Why did you make the guys with exploding heads who run at you and their scream gets louder as they approach? I can still hear them.
One of my favourite games.
The worldbuilding in Half-life was so good. You weren't a character walking into rooms and enemies would attack you, like Doom and Quake. There was a big event happening, and you were just a part of it.
It was on par with my first playthrough of the original HL so many years ago.
Which are actually voice lines of people in torment played in reverse.