Complete the indicated task to unlock the achievement.

Achievement	How to unlock
Air Superiority	Have an interceptor shoot down 20 UFOs.
All Your Base	Capture the Cleaner facility.
Commander Victory	Win the campaign on Commander difficulty.
Counterfire	Kill an alien with reaction fire during a tactical combat mission.
Expansionist	Construct an additional base on the Geoscape.
First Contact	Kill an alien in a tactical combat mission.
First Of Many	Lose a soldier in a tactical combat mission.
Future Warfare	Kill an alien with an energy weapon.
God Of War	Have a soldier with 20 alien kills.
Maximum Power	Have a soldier achieve the rank of Colonel.
Recruit Victory	Win the campaign on Recruit difficulty or higher.
Soldier Victory	Win the campaign on Soldier difficulty or higher.
Stunning Work	Cause an enemy unit to fall unconscious.
Sunk My Battleship	Shoot down a Battleship UFO with an interceptor.
Ultimate Power	Deploy a squad consisting entirely of Colonels on a tactical mission.
Unfriendly Fire	Kill one of your own soldiers during a tactical combat mission.
Veteran Victory	Win the campaign on Veteran difficulty or higher.
War Machine	Equip a soldier with a Colossus Battlesuit.
Welcome To Earth	Shoot down a UFO with an interceptor.
Xenonaut	Set foot upon the alien homeworld.