XCOM: Enemy Unknown/Achievements

Global completion percentages from Steam, rarest first
Achievements
85
Rarest
1.0%
Ultra rare (<5%)
10
Avg. completion
31%

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 Dragonhidden
Hidden achievement — description revealed on unlock.

All Aboardhidden
Hidden achievement — description revealed on unlock.

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 Arehidden
Hidden achievement — description revealed on unlock.

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 Hookhidden
Hidden achievement — description revealed on unlock.

Humanity's Savior
Beat the game on any difficulty.

One Gun at a Time
Staff the Engineering Department with 80 engineers.

The Volunteerhidden
Hidden achievement — description revealed on unlock.

New Friendhidden
Hidden achievement — description revealed on unlock.

Taking A Load Off
Stop a squad member from suffocating in single player

On the Shoulders of Giantshidden
Hidden achievement — description revealed on unlock.

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 Mehidden
Hidden achievement — description revealed on unlock.

Pale Horse
Kill 500 aliens.

Beyond the Veilhidden
Hidden achievement — description revealed on unlock.

See All, Know Allhidden
Hidden achievement — description revealed on unlock.

Drums in the Deep
Gain access to the lowest level in your base.

Ride the Lightninghidden
Hidden achievement — description revealed on unlock.

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 Planethidden
Hidden achievement — description revealed on unlock.

The Hardest Road
Advance one of your soldiers to Colonel rank.

Theory...
Build a Laboratory.

X Marks the Spothidden
Hidden achievement — description revealed on unlock.

Welcoming Committee
Kill 150 aliens.

...and Practice.
Build a Workshop.

The Gatekeeperhidden
Hidden achievement — description revealed on unlock.

Prisoner of Warhidden
Hidden achievement — description revealed on unlock.

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.
Percentages are Steam's global unlock rates across all players who own XCOM: Enemy Unknown, refreshed daily. See live player counts and stats for XCOM: Enemy Unknown.