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