XCOM: Enemy Unknown

A Continental Fellow

Win the game from each of the 5 starting locations.

An Army Of Four

Beat the game without buying a Squad Size upgrade (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.

No Looking Back

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

Ain't No Cavalry Comin'

Have a soldier survive every mission in a full game.

By Our Powers Combined

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

Guardian of Earth

Designate a highly decorated soldier as the Volunteer

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

Earth First

Beat the game on Classic difficulty.

Tingling Sensation

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

Xavier

Mind Control an Ethereal. Single player only.

Bubonic

Play a multiplayer match against someone with this achievement.

Wet Work

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

Meet New People. Then Kill Them.

Win a multiplayer match.

Edison

In a single game, complete every Research Project.

Shooting Stars

Shoot down 40 UFOs.

Rising Dragon

All Aboard

Anger Management

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

The Meld Squad

Field a fully enhanced squad and win the mission

Someone Your Own Size

Kill a Muton Berserker in melee combat in single player

Remington… Max Remington

Have your special-duty soldier kill three enemies in the same mission

Nice Cover

Use Collateral Damage to blow up a car in single player

Skunkworks

In a single game, complete every Foundry project.

Enemy Within

Get a Soldier to have 5 modifications in single player

Mind the Step

Jump two stories in one move in single player

Where in the World

Make certain of the new threat's location

Pain in the Neck

Cause an enemy to suicide

Hunter/Killer

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

Ours are the Furies

Complete Furies

Steel Martyr

Deploy three tactical subsystems on a single soldier in single player

Apotheosis Denied

Deal with the newest global threat

Regenerate This

Kill an elite enemy Medic with explosive damage in single player

Solid Prospect

Complete Deluge

All Hands on Deck

Get at least 4 kills with XCOM Base Security personnel

Angel of Death

Kill an alien while flying. Single player only.

They Shall Not Pass

Eliminate all alien waves

G’day

Kill an elite enemy Sniper with one of your own snipers in single player

Shieldbuster

Eliminate an enemy's shield and kill it on the same turn in single player

Zom-B-Gone

Eradicate the infestation

Elite Defense

Beat a new special mission without losing any assets

Flight of the Valkyries

Win a mission with an all-female squad. Single player only.

The Bigger They Are

Who Needs Limbs?

Augment a soldier in single player

A Little Bit Alien

Modify a soldier in single player

Oppenheimer

Staff the Research Labs with 80 scientists.

Bait the Hook

Humanity's Savior

Beat the game on any difficulty.

One Gun at a Time

Staff the Engineering Department with 80 engineers.

The Volunteer

New Friend

Taking A Load Off

Stop a squad member from suffocating in single player

On the Shoulders of Giants

Bada Boom

Kill 50 aliens with explosive weapons.

You Have 5 Seconds to Comply

Build a S.H.I.V.

All Employees Must Wash Hands…

In a single game, complete every Autopsy.

And Hell's Coming With Me

Pale Horse

Kill 500 aliens.

Beyond the Veil

See All, Know All

Drums in the Deep

Gain access to the lowest level in your base.

Ride the Lightning

Worth Every Penny

Acquire 1000 credits in one month.

Man No More

Build a suit of powered armor.

All Together Now

Get satellite coverage over every country on one continent.

As A Scalpel

Earn the "Excellent" rating in every performance category on a terror mission.

Off My Planet

The Hardest Road

Advance one of your soldiers to Colonel rank.

Theory...

Build a Laboratory.

X Marks the Spot

Welcoming Committee

Kill 150 aliens.

...and Practice.

Build a Workshop.

The Gatekeeper

Prisoner of War

Happy to Oblige

Fulfill a Council request.

Up and Running

Build a base facility.

Tables Turned

Shoot down a UFO.

Eye in the Sky

Launch a Satellite.

And So It Begins…

Complete the tutorial mission.

What Wonders Await

Complete a Research Project.

Combat Ready

Build an item.

We Happy Few

Complete a mission without losing a soldier.