Here is the full list of all 100 Hentai Mosaique Puzzle achievements. It takes around 0-1 hour to unlock all of the achievements on Windows.
COMPLETE THE FINAL MICHIKO & KAORI STAGE AND GET HER UNDRESSED
COMPLETE THE FINAL NATSUMI STAGE AND GET HER UNDRESSED
FINALLY!!
TOO MUCH!! STHAP!
PUZZLE SOLVING OVERLOAD!
PUZZLE SOLVING SPREE!
COMPLETE THE FINAL RIKA STAGE AND GET HER UNDRESSED
PEEKER!
WELL THAT'S A LOT
SOLVED!
THERE YOU GO!
COMPLETE THE FINAL MIKO STAGE AND GET HER UNDRESSED
AND ANOTHER ONE!
ANOTHER ONE!
BLOCKS FITTED SOME PUZZLE PIECES!
THAT'S A LOT OF PUZZLES
FITTED SOME PUZZLE PIECES!
COMPLETE THE FINAL KYOKO STAGE AND GET HER UNDRESSED
CLICK THE PUZZLE PIECES 1000 TIMES
NICELY PACKED TOGETHER!
LOOK HOW AWESOME I AM!
FITTED SOME PUZZLE PIECES TOGETHER!
3 TIMES CHEATED?
GOOD PROGRESS!!!
COMPLETE THE FINAL HAICHI STAGE AND GET HER UNDRESSED
...AND THERE IS THE SECOND TIME
CLICK THE PUZZLE PIECES 500 TIMES
THERE IS ALWAYS THE FIRST TIME!
COMPLETE THE FINAL AKIKO STAGE AND GET HER UNDRESSED
CLICK THE PUZZLE PIECES 100 TIMES
GREAT START!