Acquire 1000 credits in one month.
Build a S.H.I.V
Kill 50 aliens with explosive weapons.
Earn the "Excellent" rating in every performance category on a terror mission.
Kill 150 aliens.
Advance one of your soldiers to Colonel rank.
Build a suit of powered armor.
Get satellite coverage over every country on one continent.
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.
Complete a mission without losing a soldier.
Build an item.
Complete a Research Project.
Complete the tutorial mission.
Gain all trophies.
Beat the game in Ironman mode on Classic or Impossible difficulty.
Kill 500 aliens.
Shoot down 40 UFOs.
Have a soldier survive every mission in a full game.
In a single game, complete every Research Project.
In a single game, complete every Autopsy.
In a single game, shoot down one of each alien craft.
Staff the Research Labs with 80 scientists.
Staff the Engineering Department with 80 engineers.
In a single game, complete every Foundry project.
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.
Beat the game on any difficulty.
Beat the game on Classic difficulty.
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.
Beat the game on Impossible difficulty.
Clear a UFO crash site with one soldier on Classic or Impossible difficulty.
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