Modify a soldier.
Fulfill a Council request.
Uncover the alien base's location.
Stun an Outsider.
Gain access to the lowest level in your base.
Build a Laboratory.
Capture a live alien.
Shoot down a UFO.
Launch a Satellite.
Complete a mission without losing a soldier.
Complete the tutorial mission.
You Win, Everything.
Augment a soldier.
Get a Soldier to have 5 modifications.
Deploy three tactical subsystems on a single soldier.
Deal with the newest global threat.
Eliminate all alien waves.
Eradicate the infestation.
Kill a Muton Berserker in melee combat.
Make certain of the new threat's location.
Field a squad consisting entirely of augmented soldiers and SHIVs (min. 4) and win the mission.
Kill an enemy as it is psionically attacking you.
Kill an unseen enemy detected by a specially modified soldier.
Cause an enemy to suicide.
Beat a new special mission without losing any assets.
Designate a highly decorated soldier as the Volunteer.
Beat the game in Ironman mode on Classic or Impossible difficulty.
Mind Control an Ethereal.
Beat the game on any 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.
Kill 150 aliens.
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.
Find a soldier with the Gift.
Build the Gollop Chamber.
Get satellite coverage over every country on one continent.
In a single game, shoot down one of each alien craft.
Advance one of your soldiers to Colonel rank.
Acquire 1000 credits in one month.
In a single game, complete every Foundry project.
Build a Workshop.
Complete a Very Difficult abduction mission in five turns or less on Classic or Impossible difficulty.
Recover the Hyperwave Beacon.
Make contact with the Ethereal hive mind.
Win a mission with an all-female squad.
