How well advertised was this.
Gameplay is fairly average. You play a genetically engineered person fighting against alie...blah blah blah. My first observation was how bland the games locations were, and how repetitive the game itself was. The enemies themselves are fairly varied, but not vastly different from each other. When the Flood get involved, it all goes very downhill very fast. They are possibly the worst enemies in gaming history, and are the only enemies in the infamous Library level, which is an atrocity of cataclysmic proportions. It is the most repetitive thing since my GCSE physics years, and is, unbelievably, more painful. It was true endurance that saw me through this level, as I had paid hard earned money for the game and wanted to finish it, which I did. If you couldn't tell, I was ever so slightly underwhelmed by this highly rated piece of electronic entertainment.
The graphis were, at least, not terrible. Fairly good, but with bland character models and landscapes. In a word, repetitive.
Sound was uninteresting overall, but I liked the theme tune. It was what got me into the game.
Halo is a short game, with only 10 levels. There is online multiplayer, but you can only play as the Chief (in differently coloured suits, no less!). Lack of variety somehow springs to mind again.
Overall, I think you get my drift. I didn't enjoy this game, and I suppose I'm in a minority when I say this. There are better FPSs out there, such as Unreal Tournament 2004, Half-Life 2, Metroid Prime and the TimeSplitters series.
Play those instead.