I finally snagged DOOM3 on Monday night and quickly installed it into my computer. I have to say it's excellent game, most areas is quite too dark to see, despite brightness scale is already jacked up to max. That forces me to use flashlight almost all times to be able to see what I'm bumping into. The graphic is excellent, but my computer keeps burning up, I had to remove the covering thing and place the fan toward my computer to keep it cool. Turns out DOOM3 is bit too much for my ATI Radeon 9500 pro card to handle, LOL.
Get one from your nearest shop or IRC.