Immersive Games?

I'm wondering what immersive games people have played before, as in, the world felt real, and you felt a part of it.My immersive game that I really like is Grand Theft Auto IV. When going around the epicly scaled city, you see the ads, you see people talking on park benches, you see jaywalking citizens, you see drivers with bad judgement. It feels like how a city should be. If you get hit by a car, maybe the driver will shout "My dad's going to kill me!". Everything is very detailed, and the way the city feels, it's just breathtaking.What's your immersive game?

Far Cry.
There was a mutant human behind me and when I turned to see it,
it felt as if it was in the room and I got a huge fright.

The games that have the best stroyline probably are the most immersive but the biggest one for me was TWEWY. I'm not sure if anyone will agree with me but thats definitely my top one.