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