Well, better keep looking. Ayy... But, on a more serious note, i can think maybe of two picks that can meet your standards.
One is already mentioned in this thread Spec Ops: The Line, the other is Frictional Games' SOMA.
The first one is basicly another retelling of "Heart of Darkness" by Conrad. So, you had a book about XIXc. colonialism, a movie about Vietnam war, and now a video game about heroic US Marines trying to bring a drop of stability to somewhere Middle East.
I think "The Line" does a graceful job, with its modern take on this, though I have more qualms about the game than your average reviewer, and don't particularly think meta stuff works that well. But, it's still a better (loose)adaptation than i'd expect from this medium.
SOMA on the other hand a horror/walking sim, that might be most crushingly dark take on transhumanist hopes and dreams i've seen in videogames(and does it in a non-standard way too).
Other than those, i can think of few titles that, while i don't think meet your requirements, could still be worth checking out.
"Grim Fandango" is a very rare example of a mature, while cartoony, game, that isn't overtly dark or (ha)grim, and also, what's that, has a plenty of humor to it??? And it got a remaster some time ago.
"Planescape: Torment", if that somehow slipped your mind. "Witcher 2" is basicly a fantasy political thriller.
You probably already played them, but OG Silent Hills(from Team Silent) are also good, though cult nonsense brings writing down at times.