Wow, what an awsome war game! CoD4 delivers a 1st person shooter experiece that you cannot find anywhere else.
I was immediately immersed into the story line with the opening prologue. From that point I could tell this would be a game I could not put down until the story was done. The graphics are just phenomenal and the story of dictators, coups, and arms dealers (although a bit short) keeps you coming back for more. I really enjoyed the diversity of locations and the amount of usable area in each scenario... it really makes for a better experience when you can feel that you're not playing in a very confined box.
CoD4 also brings a whole lot to the table online.... move over Halo, this CoD multiplayer is as spectacular with multiple game modes and an excellent example of how to have good online play. I have been impressed so far with the low lag and ease of setting up online matches which seems to plague some other 360 titles. There is also something to be said for the realism you get in this type of 1st person shooter no matter if you're online or in campaign mode. I like the addition of the kill cam which gives you a close and personal look at your death while you wait to respawn.
I am also happy to see that CoD4 has an arcade mode with yet more challenges. These can get a bit repetitive, but maybe this would be the venue for additional content for the title in the future.
Overall CoD4 delivers on all categories well and has a significant replay potential and an expansive online mode. Its definitely worth checking out!