My safest bet is Until Dawn. Why? Just look at Stranger Things. Both share a sort of teenage drama basis and a strong paranomal component, with mysterious disappereances and a thriller/horror vibe. They differ in a lot of things, but they feel so similar it's scary.
The first one to pop to mind, though, was Life is Strange. Even though the story is heavily dependant on the players' choices, I think it would make for a great teenage drama.
...I'm not even into that genre, why do so many come to mind?
It's just that...I prefer videogames with an emphasis on atmosphere. That's videogames' greatest potential and their major distinctive factor, and that's what I enjoy the most. And that's hard to convey into any other media. Dark Souls would lose all of its charm as a series or even as a movie, because exploration can't be easily represented when it's so prevalent without making it boring. Only games with a good and engaging plot with little gameplay interaction (and both Until Dawn and Life is Strange are considered as sorts of interactive movies) can be transposed with no major losses.
That made me think of the Zero Escape series, though. The plot is so mindblowing (well, from what I've played so far) that it would make for a stellar series, imho.