Here is the full list of all 24 Colony Siege achievements.
Awarded the Speedy Recovery Perk
Awarded the Enhanced Incentives Perk
Awarded the Armored Repair Towers Perk
Awarded the Factory Teleporters Perk
Awarded the Environmental Protection Perk
Awarded the Subsidized Weapon Testing Perk
Awarded the Quantum Ordinance Perk
Awarded the Anti-corrosive Foundations Perk
Awarded the Emergency Conscription Perk
Awarded the Advanced Salvaging Techniques Perk
Awarded the Licensed to Maze Perk
Awarded the Specialized Ammunition Perk
Awarded the Streamlined Factories Perk
Awarded the Quantum Reactor Perk
Awarded the High Capacity Quarters Perk
Awarded the Scuttle Protocol Perk
Awarded the Quantum Nanites Perk
Awarded the Multilayered Ground Armor Perk
Awarded the Plentiful Ground Units Perk
Awarded the Combat Preparations Perk
Awarded the Quantum Combat Perk
Awarded the Multilayered Defensive Armor Perk
Awarded the Robot Crew Perk
All perks achieved and all missions won on Hard. Command ship and everything it builds turns to gold.