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.
Finish the game on Insanity without changing difficulty after leaving Earth.
Finish all multiplayer maps on Gold or all single-player missions on Insanity.
Deliver most of the Galaxy at War assets to the final conflict.
Kill 5,000 enemies.
Lift 100 enemies off the ground with powers.
Hijack an Atlas mech.
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.
Complete Mass Effect 3 twice, or once with a Mass Effect 2 import.
Mission accomplished.
Make the final assault.
Kill a brute while it's charging you.
Attain the highest level of readiness in each theater of war.
Perform any combination of 50 biotic combos or tech bursts.
Kill 100 enemies with melee attacks.
Defeat an old adversary.
Finish all multiplayer maps or all N7 missions in single-player.
Send a warning across the galaxy.
Kill 1,000 enemies.
Extract ancient technology.
Complete three multiplayer matches or five N7 missions.
Reach level 15 in multiplayer or level 50 in single-player.
Evacuate a scientific facility.
Establish or rekindle a romantic relationship.
Discover an enemy's monstrous origin.
Set 100 enemies on fire with powers.
Dispatch 10 probes to retrieve people or resources in Reaper territory.
Overload the shields of 100 enemies.
Obtain two non-customizable suits of armor.
Call down an orbital strike.
Disable a group of fighter squadrons.
Sabotage a dreadnought.
Win a political stand-off.
Explore a lost city.
Defeat a harvester.
Complete one multiplayer match or two N7 missions.
Survive the swarm.
Destroy an Atlas dropped from orbit.
Escape a Reaper in the galaxy map.
Kill 10 guardians with headshots from the front while their shields are raised.
Kill 250 enemies.
Stop a Cerberus kidnapping.
Bring a veteran officer aboard.
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.
Start a character in multiplayer or customize a character in single-player.
Learn more about the Prothean Empire.
Find all required intel to help Eden Prime's colonists.
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.
Complete all the Command Center side-missions on Omega.
Find the Talon leader.
Win a prize at one of the arcade games.
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.
Throw a party for your friends.
Investigate a strange occurrence in the combat simulator.
Score 9999 points in the combat simulator on Normal, Hardcore, or Insanity.
Defeat a group of Spectre-level opponents on Normal, Hardcore, or Insanity.