What's the most immersive video game that you've played?

In my case it's definitely DayZ. It's an open-world zombie-survival multiplayer game.

I'm not a huge gamer myself but that one has always stood out to me above all the others. Once you've spent hours into a character you seriously don't want to get killed. The map is massive and there's only 60 other people at best so you often don't even run into anyone - only hear the occasional gunshot in the distance. Wearing headphones lets you hear 360-degree sounds and the proximity voice chat I think is pretty cool feature too. It's often jokingly called hiking simulator since you, for the most part, just run in a forests.

It's also the only game where I've genuinely felt bad about shooting another player. Self-defence is a different case but just cold blood murder only because I can has multiple times left me feeling kinda shitty, so nowdays I just try and talk to people and then usually I get shot instead. I've also often felt absolutely terrified, hiding in a corner of a room in a house hiding from another player who I've just realized is close to me. I haven't felt anything like that with any other game and have felt that DayZ is quite unique in that sense.

I must add, thought, that those flight simulator cockpits that people have built for themselves seem kind of intriguing too.