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59 of 85 (69%) achievements earned:
Personal Achievements
 

Meet New People. Then Kill Them.

Win a multiplayer match.
Unlocked 26 Dec, 2012 @ 2:39pm

Xavier

Mind Control an Ethereal. Single player only.
Unlocked 26 Dec, 2015 @ 1:03pm

Humanity's Savior

Beat the game on any difficulty.
Unlocked 31 Dec, 2012 @ 12:12pm

Bada Boom

Kill 50 aliens with explosive weapons.
Unlocked 30 Dec, 2012 @ 12:06am

Welcoming Committee

Kill 150 aliens.
Unlocked 27 Dec, 2012 @ 12:13pm

Pale Horse

Kill 500 aliens.
Unlocked 30 Dec, 2012 @ 10:36pm

As A Scalpel

Earn the "Excellent" rating in every performance category on a terror mission.
Unlocked 30 Dec, 2012 @ 9:05pm

Angel of Death

Kill an alien while flying. Single player only.
Unlocked 30 Dec, 2012 @ 12:03pm

All Employees Must Wash Hands…

In a single game, complete every Autopsy.
Unlocked 30 Dec, 2012 @ 10:44pm

Beyond the Veil

Find a soldier with the Gift.
Unlocked 30 Dec, 2012 @ 10:51am

Prisoner of War

Capture a live alien.
Unlocked 26 Dec, 2012 @ 7:51am

The Gatekeeper

Stun an Outsider.
Unlocked 26 Dec, 2012 @ 10:02am

X Marks the Spot

Uncover the alien base's location.
Unlocked 26 Dec, 2012 @ 1:24pm

See All, Know All

Build the Hyperwave Relay.
Unlocked 30 Dec, 2012 @ 10:33am

On the Shoulders of Giants

Build the Gollop Chamber.
Unlocked 31 Dec, 2012 @ 12:31am

Ride the Lightning

Build a Firestorm.
Unlocked 30 Dec, 2012 @ 7:49pm

Eye in the Sky

Launch a Satellite.
Unlocked 25 Dec, 2012 @ 11:16pm

All Together Now

Get satellite coverage over every country on one continent.
Unlocked 28 Dec, 2012 @ 12:12pm

Man No More

Build a suit of powered armor.
Unlocked 29 Dec, 2012 @ 8:14pm

Bubonic

Play a multiplayer match against someone with this achievement.
Unlocked 31 Dec, 2012 @ 4:11pm

We Happy Few

Complete a mission without losing a soldier.
Unlocked 25 Dec, 2012 @ 10:39pm

The Hardest Road

Advance one of your soldiers to Colonel rank.
Unlocked 27 Dec, 2012 @ 11:00pm

Worth Every Penny

Acquire 1000 credits in one month.
Unlocked 29 Dec, 2012 @ 8:18pm

One Gun at a Time

Staff the Engineering Department with 80 engineers.
Unlocked 30 Dec, 2012 @ 9:12pm

Theory...

Build a Laboratory.
Unlocked 26 Dec, 2012 @ 8:51am

...and Practice.

Build a Workshop.
Unlocked 26 Dec, 2012 @ 4:41pm

What Wonders Await

Complete a Research Project.
Unlocked 25 Dec, 2012 @ 10:41pm

Up and Running

Build a base facility.
Unlocked 26 Dec, 2012 @ 7:43am

Combat Ready

Build an item.
Unlocked 25 Dec, 2012 @ 10:41pm

Drums in the Deep

Gain access to the lowest level in your base.
Unlocked 29 Dec, 2012 @ 10:23pm

Happy to Oblige

Fulfill a Council request.
Unlocked 26 Dec, 2012 @ 10:58am

And Hell's Coming With Me

Successfully assault an Overseer UFO.
Unlocked 30 Dec, 2012 @ 10:36pm

Off My Planet

Recover the Hyperwave Beacon.
Unlocked 29 Dec, 2012 @ 8:05pm

Tables Turned

Shoot down a UFO.
Unlocked 25 Dec, 2012 @ 11:19pm

And So It Begins…

Complete the tutorial mission.
Unlocked 25 Dec, 2012 @ 10:18pm

The Volunteer

Make contact with the Ethereal hive mind.
Unlocked 31 Dec, 2012 @ 12:34am

Flight of the Valkyries

Win a mission with an all-female squad. Single player only.
Unlocked 15 Nov, 2013 @ 10:31pm

Who Needs Limbs?

