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