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