When I heard it on the first playthrough I thought we were gonna have to rescue someone. After about 15 min I realized it was just a random noise...lol
The creepiest part of HL2 for me was the start of Ravenholm, when the music kicks in and the dead half of the zombie is swinging from the tree...once it was clear nothing really horrible was going to happen, it wasn't scary anymore.
Except for the fast zombies.
I know people have gone over the did-Breen-escape thing a million times, but here's 1 piece of info I haven't seen discussed.
In that red room in Ep 1 the Advisor's escape pod had "LOC17" printed on the side. On the first playthrough, I never noticed that writing, but this time I read it and...