Here is the full list of all 22 PERFECT MATTER achievements.
Conquer the Smouldering Dwarf
Conquer the Barren Planet
Conquer the Plasma Trap
Conquer the Crag Field
Conquer the Birthplace
Conquer the Zombie Star
Conquer the Ravaged Moon
Conquer the God's Cradle
Conquer the Bind
Conquer the Conduit
Chose the "End of Time" Ending.
Chose the "Assimilation" Ending
Acquire Every Milestone
Acquire Every Upgrade
Acquire 50 Cores
Acquire every Par Award
Amass 1,000,000 Quarks
Master every entry in the Enchididion
Acquire every entry in the Enchiridion
Earn a score of 25,000 in the Last Construct
Earn a score of 50,000 in the Last Construct
Earn a score of 100,000 in the Last Construct