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