Here is the full list of all 69 Halcyon 6: Starbase Commander achievements.
Lost 10 Green Shirts in ground combat.
Built a tier five ship.
Built 20 Base Rooms.
Made an enemy of the Yabblings.
Made an enemy of the Collective.
Made an enemy of the Korzan.
Killed the Chruul Crusher.
Rescue 15 colonies from a Chruul fleet.
Made an enemy of the Xlar-Yanthu.
Made an ally of the Yabblings.
Killed the Chruul Marauder.
Built a tier four ship.
Made an ally of the Korzan.
Made an enemy of the Voraash.
Killed the Chruul Chimera.
Built a tier three ship.
Lost 10 officers in the line of duty.
Had an officer reach Level 10.
Successfully cleared a Chruul spire.
Destroyed 100 Chruul ships.
Defeated Admirax Zeb and his pirates.
Made an alliance with the pirate Willa.
Defeated the Chruul at New Terra.
Built a tier two ship.
Built 10 Base Rooms.
Researched 20 techs.
Destroyed 25 pirate ships.
Researched 10 techs.
Destroyed the Chruul Spawn Pit.
Have a ship reach rank four or higher.
Destroyed 25 Chruul ships.
Lose your first Green Shirt in ground combat.
Had an officer reach Level 5.
Researched 5 techs.
Rescue 5 colonies from a Chruul fleet.
Have a ship reach rank three.
Successfully multiplied O'Brien.
Destroyed 10 pirate ships.
Built 3 Base Rooms.
Destroyed 10 Chruul ships.
Have a ship reach rank two.
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 25 Green Shirts in ground combat.
Lost 50 Green Shirts in ground combat.
Lost 100 Green Shirts in ground combat.
Destroyed 100 pirate ships.
Recruit 10 officers.
Made an ally of the Collective.
Made an ally of the Xlar-Yanthu.
Made an ally of the Voraash.
Made an alliance with the pirate Savak.
Made an alliance with the pirate Khut.
Did not ally with any of the pirate captains.
Killed the Chruul Desolator.
Killed the Chruul Behemoth.
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.