Here is the full list of all 10 I (DON'T) HATE HENTAI PUZZLES achievements. It takes around 0-1 hour to unlock all of the achievements on Windows.
Watch the Teleportals trailer while it's still available
Beat the puzzle mode
Watch the ending credits
Who is that guy?
Finish the 1st puzzle
Hear out the Prophet
You're not doing it for Mr. G.
Finish the 2nd puzzle
You don't understand the point of these puzzles
Try to finish the 1st puzzle