Here is the full list of all 36 Full Metal Furies achievements.
Destroy the World
Unlock every piece of equipment for every Class
I always wanted a sibling
Unlock every item in the Treasury
Unlock Cerby
Make a choice
See the World
Defeat Titan King Prometheus
Enter the Cave
Solve the Last Puzzle
Solve the Fourth Puzzle
Find All Monolith Stones in the Stygian Well
Appease Ferryman Charon
Solve the Fifth Puzzle
Defeat Planetar Cronus
Find all Monolith Stones in Tartarus
Solve the Third Puzzle
Defeat Sky Sniper Lelantos
Complete all Class challenges
Find all Monolith Stones in the Desert of Atlantis
Solve the Second Puzzle
Find and translate all Monolith Stones in the Foloi Forest
Solve the First Puzzle
Crack the code for at least 1 Computer
Find and translate all Monolith Stones in Thessaly
Air crit an enemy 5 times in a row
Have 1 point in every skill for 1 Class
Master a piece of equipment by reaching its max level
The synopsis looks grim
Defeat Land Fortress Coeus
Defeat Wavebreaker Meneotius
Unlock Go-Cat
Earn 1 level in your equipment
Unlock your first piece of equipment
Find your first Monolith Stone
Complete the game (true end) on NG+