Doom 3 is just simply the best-looking game out there for the Xbox. Online is a good source, like co-op and deathmatch.
The story is not very Halo style, but it keeps you hook by realizing what might happen next in the upcoming events and tasks. Sometimes the tasks will get your mind broken because they are sometimes based on the same exact thing. Example, collecting a keycard, or typing a password, or just simply walking through an area and blasting your enemies in groups.
The graphics are just as solid as a rock by a tree. Sometimes the same wall texture will repeat itself, and most of the time you are in undergrounds of Mars. The opponents are looking like the 360 graphics, but if they put this game on the 360, it would really get some lawsuits of heart attacks.
Gameplay is really odd formula they added. Your alien opponents will respawn a lot, and we mean a lot! When you get scratch, your screen will turn red and it kinda gets you annoyed when the same scratch art on your screen will appear over and over again. You will verse the same old enemies, and you better get use of it because you will fight them through the whole game, even the Cybor Demon!
Online is a fright! You can be in deathmatches, tourney, and team deathmatch. But the thing will catch your eye is, Online Co-Op! This is maybe the best online adventure game for the Xbox. Recently, the creators will add in some maps in the content download so you will never get old with the game.
Doom 3 is just maybe the best in its series.