WW2 setting. Better than expected. Treyarch can be taken serious when doing Call of Duty.
Taking things back to World War 2, World at War splits into two theaters; The Russian pushing into Germany and the fight in the Pacific islands of Japan. They story is very well told and memorable and gruesome. The narrating of the story makes feel even MORE realistic.
The online play is not 'very' different from Call of Duty 4. Just the addition of new guns, gore, vehicles, a couple of new game modes, new level cap, and prestige class awards. There are a few new game modes for the online play, War, Capture the Flag, and Hardcore Free-for-All. The action is still as fast and exciting as Call of Duty 4; Sure as fresh as Call of Duty4 but it is still great online play. The guns are balanced, one new reward for a 7 kill streak. What people were asking for... DOGS. These dogs will rip the shred out of anybody. Of course they are not invincible as you can kill them, but they are very effective.
There are also two new game modes. Co-op and Zombie mode. Zombie mode is unlocked with the completion of Story mode on any difficulty. There is now split-screen co-op and online co-op. It puts you and whoever you're playing with on two sides and battle the same battle and keeps track of deaths, kills, and revivals. Online is basically the same without the dual screens. It is also very intense like the single player mode. It will keep your heart racing.
The bad thing about World at War is that it won't feel as fresh and new as Call of Duty 4 was. It has similar controls, mechanics, and same feeling with a WW2 theme.
Besides the Cons (which aren't very big) this is a must have for a Call of Duty fan or for any FPS fan. This is worth the money and once you play it, it will surprise you with what Treyarch has done.
---DeadlyWormy