WTH, I never even knew you could hide it, what a stupid mistake :/ I'm sorry about that and thanks for pointing it outEdit: ok... that wasn't it. It was unclicked actually. I don't know what else it could be.
Is it cause of the different versions of the game? There's the original and the Redux one. Steam only has a store page for the original. But they're 2 separate sets of achievements.
Edit 2: I clicked on the games page of someone else who finished the game, looked for the game, and it wasn't there either. Only the original Ethan Carter game:
The Vanishing of Ethan Carter Achievementsyou see the Redux version is this one:
The Vanishing of Ethan Carter Redux AchievementsSo it seems to be a problem with the game.
I changed my profile privacy a couple of times yes, last time I set it to public but I still get a "-" sign on the forum, probably just takes time to update