The original 'Doom' revolutionized the 3D Gaming genre since Wolfenstein 3D; with the return of Wolfenstein in 2001 being a near classic, Doom 3 does not disappoint as a long returned sequel.
Pros: The graphics in this game are phenominal and raise the bar in comupter gaming. The storyline exists as opposed to the older Dooms where the game sometmes reflects and makes more sense as the game goes on. The classic demons and beasties are back. The PDA device is a nice new feature in a game, something I haven't seen since System Shock 2. Also, this game is so creepy that I opted to play it in the dark when I could and was well worth and highly recommended.
Cons: As the game progresses both the bosses get easier and spawning becomes more excessive. I personally do not like the fact that the double-barreled shotgun is not in this game.
Final Thought: Even though I haven't seen nor played Half Life 2 yet, this game is a pure classic and sets the bar in FPS gaming since the original Half Life. The mission in 'Hell' is supurb and will be noted as one of the most remeber in my gaming history.