Here is the full list of all 69 Halcyon 6: Starbase Commander achievements.
Successfully beat the game on Cadet difficulty.
Killed the Mothership.
Killed the Chruul Behemoth.
Recruit 10 officers.
Built a tier five ship.
Made an ally of the Collective.
Killed the Chruul Desolator.
Killed the Chruul Crusher.
Made an ally of the Yabblings.
Killed the Chruul Marauder.
Made an ally of the Korzan.
Made an ally of the Xlar-Yanthu.
Made an enemy of the Voraash.
Built a tier four ship.
Killed the Chruul Chimera.
Lost 10 Green Shirts in ground combat.
Built 20 Base Rooms.
Rescue 15 colonies from a Chruul fleet.
Had an officer reach Level 10.
Built a tier three ship.
Researched 20 techs.
Successfully multiplied O'Brien.
Successfully cleared a Chruul spire.
Destroyed 100 Chruul ships.
Built 10 Base Rooms.
Rescue 5 colonies from a Chruul fleet.
Researched 10 techs.
Destroyed 25 Chruul ships.
Have a ship reach rank four or higher.
Researched 5 techs.
Built a tier two ship.
Built 3 Base Rooms.
Destroyed 10 Chruul ships.
Destroyed the Chruul Spawn Pit.
Had an officer reach Level 5.
Defeated Admirax Zeb and his pirates.
Have a ship reach rank three.
Made an alliance with the pirate Khut.
Have a ship reach rank two.
Lose your first Green Shirt in ground combat.
Destroyed 10 pirate ships.
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 25 Green Shirts in ground combat.
Lost 50 Green Shirts in ground combat.
Lost 100 Green Shirts in ground combat.
Destroyed 25 pirate ships.
Destroyed 100 pirate ships.
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.
Lost 10 officers in the line of duty.
Made an alliance with the pirate Willa.
Made an alliance with the pirate Savak.
Did not ally with any of the pirate captains.
Defeated the Chruul at New Terra.
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 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.