Now, I didn't know if this had to be in Help or here, but hell, let's just put it here.
HL1 runs like crap.
By that I mean, for some reason, there is a MAXIMUM FPS barrier in my game. As in, my FPS in any given HL1 game can NOT go above 15. It's like 30 in NS, and 20 in CS. All the while...