Simply put....it ain't Halo
Before I get into the whole reasons why...let me start off by calling out the developers. You broke an easy game. That's all I have to say. Shooters are supposed to be easy right? You pick up controller, you shoot dudes, and you call it a night. No, not for these guys. You pick up the controller and are so afraid to die because of the long load time and the melee button takes 5 seconds to use. And it’s a separate weapon! Great!
Going into more specifics, the gameplay is broken because of the many, and I mean many, design flaws. I hate to say it, Halo 2 has a better design then this game, and that says something since I believe that Halo 1 is better than 2. I base my comments on the enemy AI in hard and easy modes. The AI is smart...in fact, dare I say godlike. The AI knows where you are exactly and runs in your face and shoots you until you die...unfair even on easy. You can't melee them and the motion blur running thing serves no purpose at all. Infect if the whole game ran on motion blur it would look better.
That brings me to the next point. The graphics are impressive. For Xbox anyway. The graphics in the multiplayer levels are quite decent given when this game was developed. Singly player graphics need lots of work. And I can't see why that would be the case.
Back to the gameplay, the weapons are not fun to shoot, nor are they easy to access. The upgrades on weapons are a cheep way of not giving me new guns for half the game. The game is indeed lacking on that.
Note to developers: This isn't Halo, main character is not master chief. I do not know what they were trying to pull, but throwing a car at a character to jump over? Often times the enemy AI will get in vehicles and run you down, and since you are a human and not a Spartan, jumping over a hummer isn't possible....but it’s not like you have much choice, they gun for you.
All in all this game is bad, sound and all. I really had high hopes for this game...here's to seeing if the 360 can upgrade it a little.
Oh and about the multiplayer, non existent since no one is playing this game. The map feature is a nice novelty, but that's it...something to do.