Extract ancient technology.
Defeat an old adversary.
Send a warning across the galaxy.
Discover an enemy's monstrous origin.
Make the final assault.
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.
Perform any combination of 50 biotic combos or tech bursts.
Kill 5,000 enemies.
Kill 100 enemies with melee attacks.
Attain the highest level of readiness in each theater of war.
Overload the shields of 100 enemies.
Lift 100 enemies off the ground with powers.
Hijack an Atlas mech.
Tour of Duty
Finish all multiplayer maps or all N7 missions in single-player.
Obtain two non-customizable suits of armor.
Complete three multiplayer matches or five N7 missions.
Reach level 20 in multiplayer or level 60 in single-player.
Finish all multiplayer maps on Gold or all single-player missions on Insanity.
No Stone Unturned
Investigate a sinister conspiracy.
Rescue a civilian from Reaper forces.
Uncover an ancient secret.
Use clues to pinpoint the exact location of an objective.
Free Omega from Cerberus occupation.
Find the Talon leader.
Complete all the Command Center side-missions on Omega.
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.