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Complete a mission without losing a soldier.
Complete a Research Project.
Build an item.
Complete the tutorial mission.
Launch a Satellite.
Shoot down a UFO.
Build a base facility.
Fulfill a Council request.
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Build a Workshop.
Kill 150 aliens.
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Build a Laboratory.
Advance one of your soldiers to Colonel rank.
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Earn the "Excellent" rating in every performance category on a terror mission.
Get satellite coverage over every country on one continent.
Build a suit of powered armor.
Acquire 1000 credits in one month.
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Gain access to the lowest level in your base.
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Kill 500 aliens.
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In a single game, complete every Autopsy.
Build a S.H.I.V.
Kill 50 aliens with explosive weapons.
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Stop a squad member from suffocating in single player
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Staff the Engineering Department with 80 engineers.
Beat the game on any difficulty.
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Staff the Research Labs with 80 scientists.
Augment a soldier in single player
Modify a soldier in single player
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Win a mission with an all-female squad. Single player only.
Beat a new special mission without losing any assets
Eradicate the infestation
Eliminate an enemy's shield and kill it on the same turn in single player
Kill an elite enemy Sniper with one of your own snipers in single player
Eliminate all alien waves
Kill an alien while flying. Single player only.
Get at least 4 kills with XCOM Base Security personnel
Complete Deluge
Kill an elite enemy Medic with explosive damage in single player
Deal with the newest global threat
Deploy three tactical subsystems on a single soldier in single player
Complete Furies
In a single game, shoot down one of each alien craft.
Cause an enemy to suicide
Make certain of the new threat's location
Jump two stories in one move in single player
Get a Soldier to have 5 modifications in single player
In a single game, complete every Foundry project.
Use Collateral Damage to blow up a car in single player
Have your special-duty soldier kill three enemies in the same mission
Kill a Muton Berserker in melee combat in single player
Field a fully enhanced squad and win the mission
Proc Combat Rush on the entire squad (min. 4)
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Shoot down 40 UFOs.
In a single game, complete every Research Project.
Win a multiplayer match.
Complete a Very Hard abduction mission in five turns or less on Classic or Impossible difficulty.
Mind Control an Ethereal. Single player only.
Play a multiplayer match against someone with this achievement.
Beat the game on Classic difficulty.
Kill an unseen enemy detected by a specially modified soldier in single player
Kill an enemy as it is psionically attacking you in single player
Field a squad where all members have at least two modifications (min. 4) and win the mission
Field a squad consisting entirely of augmented soldiers and SHIVs (min. 4) and win the mission
Designate a highly decorated soldier as the Volunteer
Field a squad with 4 augmented soldiers, each with a different base ability and win the mission
Have a soldier survive every mission in a full game.
Beat the game in Ironman mode on Classic or Impossible Difficulty.
Clear a UFO crash site with one soldier on Classic or Impossible difficulty.
Beat the game on Impossible difficulty.
Beat the game without buying a Squad Size upgrade (Classic+ difficulty)
Win the game from each of the 5 starting locations.