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