Here is the full list of all 69 Halcyon 6: Starbase Commander achievements.
Successfully beat the game on Commander difficulty.
Killed the Mothership.
Recruit 10 officers.
Killed the Chruul Behemoth.
Killed the Chruul Desolator.
Made an ally of the Xlar-Yanthu.
Killed the Chruul Crusher.
Built a tier five ship.
Lost 10 officers in the line of duty.
Made an ally of the Collective.
Killed the Chruul Marauder.
Made an ally of the Yabblings.
Built a tier four ship.
Made an ally of the Korzan.
Lost 10 Green Shirts in ground combat.
Built 20 Base Rooms.
Killed the Chruul Chimera.
Researched 20 techs.
Successfully cleared a Chruul spire.
Rescue 30 colonies from a Chruul fleet.
Had an officer reach Level 10.
Built a tier three ship.
Defeated the Chruul at New Terra.
Destroyed 100 Chruul ships.
Built a tier two ship.
Researched 10 techs.
Built 10 Base Rooms.
Rescue 15 colonies from a Chruul fleet.
Lose your first Green Shirt in ground combat.
Destroyed 25 Chruul ships.
Researched 5 techs.
Have a ship reach rank four or higher.
Rescue 5 colonies from a Chruul fleet.
Destroyed 10 Chruul ships.
Destroyed the Chruul Spawn Pit.
Successfully multiplied O'Brien.
Have a ship reach rank three.
Built 3 Base Rooms.
Had an officer reach Level 5.
Destroyed 25 pirate ships.
Have a ship reach rank two.
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 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.
Made an enemy of the Voraash.
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 Admirax Zeb and his pirates.
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 Cadet difficulty.
Successfully beat the game on Lieutenant difficulty.
Successfully beat the game on Captain difficulty.
Successfully beat the game on Admiral difficulty.
Successfully beat the game on Grand Admiral difficulty.