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.
Killed the Chruul Desolator.
Killed the Chruul Crusher.
Built a tier five ship.
Made an enemy of the Xlar-Yanthu.
Made an enemy of the Yabblings.
Killed the Chruul Marauder.
Made an enemy of the Collective.
Made an enemy of the Korzan.
Built a tier four ship.
Lost 10 Green Shirts in ground combat.
Killed the Chruul Chimera.
Rescue 30 colonies from a Chruul fleet.
Successfully cleared a Chruul spire.
Researched 20 techs.
Built 20 Base Rooms.
Made an ally of the Xlar-Yanthu.
Defeated the Chruul at New Terra.
Built a tier three ship.
Had an officer reach Level 10.
Built a tier two ship.
Rescue 15 colonies from a Chruul fleet.
Destroyed 100 Chruul ships.
Lose your first Green Shirt in ground combat.
Rescue 5 colonies from a Chruul fleet.
Destroyed 25 Chruul ships.
Destroyed the Chruul Spawn Pit.
Have a ship reach rank four or higher.
Researched 10 techs.
Successfully multiplied O'Brien.
Built 10 Base Rooms.
Researched 5 techs.
Destroyed 10 Chruul ships.
Destroyed 25 pirate ships.
Had an officer reach Level 5.
Have a ship reach rank three.
Built 3 Base Rooms.
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.
Recruit 10 officers.
Made an ally of the Yabblings.
Made an ally of the Korzan.
Made an ally of the Collective.
Made an ally of the Voraash.
Made an enemy 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.
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 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.