Adam Wolfe

It seems like by any reasons (using a hint, glitch etc.), if you miss this achievement, you have to play all the Hidden Object Puzzles again. Eventhough I probably used the hint during the early game (it might have glitched too, read lots of comments around for this and can't clearly remember that I used a hint), I had to repeat the whole game until the last hidden object puzzle (didn't have to complete the rest of the chapter).

Also consider to disable hints from options (by selecting difficulty as custom then uncheck the hint box) to not repeat my mistake.

To sum up; if you missed this on your first go, create a new profile and play each chapter until their last hidden object puzzle and jump to the next chapter until you are done.