Here is the full list of all 69 Halcyon 6: Starbase Commander achievements.
Finished the tutorial.
Lose your first Green Shirt in ground combat.
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.
Built a base room.
Built 3 Base Rooms.
Built 10 Base Rooms.
Built 20 Base Rooms.
Researched 5 techs.
Researched 10 techs.
Researched 20 techs.
Destroyed 10 Chruul ships.
Destroyed 25 Chruul ships.
Destroyed 100 Chruul ships.
Destroyed 10 pirate ships.
Destroyed 25 pirate ships.
Destroyed 100 pirate ships.
Recruit 10 officers.
Had an officer reach Level 2.
Had an officer reach Level 5.
Had an officer reach Level 10.
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.
Did not ally with any of the pirate captains.
Defeated the Chruul at New Terra.
Destroyed the Chruul Spawn Pit.
Defeated Admirax Zeb and his pirates.
Successfully cleared a Chruul spire.
Have a ship reach rank one.
Have a ship reach rank two.
Have a ship reach rank three.
Have a ship reach rank four or higher.
Built a tier one ship.
Built a tier two ship.
Built a tier three ship.
Built a tier four ship.
Built a tier five ship.
Killed the Chruul Chimera.
Killed the Chruul Desolator.
Killed the Chruul Crusher.
Killed the Chruul Behemoth.
Killed the Chruul Marauder.
Killed the Mothership.
Rescue 5 colonies from a Chruul fleet.
Rescue 15 colonies from a Chruul fleet.
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 Commander difficulty.
Successfully beat the game on Captain difficulty.
Successfully beat the game on Admiral difficulty.
Successfully beat the game on Grand Admiral difficulty.