Here is the full list of all 69 Halcyon 6: Starbase Commander achievements.
Successfully beat the game on Captain difficulty.
Killed the Mothership.
Killed the Chruul Behemoth.
Killed the Chruul Desolator.
Built a tier five ship.
Made an ally of the Xlar-Yanthu.
Made an ally of the Yabblings.
Made an ally of the Korzan.
Lost 10 officers in the line of duty.
Killed the Chruul Crusher.
Made an ally of the Voraash.
Successfully multiplied O'Brien.
Made an ally of the Collective.
Killed the Chruul Marauder.
Built a tier four ship.
Killed the Chruul Chimera.
Successfully cleared a Chruul spire.
Built 20 Base Rooms.
Built a tier three ship.
Researched 20 techs.
Recruit 10 officers.
Had an officer reach Level 10.
Rescue 30 colonies from a Chruul fleet.
Defeated the Chruul at New Terra.
Destroyed 100 Chruul ships.
Defeated Admirax Zeb and his pirates.
Destroyed the Chruul Spawn Pit.
Rescue 15 colonies from a Chruul fleet.
Rescue 5 colonies from a Chruul fleet.
Destroyed 25 Chruul ships.
Have a ship reach rank four or higher.
Built a tier two ship.
Researched 10 techs.
Destroyed 25 pirate ships.
Had an officer reach Level 5.
Made an alliance with the pirate Khut.
Built 10 Base Rooms.
Have a ship reach rank three.
Destroyed 10 Chruul ships.
Have a ship reach rank two.
Destroyed 10 pirate ships.
Have a ship reach rank one.
Built 3 Base Rooms.
Researched 5 techs.
Lose your first Green Shirt in ground combat.
Had an officer reach Level 2.
Finished the tutorial.
Built a base room.
Built a tier one ship.
Lost 10 Green Shirts in ground combat.
Lost 25 Green Shirts in ground combat.
Lost 50 Green Shirts in ground combat.
Lost 100 Green Shirts in ground combat.
Destroyed 100 pirate ships.
Made an enemy of the Yabblings.
Made an enemy of the Korzan.
Made an enemy of the Collective.
Made an enemy of the Xlar-Yanthu.
Made an enemy of the Voraash.
Made an alliance with the pirate Willa.
Made an alliance with the pirate Savak.
Did not ally with any of the pirate captains.
Tried to give the station to pirates...seriously?
Decided to pay off the Yabbling debt for the next couple millennia.
Successfully beat the game on Cadet difficulty.
Successfully beat the game on Lieutenant difficulty.
Successfully beat the game on Commander difficulty.
Successfully beat the game on Admiral difficulty.
Successfully beat the game on Grand Admiral difficulty.