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