Here is the full list of all 69 Halcyon 6: Starbase Commander achievements.
Killed the Chruul Behemoth.
Made an enemy of the Voraash.
Made an enemy of the Korzan.
Made an enemy of the Xlar-Yanthu.
Made an enemy of the Collective.
Destroyed 25 pirate ships.
Recruit 10 officers.
Killed the Chruul Desolator.
Killed the Chruul Crusher.
Made an ally of the Collective.
Made an ally of the Korzan.
Made an enemy of the Yabblings.
Made an ally of the Xlar-Yanthu.
Killed the Chruul Marauder.
Built a tier four ship.
Built 20 Base Rooms.
Killed the Chruul Chimera.
Rescue 30 colonies from a Chruul fleet.
Successfully cleared a Chruul spire.
Had an officer reach Level 10.
Built a tier three ship.
Rescue 15 colonies from a Chruul fleet.
Destroyed 100 Chruul ships.
Rescue 5 colonies from a Chruul fleet.
Researched 20 techs.
Defeated the Chruul at New Terra.
Built a tier two ship.
Lose your first Green Shirt in ground combat.
Researched 10 techs.
Built 10 Base Rooms.
Destroyed 25 Chruul ships.
Have a ship reach rank four or higher.
Did not ally with any of the pirate captains.
Defeated Admirax Zeb and his pirates.
Had an officer reach Level 5.
Have a ship reach rank three.
Destroyed 10 pirate ships.
Destroyed 10 Chruul ships.
Destroyed the Chruul Spawn Pit.
Have a ship reach rank two.
Researched 5 techs.
Built 3 Base Rooms.
Have a ship reach rank one.
Successfully multiplied O'Brien.
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 Yabblings.
Made an ally of the Voraash.
Lost 10 officers in the line of duty.
Made an alliance with the pirate Willa.
Made an alliance with the pirate Savak.
Made an alliance with the pirate Khut.
Built a tier five ship.
Killed the Mothership.
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.