[megakid]

I had a similar experience when playing Half Life for the first time. As a child grown up with Doom, Quake and perhaps Unreal (can’t remember if that came afterwards or not), it was the first one that really caught my imagination. That intro level on the monorail still rates as my best immersive gaming experience I’ve had.

[atomi]

My vote would be for Medal of Honor: Allied Assault. https://youtube.com/watch?v=U3EnVrAquBA

[fastball]

I'm a big fan of the opening in Call of Duty 4: Modern Warfare.

[dmos62]

https://www.youtube.com/watch?v=TGzGsb_TPtI

I had forgotten how good it is. The whole game was very good. The next one, World at War was also good, but I didn't enjoy any of the later installments.