Full list of all 68 Mass Effect 3 achievements worth 1,550 gamerscore. It takes around 50-60 hours to unlock all of the achievements in the base game.
The base game contains 50 achievements worth 1,000 Gamerscore, and there are 4 DLC packs containing 18 achievements worth 550 Gamerscore.
Perform any combination of 50 biotic combos or tech bursts.
Kill 5,000 enemies.
Deliver most of the Galaxy at War assets to the final conflict.
Kill 100 enemies with melee attacks.
Lift 100 enemies off the ground with powers.
Reach level 20 in multiplayer or level 60 in single-player.
Upgrade any weapon to level 10.
Promote a multiplayer character to the Galaxy at War or import an ME3 character.
Survive the swarm.
Explore a lost city.
Kill a brute while it's charging you.
Kill 10 guardians with headshots from the front while their shields are raised.
Defeat a harvester.
Obtain two non-customizable suits of armor.
Complete one multiplayer match or two N7 missions.
Send a warning across the galaxy.
Start a character in multiplayer or customize a character in single-player.
Mission accomplished.
Complete Mass Effect 3 twice, or once with a Mass Effect 2 import.
Make the final assault.
Defeat an old adversary.
Hijack an Atlas mech.
Finish all multiplayer maps or all N7 missions in single-player.
Extract ancient technology.
Kill 1,000 enemies.
Call down an orbital strike.
Disable a group of fighter squadrons.
Reach level 15 in multiplayer or level 50 in single-player.
Complete three multiplayer matches or five N7 missions.
Sabotage a dreadnought.
Establish or rekindle a romantic relationship.
Evacuate a scientific facility.
Discover an enemy's monstrous origin.
Win a political stand-off.
Destroy an Atlas dropped from orbit.
Stop a Cerberus kidnapping.
Kill 250 enemies.
Bring a veteran officer aboard.
Set 100 enemies on fire with powers.
Dispatch 10 probes to retrieve people or resources in Reaper territory.
Escape a Reaper in the galaxy map.
Visit a store in the single-player campaign.
Chase down an assassin.
Modify a weapon.
Evolve any of your powers to rank 6.
Return to active duty.
Finish the game on Insanity without changing difficulty after leaving Earth.
Attain the highest level of readiness in each theater of war.
Overload the shields of 100 enemies.
Finish all multiplayer maps on Gold or all single-player missions on Insanity.
Find all required intel to help Eden Prime's colonists.
Learn more about the Prothean Empire.
Uncover an ancient secret.
Rescue a civilian from Reaper forces.
Investigate a sinister conspiracy.
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.
Investigate a strange occurrence in the combat simulator.
Throw a party for your friends.
Stop an out-of-control scheme before it's too late.
Infiltrate an enemy stronghold with your crew.
Go undercover to follow a lead.
Discover a plot against you.
Win a prize at one of the arcade games.
Score 9999 points in the combat simulator on Normal, Hardcore, or Insanity.
Defeat a group of Spectre-level opponents on Normal, Hardcore, or Insanity.