No Looking Back
100Beat the game in Ironman mode on Classic or Impossible difficulty.
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Win a multiplayer match.
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Mind Control an Ethereal. Single player only.
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Beat the game on any difficulty.
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Earth First
60Beat the game on Classic difficulty.
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Beat the game on Impossible difficulty.
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Lone Wolf
20Clear a UFO crash site with one soldier on Classic or Impossible difficulty.
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Bada Boom
10Kill 50 aliens with explosive weapons.
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Kill 150 aliens.
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Pale Horse
50Kill 500 aliens.
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Shoot down 40 UFOs.
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Have a soldier survive every mission in a full game.
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As A Scalpel
25Earn the "Excellent" rating in every performance category on a terror mission.
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Edison
25In a single game, complete every Research Project.
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Kill an alien while flying. Single player only.
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In a single game, complete every Autopsy.
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Find a soldier with the Gift.
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Capture a live alien.
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Stun an Outsider.
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Uncover the alien base's location.
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Build the Hyperwave Relay.
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Build the Gollop Chamber.
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Build a Firestorm.
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Launch a Satellite.
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Get satellite coverage over every country on one continent.
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In a single game, shoot down one of each alien craft.
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Man No More
10Build a suit of powered armor.
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Cure poison on five soldiers in a single mission. Single player only.
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We Happy Few
10Complete a mission without losing a soldier.
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Advance one of your soldiers to Colonel rank.
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Acquire 1000 credits in one month.
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Oppenheimer
20Staff the Research Labs with 80 scientists.
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Staff the Engineering Department with 80 engineers
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Skunkworks
20In a single game, complete every Foundry project.
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Build a S.H.I.V.
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Theory...
10Build a Laboratory.
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Build a Workshop.
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Wet Work
10Complete a Very Hard abduction mission in five turns or less on Classic or Impossible difficulty.
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Win the game from each of the 5 starting locations.
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Complete a Research Project.
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Build a base facility.
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Build an item.
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Gain access to the lowest level in your base.
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Fulfill a Council request.
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Successfully assault an Overseer UFO.
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Recover the Hyperwave Beacon.
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Shoot down a UFO.
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Complete the tutorial mission.
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Make contact with the Ethereal hive mind.
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Win a mission with an all-female squad. Single player only.
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New Friend
10Complete Friends in Low Places.
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Complete Confounding Light.
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Complete Gangplank.
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Take your new ally into the final challenge.
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All Aboard
30Complete Confounding Light with more than 3 turns left on the timer.
Unlocked: Offline