ITT: Game Ideas you wish were made real
I was thinking of a Vietnam War Horror game. I would say it would be a good setting for a Survival horror with such things like; The Tunnels, Ghost Tape Number 10 or The Jungle itself. Maybe you are a Vietcong trying to survive the night in the dark jungle with Spirits and other supernatural beings.
There is a game kinda similar to what you described. It is pretty old.
https://www.youtube.com/watch?v=508vUTeGqaA