Advance one of your soldiers to Colonel rank.

In a single game, shoot down one of each alien craft.

Launch a Satellite.

Uncover the alien base's location.

Find a soldier with the Gift.

In a single game, complete every Autopsy.

Have a soldier survive every mission in a full game.

Clear a UFO crash site with one soldier on Classic or Impossible difficulty.

Beat the game on any difficulty.

Mind Control an Ethereal.

Designate a highly decorated soldier as the Volunteer.

Kill an unseen enemy detected by a specially modified soldier.