Here is the full list of all 35 Slave Zero X achievements.
Enter the training room
Browse the shop
Overcome Atavaka
Clear Zone 1
Clear Zone 2
Clear Zone 3
Clear Zone 4
Clear Zone 5
Clear Zone 6
Defeat The Iron General, Hercules J. Thorman – First of the Five Calamities
Defeat Enyo – Second of the Five Calamities
Defeat Uriel – Third of the Five Calamities
Defeat Regent Wuguan – Fourth of the Five Calamities
Overcome your ally
Overcome your lover
Overcome your enemy
Bomb, rope, lamp oil, you got it!
Shop till you drop (dead)
Get an 'S' rating
Clear all levels with an 'S' rating
Unlock all lore
Achieve a 20-hit combo
Complete the game in one sitting under two hours
Achieve a 50-hit combo
Make a free-throw!
Turn 20 enemies into a fine red mist
Parry 30 attacks
Enter the Megacity
Get down in the disco
View all story scenes
Unknowingly committed Fratricide
Fully upgrade Shou's attributes
Time out Devil's Precipitation
Deny a man his well earned pay raise
Discover a hidden technique