All hell is breaking loose!

I played Doom 3 today and it played a lot better than I thought it would. The shots inside are of it playing on my Mac Mini at "Low" detail settings. Even at those settings it looks like you are playing a movie. As a matter of fact I almost couldn't believe I was playing a game at times especially on parts like where the imps come out. The environments seem so rich and it's a treat to explore them. The characters are so very detailed it's really cool. Once all hell starts breaking loose the game is pretty scarey too because the monsters are so much tougher and I am not sure where I am going, etc. In short, I am having a good time.
( Screenshots inside )