Still remember that my Pentium 4 had struggle running this in high-res back in my college years because of those stunning "Dynamic Light" that made the torch light waving (remember that this was 2001 when the first Half-Life is still a Hot Cake). Now run it again with AMD Ryzen 6000 Series, finally I can crank all the Graphical setting all the way to the right. What a happy day. :) Now if you want to play this in HD Widescreen resolution, you can search for "iortcw" mod in github.