D3 In the Dark simply changes the game so that the lighting is even less then what it is with the retail version. Things that go bump in the dark, will take on a whole new meaning, as the only source of illumination that will be found in this download will be the flashlight that you carry, or the one mounted on your pistol and shotgun, a few desklamps, and some swinging, half lit ceiling lights. You'll be amazed at how different DooM³ feels when you install this download!