You know, here's a bit of a funny story.
I played THSC a few months ago on my schol laptop, and some achievements just didn't unlock, although I did them.
Those were: Rise 'n Shine, Ending: CeO, and Respects.
I unlocked them using SAM, but because of my "OCD", I was kinda stressing about the achievement unlock order. But now, I realized the hidden meaning.
Rise 'n Shine refers to me 100%-ing this game in a few days.
Ending: CeO refers to me cleaning every ending out.
Respects refers to "me getting respect" for 100%-ing this game.