Kill 50 aliens with explosive weapons.
Beat the game on any difficulty.
Kill 500 aliens.
Staff the Research Labs with 80 scientists.
Staff the Engineering Department with 80 engineers
In a single game, complete every Autopsy.
Build a suit of powered armor.
Acquire 1000 credits in one month.
Get satellite coverage over every country on one continent.
Build a S.H.I.V.
Build a Workshop.
Kill 150 aliens.
Advance one of your soldiers to Colonel rank.
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.
Beat the game in Ironman mode on Classic or Impossible difficulty.
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.
In a single game, shoot down one of each alien craft.
In a single game, complete every Foundry project.
Complete 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.
Gain access to the lowest level in your base.
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.
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