Here is the full list of all 25 SEX Tentacles [18+] achievements.
inflict 5,000 physical cell damage
restore yourself to 5,000 health cells
lose for the first time
use the ability once
start a level with 4 boosters
complete first level
defeat Nova for the first time
defeat Trinity for the first time
defeat Blade for the first time
complete all levels
defeat Blade and Trinity
lose for ten times
lose for fifty times
inflict 5000 energy damage with cells
recover 5,000 shield points
use abilities 100 times
inflict 10,000 damage with abilities
restore 18,000 health with abilities
pass level 20 without boosters 20
increase specifications 5 times
increase specifications 10 times
increase specifications 20 times
pump up all the features to the max
undress the characters 10 times
undress the characters 50 times