive the swarm.

Unlocked: 08 Mar 2012 01:59:33

Defeat a harvester.

Unlocked: 07 Mar 2012 23:05:36

Complete one multiplayer match or two N7 missions.

Unlocked: 07 Mar 2012 22:54:22

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

Unlocked: 07 Mar 2012 22:51:52

Destroy an Atlas dropped from orbit.

Unlocked: 07 Mar 2012 21:57:43

Learn more about the Prothean Empire.

Unlocked: 07 Mar 2012 13:15:14

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

Unlocked: 07 Mar 2012 13:02:55

Stop a Cerberus kidnapping.

Unlocked: 07 Mar 2012 12:31:06

Kill 250 enemies.

Unlocked: 07 Mar 2012 12:14:10

Escape a Reaper in the galaxy map.

Unlocked: 07 Mar 2012 04:13:18

Bring a veteran officer aboard.

Unlocked: 07 Mar 2012 02:17:49

Kill a brute while it's charging you.

Unlocked: 07 Mar 2012 02:12:30

Modify a weapon.

Unlocked: 07 Mar 2012 00:34:48

Visit a store in the single-player campaign.

Unlocked: 07 Mar 2012 00:14:18

Chase down an assassin.

Unlocked: 07 Mar 2012 00:04:34

Return to active duty.

Unlocked: 06 Mar 2012 23:06:51

Evolve any of your powers to rank 6.

Unlocked: 06 Mar 2012 22:43:12

Defeat an old adversary.

Unlocked: Offline

Make the final assault.

Unlocked: Offline

Mission accomplished.

Unlocked: Offline

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

Unlocked: Offline

Obtain two non-customizable suits of armor.

Unlocked: Offline

Uncover an ancient secret.

Unlocked: Offline