Win a multiplayer match.
Beat the game on any difficulty.
Make contact with the Ethereal hive mind.
Build the Gollop Chamber.
Find a soldier with the Gift.
In a single game, complete every Autopsy.
Successfully assault an Overseer UFO.
In a single game, shoot down one of each alien craft.
Build the Hyperwave Relay.
In a single game, complete every Foundry project.
Recover the Hyperwave Beacon.
Uncover the alien base's location.
Stun an Outsider.
Capture a live alien.
Kill 500 aliens.
Build a Firestorm.
Staff the Engineering Department with 80 engineers.
Staff the Research Labs with 80 scientists.
Get satellite coverage over every country on one continent.
Win a mission with an all-female squad. Single player only.
Kill an alien while flying. Single player only.
Build a suit of powered armor.
Kill 150 aliens.
Advance one of your soldiers to Colonel rank.
Kill 50 aliens with explosive weapons.
Build a S.H.I.V
Acquire 1000 credits in one month.
Gain access to the lowest level in your base.
Build a Workshop.
Fulfill a Council request.
Build a Laboratory.
Build a base facility.
Shoot down a UFO.
Launch a Satellite.
Build an item.
Complete a Research Project.
Complete a mission without losing a soldier.
Complete the tutorial mission.
Gain all trophies.
Beat the game in Ironman mode on Classic or Impossible difficulty.
Mind Control an Ethereal. Single player only.
Beat the game on Classic difficulty.
Beat the game on Impossible difficulty.
Clear a UFO crash site with one soldier on Classic or Impossible difficulty.
Shoot down 40 UFOs.
Have a soldier survive every mission in a full game.
Earn the "Excellent" rating in every performance category on a terror mission.
In a single game, complete every Research Project.
Cure poison on five soldiers in a single mission. Single player only.
Complete a Very Difficult abduction mission in five turns or less on Classic or Impossible difficulty.
Win the game from each of the 5 starting locations.
Complete Friends in Low Places.
Complete Confounding Light.
Complete Gangplank.
Take your new ally into the final challenge.
Complete Confounding Light with more than 3 turns left on the timer.