Augment a soldier in single player
Unlocked 15 Nov, 2013 @ 9:27pm

A Little Bit Alien

Modify a soldier in single player
Unlocked 15 Nov, 2013 @ 9:24pm

Steel Martyr

Deploy three tactical subsystems on a single soldier in single player
Unlocked 18 Nov, 2013 @ 4:18pm

Apotheosis Denied

Deal with the newest global threat
Unlocked 18 Nov, 2013 @ 9:51pm

They Shall Not Pass

Eliminate all alien waves
Unlocked 17 Nov, 2013 @ 7:26pm

Zom-B-Gone

Eradicate the infestation
Unlocked 16 Nov, 2013 @ 9:14pm

The Meld Squad

Field a fully enhanced squad and win the mission
Unlocked 17 Nov, 2013 @ 8:43pm

Shieldbuster

Eliminate an enemy's shield and kill it on the same turn in single player
Unlocked 17 Nov, 2013 @ 5:54pm

Taking A Load Off

Stop a squad member from suffocating in single player
Unlocked 15 Nov, 2013 @ 9:59pm

Where in the World

Make certain of the new threat's location
Unlocked 25 Dec, 2015 @ 7:23pm

Mind the Step

Jump two stories in one move in single player
Unlocked 18 Oct, 2014 @ 9:46am

Nice Cover

Use Collateral Damage to blow up a car in single player
Unlocked 18 Nov, 2013 @ 7:19pm

Mutatis Mutandis

Field a squad where all members have at least two modifications (min. 4) and win the mission
Unlocked 13 Feb, 2014 @ 8:13pm

Anger Management

Proc Combat Rush on the entire squad (min. 4)
Unlocked 16 Nov, 2013 @ 9:32pm

Remington… Max Remington

Have your special-duty soldier kill three enemies in the same mission
Unlocked 16 Nov, 2013 @ 10:30pm

G’day

Kill an elite enemy Sniper with one of your own snipers in single player
Unlocked 17 Nov, 2013 @ 5:29pm

Regenerate This

Kill an elite enemy Medic with explosive damage in single player
Unlocked 17 Nov, 2013 @ 5:37pm

Pain in the Neck

Cause an enemy to suicide
Unlocked 16 Nov, 2013 @ 5:42pm

Solid Prospect

Complete Deluge
Unlocked 17 Nov, 2013 @ 9:56pm

Ours are the Furies

Complete Furies
Unlocked 18 Nov, 2013 @ 4:57pm

Elite Defense

Beat a new special mission without losing any assets
Unlocked 16 Nov, 2013 @ 10:31pm

All Hands on Deck

Get at least 4 kills with XCOM Base Security personnel
Unlocked 17 Nov, 2013 @ 6:47pm



No Looking Back

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

Earth First

Beat the game on Classic difficulty.

Our Finest Hour

Beat the game on Impossible difficulty.

Lone Wolf

Clear a UFO crash site with one soldier on Classic or Impossible difficulty.

Shooting Stars

Shoot down 40 UFOs.

Ain't No Cavalry Comin'

Have a soldier survive every mission in a full game.

Edison

In a single game, complete every Research Project.

Hunter/Killer

In a single game, shoot down one of each alien craft.

Oppenheimer

Staff the Research Labs with 80 scientists.

Skunkworks

In a single game, complete every Foundry project.

You Have 5 Seconds to Comply

Build a S.H.I.V.

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

An Army Of Four

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

Someone Your Own Size

Kill a Muton Berserker in melee combat in single player

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

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

Guardian of Earth

Designate a highly decorated soldier as the Volunteer
+5

5 hidden achievements remaining

Details for each achievement will be revealed once unlocked