To add to all other people's memories and nostalgia about this game, I remember back when this game first came out, I had a AMD 2800XP Barton, 1 GB RAM and ATI Radeon 9700 (Non-Pro, but overclocked to stock Pro speeds) and had to run the game on medium-ish settings. Wasn't until a few years later I had to replace the graphics card with an Nvidia 6800GT since my ATI card died that I was able to run the game fully, though load times were still such a pain.
Honestly though, my memories of this game were that it was kinda boring after a while. The out-of-the-closet scare tactic of monsters popping out does get very tiresome, and the dark lighting adds to the cheapness of it. Also at the time, Half Life 2 was out as well so I was quite split between the two games.