Doom 3- Graphical Heaven in the bowels of Hell

Doom 3 is the first Sci-Fi horror game since System Shock 2 to be genuinely scary. I actually decided the first time I played it, that I would turn out the lights, and put my headphones on. Well, that lasted for about an hour. By that time, I was so paranoid that I kept looking over my shoulder, waiting for something to jump out of the shadows of my kitchen. Then my cat decided to actually do just that, and I almost had a heart attack!