Only slightly worse than COD4, it's a great game!
Campaign: The campaign puts you in the shoes of both a Russian and American soldier battling through countless Nazi and Red Army soldiers towards the final days of World War II and does a great job. There are Banzai attakers on the red army, these are soldiers who hide in pits or in tall grass and pop out as you are walking by, this adds to the intensity. Also tanks several tanks have flame throwers and there are several vehicles to mix up the action. I will also say that some levels are rediculously hard on Veteran so be warned! The sound and visuals are also top notch.
Multiplayer: The multiplayer is on par with it's older brother ( COD4 ) and while the maps might not be quite as good the action is no less intense. Several new features in the game are tht most of your sniper rifles no longer start out with scopes, they must be unlocked by getting 25 kills. The level cap has also been raised to 65 and once you get there you unlock a handheld Flamethrower, Boucing Bettys are also in my opion more effective than COD4's Claymores as they are harder to sprint by.
My final verdict is that Call of Duty: World at War is an awesome war game with a good campaign and awesome multiplayer. 9.0