[Mik]

Originally Posted by glebray

Call of Duty 4 is easily better than Halo 3. The online is more fun because its more than just doing the same thing in every game(more in depth i guess is what I'm trying to say), and the campaign in COD4 is the most fun campaign I have ever played. And the Halo 3 campaign isn't very fun after the first few minutes.

I don't see how it can be called more in depth. Halo 3 and COD4 have several similar game modes, and Halo 3 actually has more unique game modes than COD4 does. Halo has Forge and Custom games where COD4 simply has custom games that are also a lot more limited in their customizability. Halo has Theater.
COD4 campaign is fun, but I don't see why Halo 3 isn't as fun if not more fun. Halo campaign offers up to 4 person co-op, COD4 has no co-op. Both campaigns are very short, and both are relatively easy, even on their hardest difficulties. Both offer unlockable extras that serve to make the campaign more interesting.
So it's always going to be a matter of preference on which game you like more, but in my honest opinion, Halo 3 has a lot more to offer.