Well Halo CE was praised for pretty much everything at the time...except the frame-rate.
Halo 2 didn't sink because it had the best MP at the time, and that's why Halo 3 was so successful.
So Halo 3's campaign isn't all that great...but the MP is spectacular...(IMO)...along with all the other added features, forge, theater, etc...
Although I prefer Call of Duty 4 for a variety of reasons, the ability to unlock perks and equipment to customise to you play style is nice, and the slightly less bunny hopping and more satisfying weapons. Also, who can't love the SAS when they lose a game?
Once i get an Xbox 360 I am going to buy CoD4 and then Halo 3 and then finally get Xbox Live
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