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55 of 85 (65%) achievements earned:
Personal Achievements
 

No Looking Back

Beat the game in Ironman mode on Classic or Impossible Difficulty.
Unlocked 16 Nov, 2013 @ 12:36pm

Humanity's Savior

Beat the game on any difficulty.
Unlocked 16 Nov, 2013 @ 12:36pm

Earth First

Beat the game on Classic difficulty.
Unlocked 16 Nov, 2013 @ 12:36pm

Lone Wolf

Clear a UFO crash site with one soldier on Classic or Impossible difficulty.
Unlocked 24 Nov, 2013 @ 4:23am

Bada Boom

Kill 50 aliens with explosive weapons.
Unlocked 23 Oct, 2012 @ 10:39pm

Welcoming Committee

Kill 150 aliens.
Unlocked 20 Oct, 2012 @ 1:07pm

Pale Horse

Kill 500 aliens.
Unlocked 15 Nov, 2013 @ 7:29am

As A Scalpel

Earn the "Excellent" rating in every performance category on a terror mission.
Unlocked 21 Oct, 2012 @ 12:27am

Angel of Death

Kill an alien while flying. Single player only.
Unlocked 16 Nov, 2013 @ 11:14am

All Employees Must Wash Hands…

In a single game, complete every Autopsy.
Unlocked 16 Nov, 2013 @ 9:20am

Beyond the Veil

Find a soldier with the Gift.
Unlocked 21 Oct, 2012 @ 10:35am

Prisoner of War

Capture a live alien.
Unlocked 21 Oct, 2012 @ 1:14am

The Gatekeeper

Stun an Outsider.
Unlocked 21 Oct, 2012 @ 2:32am

X Marks the Spot

Uncover the alien base's location.
Unlocked 21 Oct, 2012 @ 4:32am

See All, Know All

Build the Hyperwave Relay.
Unlocked 15 Nov, 2013 @ 7:51am

On the Shoulders of Giants

Build the Gollop Chamber.
Unlocked 16 Nov, 2013 @ 11:14am

Ride the Lightning

Build a Firestorm.
Unlocked 15 Nov, 2013 @ 8:32am

Eye in the Sky

Launch a Satellite.
Unlocked 20 Oct, 2012 @ 12:58pm

All Together Now

Get satellite coverage over every country on one continent.
Unlocked 20 Oct, 2012 @ 12:58pm

Man No More

Build a suit of powered armor.
Unlocked 21 Oct, 2012 @ 6:33am

Bubonic

Play a multiplayer match against someone with this achievement.
Unlocked 22 Oct, 2012 @ 8:27am

We Happy Few

Complete a mission without losing a soldier.
Unlocked 20 Oct, 2012 @ 12:50pm

The Hardest Road

Advance one of your soldiers to Colonel rank.
Unlocked 21 Oct, 2012 @ 2:33am

Worth Every Penny

Acquire 1000 credits in one month.
Unlocked 15 Nov, 2013 @ 6:25am

Theory...

Build a Laboratory.
Unlocked 21 Oct, 2012 @ 5:12am

Wet Work

Complete a Very Hard abduction mission in five turns or less on Classic or Impossible difficulty.
Unlocked 13 Nov, 2013 @ 9:54pm

What Wonders Await

Complete a Research Project.
Unlocked 20 Oct, 2012 @ 12:58pm

Up and Running

Build a base facility.
Unlocked 20 Oct, 2012 @ 12:59pm

Combat Ready

Build an item.
Unlocked 20 Oct, 2012 @ 12:59pm

Drums in the Deep

Gain access to the lowest level in your base.
Unlocked 23 Nov, 2013 @ 9:04am

Happy to Oblige

Fulfill a Council request.
Unlocked 21 Oct, 2012 @ 12:15am

And Hell's Coming With Me

Successfully assault an Overseer UFO.
Unlocked 16 Nov, 2013 @ 9:17am

Off My Planet

Recover the Hyperwave Beacon.
Unlocked 21 Oct, 2012 @ 5:09am

Tables Turned

Shoot down a UFO.
Unlocked 20 Oct, 2012 @ 1:00pm

And So It Begins…

Complete the tutorial mission.
Unlocked 7 Feb, 2013 @ 12:13am

The Volunteer

Make contact with the Ethereal hive mind.
Unlocked 16 Nov, 2013 @ 11:25am

Flight of the Valkyries

Win a mission with an all-female squad. Single player only.
Unlocked 24 Nov, 2013 @ 4:23am

New Friend

Complete Friends in Low Places.
Unlocked 20 Nov, 2013 @ 11:13am

Bait the Hook

Complete Confounding Light.
Unlocked 22 Nov, 2013 @ 2:51am

The Bigger They Are

Complete Gangplank.
Unlocked 22 Nov, 2013 @ 3:30am

Who Needs Limbs?

Augment a soldier in single player
Unlocked 17 Nov, 2013 @ 7:06am

A Little Bit Alien

Modify a soldier in single player
Unlocked 22 Nov, 2013 @ 6:29am

Steel Martyr

Deploy three tactical subsystems on a single soldier in single player
Unlocked 23 Nov, 2013 @ 4:30pm

Apotheosis Denied

Deal with the newest global threat
Unlocked 24 Nov, 2013 @ 3:44am

Zom-B-Gone

Eradicate the infestation
Unlocked 22 Nov, 2013 @ 1:52am

Shieldbuster

Eliminate an enemy's shield and kill it on the same turn in single player
Unlocked 22 Nov, 2013 @ 4:56am

Someone Your Own Size

Kill a Muton Berserker in melee combat in single player
Unlocked 23 Nov, 2013 @ 4:25pm

Taking A Load Off

Stop a squad member from suffocating in single player
Unlocked 20 Nov, 2013 @ 7:59am

Where in the World

Make certain of the new threat's location
Unlocked 24 Nov, 2013 @ 3:28am

Nice Cover

Use Collateral Damage to blow up a car in single player
Unlocked 17 Nov, 2013 @ 7:15am

Remington… Max Remington

Have your special-duty soldier kill three enemies in the same mission
Unlocked 22 Nov, 2013 @ 6:47am

G’day

Kill an elite enemy Sniper with one of your own snipers in single player
Unlocked 23 Nov, 2013 @ 7:02am

Regenerate This

Kill an elite enemy Medic with explosive damage in single player
Unlocked 23 Nov, 2013 @ 6:39am

Pain in the Neck

Cause an enemy to suicide
Unlocked 23 Nov, 2013 @ 4:50pm

Elite Defense

Beat a new special mission without losing any assets
Unlocked 22 Nov, 2013 @ 6:56am



Meet New People. Then Kill Them.

Win a multiplayer match.

Xavier

Mind Control an Ethereal. Single player only.

Our Finest Hour

Beat the game on 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.

One Gun at a Time

Staff the Engineering Department with 80 engineers.

Skunkworks

In a single game, complete every Foundry project.

You Have 5 Seconds to Comply

Build a S.H.I.V.

...and Practice.

Build a Workshop.

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

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

Mind the Step

Jump two stories in one move 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

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

Anger Management

Proc Combat Rush on the entire squad (min. 4)

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

All Hands on Deck

Get at least 4 kills with XCOM Base Security personnel
+2

2 hidden achievements remaining

Details for each achievement will be revealed once unlocked