Not necessarily a realistic game, but you could check out the horror game 1916. It takes place in german trenches and there are other things in the trenches, namely dinosaurs. A little silly, but it doesnt feel silly when you have a dino chasing you and all you have is a flare.
I think Dan Carlin made a VR experience that was just an experience of ww1 trench warfare. He had it set up in a museum and around the VR was a set that was supposed to emulate the feel and smell of a ww1 trench. I think you can the the VR experience at home though, you just wont get the touch.
A true investigative horror experience that requires actual deduction. Phasmophobia is kind of close, but I'm talking about real investigative work with a multitude of threats all around the world. Xcom, mixed with SCP and Phasmophobia.
I mean, I was a 25B in the army, which could be counted as technical, except that after training I pretty much never saw another army computer and became a radioman.
Idk man, humans are wild. WW2 germany fought for a loooong time after the war had really been lost.