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68 of 85 (80%) achievements earned:
Personal Achievements
 

Meet New People. Then Kill Them.

Win a multiplayer match.
Unlocked Oct 12, 2012 @ 2:56pm

Xavier

Mind Control an Ethereal. Single player only.
Unlocked Oct 30, 2012 @ 2:33pm

Humanity's Savior

Beat the game on any difficulty.
Unlocked Oct 15, 2012 @ 3:45pm

Earth First

Beat the game on Classic difficulty.
Unlocked Jul 9, 2013 @ 11:41am

Lone Wolf

Clear a UFO crash site with one soldier on Classic or Impossible difficulty.
Unlocked Nov 13, 2013 @ 5:32am

Bada Boom

Kill 50 aliens with explosive weapons.
Unlocked Oct 23, 2012 @ 5:38pm

Welcoming Committee

Kill 150 aliens.
Unlocked Oct 12, 2012 @ 10:30am

Pale Horse

Kill 500 aliens.
Unlocked Oct 13, 2012 @ 7:03pm

Shooting Stars

Shoot down 40 UFOs.
Unlocked Sep 13, 2013 @ 12:34pm

Ain't No Cavalry Comin'

Have a soldier survive every mission in a full game.
Unlocked Nov 13, 2013 @ 2:38pm

As A Scalpel

Earn the "Excellent" rating in every performance category on a terror mission.
Unlocked Oct 13, 2012 @ 11:16am

Edison

In a single game, complete every Research Project.
Unlocked Oct 31, 2012 @ 5:22pm

Angel of Death

Kill an alien while flying. Single player only.
Unlocked Oct 14, 2012 @ 7:37pm

All Employees Must Wash Hands…

In a single game, complete every Autopsy.
Unlocked Oct 15, 2012 @ 11:45am

Beyond the Veil

Find a soldier with the Gift.
Unlocked Oct 14, 2012 @ 7:23pm

Prisoner of War

Capture a live alien.
Unlocked Oct 11, 2012 @ 8:42pm

The Gatekeeper

Stun an Outsider.
Unlocked Oct 12, 2012 @ 4:53am

X Marks the Spot

Uncover the alien base's location.
Unlocked Oct 12, 2012 @ 8:53am

See All, Know All

Build the Hyperwave Relay.
Unlocked Oct 12, 2012 @ 5:58pm

On the Shoulders of Giants

Build the Gollop Chamber.
Unlocked Oct 15, 2012 @ 12:38pm

Ride the Lightning

Build a Firestorm.
Unlocked Oct 14, 2012 @ 8:17pm

Eye in the Sky

Launch a Satellite.
Unlocked Oct 11, 2012 @ 5:28pm

All Together Now

Get satellite coverage over every country on one continent.
Unlocked Oct 14, 2012 @ 8:51am

Hunter/Killer

In a single game, shoot down one of each alien craft.
Unlocked Oct 30, 2012 @ 2:55pm

Man No More

Build a suit of powered armor.
Unlocked Oct 14, 2012 @ 9:15am

Bubonic

Play a multiplayer match against someone with this achievement.
Unlocked Oct 15, 2012 @ 4:06pm

We Happy Few

Complete a mission without losing a soldier.
Unlocked Oct 11, 2012 @ 4:47pm

The Hardest Road

Advance one of your soldiers to Colonel rank.
Unlocked Oct 12, 2012 @ 5:52pm

Worth Every Penny

Acquire 1000 credits in one month.
Unlocked Oct 14, 2012 @ 8:14pm

Oppenheimer

Staff the Research Labs with 80 scientists.
Unlocked Oct 27, 2012 @ 9:27am

One Gun at a Time

Staff the Engineering Department with 80 engineers.
Unlocked Oct 14, 2012 @ 8:14pm

Skunkworks

In a single game, complete every Foundry project.
Unlocked Oct 14, 2012 @ 8:17pm

You Have 5 Seconds to Comply

Build a S.H.I.V.
Unlocked Oct 14, 2012 @ 8:49am

Theory...

Build a Laboratory.
Unlocked Oct 11, 2012 @ 8:04pm

...and Practice.

