Here is the full list of all 16 Nympho's Path achievements.
Unlock every Achievement
Check the credits
Complete stage 37
Collect 117 Stars
Complete stage 33
Collect 100 Stars
Complete stage 27
Unlock everything on the Gallery
Collect 75 Stars
Complete stage 21
Collect 50 Stars
Complete stage 15
Complete stage 09
Collect 25 Stars
Complete stage 03
Complete stage 01