Mass Effect 3 Achievements

A Personal Touch
Modify a weapon.
Almost There
Reach Level 15 in multiplayer or level 50 in single-player
Always Prepared
Obtain two noncustomizable suits of armor.
Arbiter
Win a political standoff
Battle-Scarred
Promote a multiplayer character to the Galaxy at War or import an ME3 character.
Bringer of War
Chase down an assassin.
Bruiser
Kill 100 enemies with melee attacks.
Combined Arms
Perform any combinations of 50 biotic combos or tech bursts.
Defender
Attain the highest level of readiness in each theater of war.
Driven
Return to active duty
Enlisted
Start a character in multiplayer or customize a character in single-player.
Executioner
Defeat an old adversary.
Explorer
Complete three multiplayer matches or five N7 missions.
Eye of the Hurricane
Kill a brute while it's charging you.
Fact Finder
Discover an enemy's monstrous origin.
Focused
Evolve any of your powers to rank 6.
Giant Killer
Defeat a Harvester
Gunsmith
Upgrade any weapon to level 10.
Hard Target
Call down an orbital strike.
Hijacker
Hijack an Atlas mech.
Insanity
Finish the game on Insanity without changing difficulty after leaving Earth.
Last Witness
Extract ancient technology
Legend
Mission accomplished.
Liberator
Stop a Cerberus kidnapping
Long Service Medal
Complete Mass Effect 3 twice or once with a Mass Effect 2 import.
Lost and Found
Dispatch 10 probes to retrieve people or resources in Reaper territory.
Mail Slot
Kill 10 guardians with headshots from the front while their shields are raised.
Master and Commander
Deliver most of the Galaxy at War assets to the final conflict
Mobilizer
Bring a veteran officer aboard.
Overload Specialist
Overload the shields of 100 enemies.
Paramour
Establish or rekindle a romantic relationship.
Party Crasher
Sabotage a dreadnought.
Pathfinder
Explore a lost city.
Patriot
Make the final assault.
Peak Condition
Reach Level 20 in multiplayer or level 60 in single-player.
Problem Solver
Evacuate a scientific facility.
Pyromaniac
Set 100 enemies on fire with powers.
Recruit
Kill 250 enemies.
Saboteur
Disable a group of fighter squadrons.
Shopaholic
Visit a store in the single-player campaign.
Sky High
Lift 100 enemies off the ground with powers.
Soldier
Kill 1,000 enemies.
Tour of Duty
Finish all multiplayer maps or all N7 missions in single-player.
Tourist
Complete one multiplayer match or two N7 missions.
Tunnel Rat
Survive the swarm.
Untouchable
Escape a Reaper in the galaxy map.
Unwavering
Finish all multiplayer maps on Gold or all single-player missions on Insanity.
Veteran
Kill 5,000 enemies.
Well Connected
Send a warning across the galaxy.
World Shaker
Destroy an Atlas dropped from orbit.