Here is the full list of all 69 Halcyon 6: Starbase Commander achievements.
Successfully beat the game on Cadet difficulty.
Successfully beat the game on Lieutenant difficulty.
Successfully beat the game on Commander difficulty.
Killed the Mothership.
Made an ally of the Yabblings.
Killed the Chruul Behemoth.
Lost 10 Green Shirts in ground combat.
Made an ally of the Collective.
Killed the Chruul Desolator.
Built a tier five ship.
Rescue 15 colonies from a Chruul fleet.
Killed the Chruul Crusher.
Built 20 Base Rooms.
Made an ally of the Korzan.
Killed the Chruul Marauder.
Made an ally of the Xlar-Yanthu.
Made an enemy of the Voraash.
Built a tier four ship.
Killed the Chruul Chimera.
Built a tier three ship.
Had an officer reach Level 10.
Successfully cleared a Chruul spire.
Built 10 Base Rooms.
Destroyed 100 Chruul ships.
Researched 10 techs.
Defeated the Chruul at New Terra.
Built a tier two ship.
Researched 5 techs.
Defeated Admirax Zeb and his pirates.
Destroyed 25 pirate ships.
Have a ship reach rank four or higher.
Destroyed 25 Chruul ships.
Built 3 Base Rooms.
Had an officer reach Level 5.
Rescue 5 colonies from a Chruul fleet.
Have a ship reach rank three.
Destroyed 10 Chruul ships.
Made an alliance with the pirate Savak.
Destroyed 10 pirate ships.
Destroyed the Chruul Spawn Pit.
Have a ship reach rank two.
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 25 Green Shirts in ground combat.
Lost 50 Green Shirts in ground combat.
Lost 100 Green Shirts in ground combat.
Researched 20 techs.
Destroyed 100 pirate ships.
Recruit 10 officers.
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 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 Captain difficulty.
Successfully beat the game on Admiral difficulty.
Successfully beat the game on Grand Admiral difficulty.