The Vanishing of Ethan Carter is an adventure game available on Steam for $19.99 (I got it on a Steam Sale for $7).
It has a “very positive” rating on Steam, and is tagged with “detective”, “first person”, “mystery”, and “atmospheric”.
I finished it in 10 hours, and that included getting ALL the achievements (one of which I had to Google). So, it’s pretty short and it doesn’t have much replay-ability.
It’s gorgeous and well-written. It’s clever and unique. It has some surprises. It’s pretty dark, a bit creepy, but not at all scary. There is one particular scene that requires some time/location management, but overall it can be done at a very relaxed pace.
You are given very little information so it can be challenging to figure out exactly what you are supposed to do with the puzzles, but that is part of the game.
I would definitely recommend his game. Given its length, I’d say grab it if it goes on sale for less than $15. It was definitely worth my $7, but I would also be satisfied if I spent $14.99.