Build a Workshop.
Unlocked Oct 11, 2012 @ 8:09pm

What Wonders Await

Complete a Research Project.
Unlocked Oct 11, 2012 @ 4:50pm

Up and Running

Build a base facility.
Unlocked Oct 11, 2012 @ 5:57pm

Combat Ready

Build an item.
Unlocked Oct 11, 2012 @ 4:52pm

Drums in the Deep

Gain access to the lowest level in your base.
Unlocked Oct 14, 2012 @ 8:14pm

Happy to Oblige

Fulfill a Council request.
Unlocked Oct 11, 2012 @ 8:08pm

And Hell's Coming With Me

Successfully assault an Overseer UFO.
Unlocked Oct 15, 2012 @ 11:40am

Off My Planet

Recover the Hyperwave Beacon.
Unlocked Oct 12, 2012 @ 4:52pm

Tables Turned

Shoot down a UFO.
Unlocked Oct 11, 2012 @ 5:35pm

And So It Begins…

Complete the tutorial mission.
Unlocked Oct 11, 2012 @ 4:33pm

The Volunteer

Make contact with the Ethereal hive mind.
Unlocked Oct 15, 2012 @ 12:42pm

Flight of the Valkyries

Win a mission with an all-female squad. Single player only.
Unlocked Oct 14, 2012 @ 2:05pm

New Friend

Complete Friends in Low Places.
Unlocked Jun 25, 2013 @ 8:31am

Bait the Hook

Complete Confounding Light.
Unlocked Jul 3, 2013 @ 8:34am

The Bigger They Are

Complete Gangplank.
Unlocked Aug 31, 2013 @ 6:33am

Rising Dragon

Take your new ally into the final challenge.
Unlocked Nov 7, 2013 @ 2:47pm

All Aboard

Complete Confounding Light with more than 3 turns left on the timer.
Unlocked Aug 30, 2013 @ 2:51pm

Who Needs Limbs?

Augment a soldier in single player
Unlocked Nov 15, 2013 @ 7:45am

A Little Bit Alien

Modify a soldier in single player
Unlocked Nov 15, 2013 @ 7:44am

Apotheosis Denied

Deal with the newest global threat
Unlocked Nov 21, 2013 @ 10:24am

Zom-B-Gone

Eradicate the infestation
Unlocked Nov 16, 2013 @ 1:47pm

Shieldbuster

Eliminate an enemy's shield and kill it on the same turn in single player
Unlocked Nov 16, 2013 @ 11:31am

Someone Your Own Size

Kill a Muton Berserker in melee combat in single player
Unlocked Nov 16, 2013 @ 2:30pm

Taking A Load Off

Stop a squad member from suffocating in single player
Unlocked Nov 15, 2013 @ 9:44am

Where in the World

Make certain of the new threat's location
Unlocked Nov 19, 2013 @ 4:59am

Mind the Step

Jump two stories in one move in single player
Unlocked Nov 16, 2013 @ 10:34am

Nice Cover

Use Collateral Damage to blow up a car in single player
Unlocked Nov 16, 2013 @ 6:22am

Anger Management

Proc Combat Rush on the entire squad (min. 4)
Unlocked Nov 19, 2013 @ 4:26am

Remington… Max Remington

Have your special-duty soldier kill three enemies in the same mission
Unlocked Nov 17, 2013 @ 12:17pm

G’day

Kill an elite enemy Sniper with one of your own snipers in single player
Unlocked Nov 17, 2013 @ 12:07pm

Regenerate This

Kill an elite enemy Medic with explosive damage in single player
Unlocked Nov 17, 2013 @ 12:20pm

Pain in the Neck

Cause an enemy to suicide
Unlocked Nov 19, 2013 @ 7:20am

Elite Defense

Beat a new special mission without losing any assets
Unlocked Nov 16, 2013 @ 9:57am

All Hands on Deck

Get at least 4 kills with XCOM Base Security personnel
Unlocked Nov 21, 2013 @ 10:53am



No Looking Back

Beat the game in Ironman mode on Classic or Impossible Difficulty.

Our Finest Hour

Beat the game on Impossible difficulty.

Wet Work

Complete a Very Hard abduction mission in five turns or less on Classic or Impossible difficulty.

A Continental Fellow

Win the game from each of the 5 starting locations.

Enemy Within

Get a Soldier to have 5 modifications in single player

Steel Martyr

Deploy three tactical subsystems on a single soldier in single player

They Shall Not Pass

Eliminate all alien waves

An Army Of Four

Beat the game without buying a Squad Size upgrade (Classic+ difficulty)

The Meld Squad

Field a fully enhanced squad and win the mission

By Our Powers Combined

Field a squad with 4 augmented soldiers, each with a different base ability and win the mission

Rise of the Machines

Field a squad consisting entirely of augmented soldiers and SHIVs (min. 4) and win the mission

Mutatis Mutandis

Field a squad where all members have at least two modifications (min. 4) and win the mission

Mental Minefield

Kill an enemy as it is psionically attacking you in single player

Tingling Sensation

Kill an unseen enemy detected by a specially modified soldier in single player

Solid Prospect

Complete Deluge

Ours are the Furies

Complete Furies

Guardian of Earth

Designate a highly decorated soldier as the Volunteer