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