Here is the full list of all 69 Halcyon 6: Starbase Commander achievements.
Lost 10 officers in the line of duty.
Made an enemy of the Xlar-Yanthu.
Made an enemy of the Korzan.
Killed the Chruul Behemoth.
Made an enemy of the Collective.
Killed the Chruul Desolator.
Killed the Chruul Crusher.
Made an enemy of the Yabblings.
Built a tier five ship.
Made an ally of the Yabblings.
Recruit 10 officers.
Made an ally of the Korzan.
Made an ally of the Collective.
Killed the Chruul Marauder.
Made an enemy of the Voraash.
Built a tier four ship.
Made an ally of the Xlar-Yanthu.
Killed the Chruul Chimera.
Built a tier three ship.
Had an officer reach Level 10.
Built 20 Base Rooms.
Successfully cleared a Chruul spire.
Destroyed 100 Chruul ships.
Rescue 15 colonies from a Chruul fleet.
Researched 20 techs.
Defeated the Chruul at New Terra.
Built a tier two ship.
Researched 10 techs.
Lose your first Green Shirt in ground combat.
Defeated Admirax Zeb and his pirates.
Destroyed 25 pirate ships.
Made an alliance with the pirate Khut.
Built 10 Base Rooms.
Have a ship reach rank four or higher.
Destroyed 25 Chruul ships.
Rescue 5 colonies from a Chruul fleet.
Had an officer reach Level 5.
Destroyed the Chruul Spawn Pit.
Have a ship reach rank three.
Researched 5 techs.
Destroyed 10 Chruul ships.
Have a ship reach rank two.
Successfully multiplied O'Brien.
Destroyed 10 pirate ships.
Built 3 Base Rooms.
Have a ship reach rank one.
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 ally 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.
Killed the Mothership.
Rescue 30 colonies from a Chruul fleet.
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 Captain difficulty.
Successfully beat the game on Admiral difficulty.
Successfully beat the game on Grand Admiral difficulty.