Here is the full list of all 11 Hentai Octoq Puzzle achievements. It takes around 1-2 hours to unlock all of the achievements on Windows.
Level 10 completed
Level 9 completed
Level 8 completed
Level 7 completed
Level 6 completed
Level 5 completed
Level 4 completed
Countless perverted clicks
Level 3 completed
Level 2 completed
Level 1 completed