The excellent FPS that turned the Xbox into a must-have.
You are currently reading a review about one of the greatest games of all time (and I usually wouldn't say that about anything other than a Nintendo game). The story and gameplay are great, you will never get bored with it, the multiplayer is AMAZING. Ok, to be honest I don't play it much now, but I think I may have spent about 1000 hours on it altogether and the period of time I played it everyday was about 3 months. It's so satisfying to beat down Tartarus, but then you think, "Why not try it on legendary?" So you do. The games storyline continues from the original Halo (also a great game) but it satisfies in so many other ways, such as playing as the Arbiter, or driving the Wraith, which did feature in Halo but was undrivable.
But aside from all that, the main point of this game - multiplayer. You have NOT played anything like it before. Up to 4 players split screen, or 16 with LAN, and then you have the fabled XBOX LIVE! This allows you to strategically communicate with your team mates using the Xbox Live Headset, and it adds to the fun as the person sitting next to you can't just look at your portion of the screen to find out where you are, they will have no idea where any of their enemies are. The most compelling and strategic game, even now that its over 2 years old.
All I have to say now is to get Halo 2 if you haven't already done so.